10 years agoasm-generic: rename atomic.h to atomic-long.h
Arnd Bergmann [Wed, 13 May 2009 22:56:29 +0000]
asm-generic: rename atomic.h to atomic-long.h

The existing asm-generic/atomic.h only defines the
atomic_long type. This renames it to atomic-long.h
so we have a place to add a truly generic atomic.h
that can be used on all non-SMP systems.

Signed-off-by: Remis Lima Baima <remis.developer@googlemail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Ingo Molnar <mingo@elte.hu>

10 years agoasm-generic: add a generic unistd.h
Arnd Bergmann [Wed, 13 May 2009 22:56:28 +0000]
asm-generic: add a generic unistd.h

A new architecture should only define a minimal set of system
calls while still providing the full functionality. This version
of unistd.h has gone through intensive review to make sure that
by default it only enables syscalls that do not already have
a more featureful replacement.

It is modeled after the x86-64 version of unistd.h, which unifies
the syscall number definition and the actual system call table
in a single file, in order to keep them synchronized much more
easily.

This first version still keeps legacy system call definitions
around, guarded by various #ifdefs, and with numbers larger
than 1024. The idea behind this is to make it easier for
new architectures to transition from a full list to the reduced
set. In particular, the new microblaze architecture that should
migrate to using the generic ABI headers can at least use an
existing uClibc source tree without major rewrites during the
conversion.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

10 years agoasm-generic: add generic ABI headers
Arnd Bergmann [Wed, 13 May 2009 22:56:27 +0000]
asm-generic: add generic ABI headers

These header files are typically copied from an existing architecture
into any new one, slightly modified and then remain untouched until
the end of time in the name of ABI stability.

To make it easier for future architectures, provide a sane generic
version here. In cases where multiple architectures already use
identical code, I used the most common version. In cases like
stat.h that are more or less broken everywhere, I provide a
version that is meant to be ideal for new architectures.

Signed-off-by: Remis Lima Baima <remis.developer@googlemail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

10 years agoasm-generic: add generic sysv ipc headers
Arnd Bergmann [Wed, 13 May 2009 22:56:26 +0000]
asm-generic: add generic sysv ipc headers

The ipc64 data structures were originally meant to
be architecture specific so that each architecture
could add their own optimizations for padding.

In the end, most of them just copied the x86 version,
and most got that wrong. UClibc expects the x86 anyway,
so we might just declare that the default and get
rid of the extra copies.

Signed-off-by: Remis Lima Baima <remis.developer@googlemail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

10 years agoasm-generic: introduce asm/bitsperlong.h
Arnd Bergmann [Wed, 13 May 2009 22:56:25 +0000]
asm-generic: introduce asm/bitsperlong.h

This provides a reliable way for asm-generic/types.h and other
files to find out if it is running on a 32 or 64 bit platform.

We cannot use CONFIG_64BIT for this in headers that are included
from user space because CONFIG symbols are not available there.
We also cannot do it inside of asm/types.h because some headers
need the word size but cannot include types.h.

The solution is to introduce a new header <asm/bitsperlong.h>
that defines both __BITS_PER_LONG for user space and
BITS_PER_LONG for usage in the kernel. The asm-generic
version falls back to 32 bit unless the architecture overrides
it, which I did for all 64 bit platforms.

Signed-off-by: Remis Lima Baima <remis.developer@googlemail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

10 years agoasm-generic: rename termios.h, signal.h and mman.h
Arnd Bergmann [Wed, 13 May 2009 22:56:24 +0000]
asm-generic: rename termios.h, signal.h and mman.h

The existing asm-generic versions are incomplete and included
by some architectures. New architectures should be able
to use a generic version, so rename the existing files and
change all users, which lets us add the new files.

Signed-off-by: Remis Lima Baima <remis.developer@googlemail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

10 years agoLinux 2.6.30
Linus Torvalds [Wed, 10 Jun 2009 03:05:27 +0000]
Linux 2.6.30

10 years agochar: mxser, fix ISA board lookup
Peter Botha [Wed, 10 Jun 2009 00:16:32 +0000]
char: mxser, fix ISA board lookup

There's a bug in the mxser kernel module that still appears in the
2.6.29.4 kernel.

mxser_get_ISA_conf takes a ioaddress as its first argument, by passing the
not of the ioaddr, you're effectively passing 0 which means it won't be
able to talk to an ISA card.  I have tested this, and removing the !
fixes the problem.

Cc: "Peter Botha" <peterb@goldcircle.co.za>
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

10 years agojbd: fix race in buffer processing in commit code
Jan Kara [Tue, 9 Jun 2009 23:26:26 +0000]
jbd: fix race in buffer processing in commit code

In commit code, we scan buffers attached to a transaction.  During this
scan, we sometimes have to drop j_list_lock and then we recheck whether
the journal buffer head didn't get freed by journal_try_to_free_buffers().
 But checking for buffer_jbd(bh) isn't enough because a new journal head
could get attached to our buffer head.  So add a check whether the journal
head remained the same and whether it's still at the same transaction and
list.

This is a nasty bug and can cause problems like memory corruption (use after
free) or trigger various assertions in JBD code (observed).

Signed-off-by: Jan Kara <jack@suse.cz>
Cc: <stable@kernel.org>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

10 years agoautofs4: remove hashed check in validate_wait()
Ian Kent [Tue, 9 Jun 2009 23:26:24 +0000]
autofs4: remove hashed check in validate_wait()

The recent ->lookup() deadlock correction required the directory inode
mutex to be dropped while waiting for expire completion.  We were
concerned about side effects from this change and one has been identified.

I saw several error messages.

They cause autofs to become quite confused and don't really point to the
actual problem.

Things like:

handle_packet_missing_direct:1376: can't find map entry for (43,1827932)

which is usually totally fatal (although in this case it wouldn't be
except that I treat is as such because it normally is).

do_mount_direct: direct trigger not valid or already mounted
/test/nested/g3c/s1/ss1

which is recoverable, however if this problem is at play it can cause
autofs to become quite confused as to the dependencies in the mount tree
because mount triggers end up mounted multiple times.  It's hard to
accurately check for this over mounting case and automount shouldn't need
to if the kernel module is doing its job.

There was one other message, similar in consequence of this last one but I
can't locate a log example just now.

When checking if a mount has already completed prior to adding a new mount
request to the wait queue we check if the dentry is hashed and, if so, if
it is a mount point.  But, if a mount successfully completed while we
slept on the wait queue mutex the dentry must exist for the mount to have
completed so the test is not really needed.

Mounts can also be done on top of a global root dentry, so for the above
case, where a mount request completes and the wait queue entry has already
been removed, the hashed test returning false can cause an incorrect
callback to the daemon.  Also, d_mountpoint() is not sufficient to check
if a mount has completed for the multi-mount case when we don't have a
real mount at the base of the tree.

Signed-off-by: Ian Kent <raven@themaw.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

10 years agoshm: fix unused warnings on nommu
Mike Frysinger [Tue, 9 Jun 2009 23:26:23 +0000]
shm: fix unused warnings on nommu

The massive nommu update (8feae131) resulted in these warnings:
ipc/shm.c: In function `sys_shmdt':
ipc/shm.c:974: warning: unused variable `size'
ipc/shm.c:972: warning: unused variable `next'

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

10 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus
Linus Torvalds [Tue, 9 Jun 2009 15:48:32 +0000]
Merge git://git./linux/kernel/git/rusty/linux-2.6-for-linus

* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
  kvm: fix kvm reboot crash when MAXSMP is used
  cpumask: alloc zeroed cpumask for static cpumask_var_ts
  cpumask: introduce zalloc_cpumask_var

10 years agoMerge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
Linus Torvalds [Tue, 9 Jun 2009 15:47:43 +0000]
Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block

* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
  bsg: setting rq->bio to NULL

10 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
Linus Torvalds [Tue, 9 Jun 2009 15:47:27 +0000]
Merge git://git./linux/kernel/git/davem/net-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
  cls_cgroup: Fix oops when user send improperly 'tc filter add' request
  r8169: fix crash when large packets are received

10 years agoMerge branch 'for-linus' of git://neil.brown.name/md
Linus Torvalds [Tue, 9 Jun 2009 15:41:22 +0000]
Merge branch 'for-linus' of git://neil.brown.name/md

* 'for-linus' of git://neil.brown.name/md:
  md/raid5: fix bug in reshape code when chunk_size decreases.
  md/raid5 - avoid deadlocks in get_active_stripe during reshape
  md/raid5: use conf->raid_disks in preference to mddev->raid_disk

10 years agobsg: setting rq->bio to NULL
FUJITA Tomonori [Tue, 9 Jun 2009 13:17:37 +0000]
bsg: setting rq->bio to NULL

Due to commit 1cd96c242a829d52f7a5ae98f554ca9775429685 ("block: WARN
in __blk_put_request() for potential bio leak"), BSG SMP requests get
the false warnings:

WARNING: at block/blk-core.c:1068 __blk_put_request+0x52/0xc0()

This sets rq->bio to NULL to avoid that false warnings.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

10 years agokvm: fix kvm reboot crash when MAXSMP is used
Avi Kivity [Sat, 6 Jun 2009 21:52:35 +0000]
kvm: fix kvm reboot crash when MAXSMP is used

one system was found there is crash during reboot then kvm/MAXSMP
Sending all processes the KILL signal...                              done
Please stand by while rebooting the system...
[ 1721.856538] md: stopping all md devices.
[ 1722.852139] kvm: exiting hardware virtualization
[ 1722.854601] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 1722.872219] IP: [<ffffffff8102c6b6>] hardware_disable+0x4c/0xb4
[ 1722.877955] PGD 0
[ 1722.880042] Oops: 0000 [#1] SMP
[ 1722.892548] last sysfs file: /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/host0/target0:2:0/0:2:0:0/vendor
[ 1722.900977] CPU 9
[ 1722.912606] Modules linked in:
[ 1722.914226] Pid: 0, comm: swapper Not tainted 2.6.30-rc7-tip-01843-g2305324-dirty #299 ...
[ 1722.932589] RIP: 0010:[<ffffffff8102c6b6>]  [<ffffffff8102c6b6>] hardware_disable+0x4c/0xb4
[ 1722.942709] RSP: 0018:ffffc900010b6ed8  EFLAGS: 00010046
[ 1722.956121] RAX: 0000000000000000 RBX: ffffc9000e253140 RCX: 0000000000000009
[ 1722.972202] RDX: 000000000000b020 RSI: ffffc900010c3220 RDI: ffffffffffffd790
[ 1722.977399] RBP: ffffc900010b6f08 R08: 0000000000000000 R09: 0000000000000000
[ 1722.995149] R10: 00000000000004b8 R11: 966912b6c78fddbd R12: 0000000000000009
[ 1723.011551] R13: 000000000000b020 R14: 0000000000000009 R15: 0000000000000000
[ 1723.019898] FS:  0000000000000000(0000) GS:ffffc900010b3000(0000) knlGS:0000000000000000
[ 1723.034389] CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
[ 1723.041164] CR2: 0000000000000000 CR3: 0000000001001000 CR4: 00000000000006e0
[ 1723.056192] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1723.072546] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 1723.080562] Process swapper (pid: 0, threadinfo ffff88107e464000, task ffff88047e5a2550)
[ 1723.096144] Stack:
[ 1723.099071]  0000000000000046 ffffc9000e253168 966912b6c78fddbd ffffc9000e253140
[ 1723.115471]  ffff880c7d4304d0 ffffc9000e253168 ffffc900010b6f28 ffffffff81011022
[ 1723.132428]  ffffc900010b6f48 966912b6c78fddbd ffffc900010b6f48 ffffffff8100b83b
[ 1723.141973] Call Trace:
[ 1723.142981]  <IRQ> <0> [<ffffffff81011022>] kvm_arch_hardware_disable+0x26/0x3c
[ 1723.158153]  [<ffffffff8100b83b>] hardware_disable+0x3f/0x55
[ 1723.172168]  [<ffffffff810b95f6>] generic_smp_call_function_interrupt+0x76/0x13c
[ 1723.178836]  [<ffffffff8104cbea>] smp_call_function_interrupt+0x3a/0x5e
[ 1723.194689]  [<ffffffff81035bf3>] call_function_interrupt+0x13/0x20
[ 1723.199750]  <EOI> <0> [<ffffffff814ad3b4>] ? acpi_idle_enter_c1+0xd3/0xf4
[ 1723.217508]  [<ffffffff814ad3ae>] ? acpi_idle_enter_c1+0xcd/0xf4
[ 1723.232172]  [<ffffffff814ad4bc>] ? acpi_idle_enter_bm+0xe7/0x2ce
[ 1723.235141]  [<ffffffff81a8d93f>] ? __atomic_notifier_call_chain+0x0/0xac
[ 1723.253381]  [<ffffffff818c3dff>] ? menu_select+0x58/0xd2
[ 1723.258179]  [<ffffffff818c2c9d>] ? cpuidle_idle_call+0xa4/0xf3
[ 1723.272828]  [<ffffffff81034085>] ? cpu_idle+0xb8/0x101
[ 1723.277085]  [<ffffffff81a80163>] ? start_secondary+0x1bc/0x1d7
[ 1723.293708] Code: b0 00 00 65 48 8b 04 25 28 00 00 00 48 89 45 e0 31 c0 48 8b 04 cd 30 ee 27 82 49 89 cc 49 89 d5 48 8b 04 10 48 8d b8 90 d7 ff ff <48> 8b 87 70 28 00 00 48 8d 98 90 d7 ff ff eb 16 e8 e9 fe ff ff
[ 1723.335524] RIP  [<ffffffff8102c6b6>] hardware_disable+0x4c/0xb4
[ 1723.342076]  RSP <ffffc900010b6ed8>
[ 1723.352021] CR2: 0000000000000000
[ 1723.354348] ---[ end trace e2aec53dae150aa1 ]---

it turns out that we need clear cpus_hardware_enabled in that case.

Reported-and-tested-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agocpumask: alloc zeroed cpumask for static cpumask_var_ts
Yinghai Lu [Sat, 6 Jun 2009 21:51:36 +0000]
cpumask: alloc zeroed cpumask for static cpumask_var_ts

These are defined as static cpumask_var_t so if MAXSMP is not used,
they are cleared already.  Avoid surprises when MAXSMP is enabled.

Signed-off-by: Yinghai Lu <yinghai.lu@kernel.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agocpumask: introduce zalloc_cpumask_var
Yinghai Lu [Sat, 6 Jun 2009 21:50:36 +0000]
cpumask: introduce zalloc_cpumask_var

So can get cpumask_var with cpumask_clear

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agocls_cgroup: Fix oops when user send improperly 'tc filter add' request
Minoru Usui [Tue, 9 Jun 2009 11:03:09 +0000]
cls_cgroup: Fix oops when user send improperly 'tc filter add' request

I found a bug in cls_cgroup_change() in cls_cgroup.c.
cls_cgroup_change() expected tca[TCA_OPTIONS] was set from user space properly,
but tc in iproute2-2.6.29-1 (which I used) didn't set it.

In the current source code of tc in git, it set tca[TCA_OPTIONS].

  git://git.kernel.org/pub/scm/linux/kernel/git/shemminger/iproute2.git

If we always use a newest iproute2 in git when we use cls_cgroup,
we don't face this oops probably.
But I think, kernel shouldn't panic regardless of use program's behaviour.

Signed-off-by: Minoru Usui <usui@mxm.nes.nec.co.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>

10 years agor8169: fix crash when large packets are received
Eric Dumazet [Tue, 9 Jun 2009 11:01:02 +0000]
r8169: fix crash when large packets are received

Michael Tokarev reported receiving a large packet could crash
a machine with RTL8169 NIC.
( original thread at http://lkml.org/lkml/2009/6/8/192 )

Problem is this driver tells that NIC frames up to 16383 bytes
can be received but provides skb to rx ring allocated with
smaller sizes (1536 bytes in case standard 1500 bytes MTU is used)

When a frame larger than what was allocated by driver is received,
dma transfert can occurs past the end of buffer and corrupt
kernel memory.

Fix is to tell to NIC what is the maximum size a frame can be.

This bug is very old, (before git introduction, linux-2.6.10), and
should be backported to stable versions.

Reported-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Tested-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>

10 years agomd/raid5: fix bug in reshape code when chunk_size decreases.
NeilBrown [Tue, 9 Jun 2009 06:32:22 +0000]
md/raid5: fix bug in reshape code when chunk_size decreases.

Now that we support changing the chunksize, we calculate
"reshape_sectors" to be the max of number of sectors in old
and new chunk size.
However there is one please where we still use 'chunksize'
rather than 'reshape_sectors'.
This causes a reshape that reduces the size of chunks to freeze.

Signed-off-by: NeilBrown <neilb@suse.de>

10 years agomd/raid5 - avoid deadlocks in get_active_stripe during reshape
NeilBrown [Tue, 9 Jun 2009 04:39:59 +0000]
md/raid5 - avoid deadlocks in get_active_stripe during reshape

md has functionality to 'quiesce' and array so that all pending
IO completed and no new IO starts.  This is used to achieve a
stable state before making internal changes.

Currently this quiescing applies equally to normal IO, resync
IO, and reshape IO.
However there is a problem with applying it to reshape IO.
Reshape can have multiple 'stripe_heads' that must be active together.
If the quiesce come between allocating the first and the last of
such a collection, then we deadlock, as the last will not be allocated
until the quiesce is lifted, the quiesce will not be lifted until the
first (which has been allocated) gets used, and that first cannot be
used until the last is allocated.

It is not necessary to inhibit reshape IO when a quiesce is
requested.  Those places in the code that require a full quiesce will
ensure the reshape thread is not running at all.

So allow reshape requests to get access to new stripe_heads without
being blocked by a 'quiesce'.

This only affects in-place reshapes (i.e. where the array does not
grow or shrink) and these are only newly supported.  So this patch is
not needed in earlier kernels.

Signed-off-by: NeilBrown <neilb@suse.de>

10 years agomd/raid5: use conf->raid_disks in preference to mddev->raid_disk
NeilBrown [Tue, 9 Jun 2009 04:30:31 +0000]
md/raid5: use conf->raid_disks in preference to mddev->raid_disk

mddev->raid_disks can be changed and any time by a request from
user-space.  It is a suggestion as to what number of raid_disks is
desired.

conf->raid_disks can only be changed by the raid5 module with suitable
locks in place.  It is a statement as to the current number of
raid_disks.

There are two places where the latter should be used, but the former
is used.  This can lead to a crash when reshaping an array.

This patch changes to mddev-> to conf->

Signed-off-by: NeilBrown <neilb@suse.de>

10 years agoasync: Fix lack of boot-time console due to insufficient synchronization
Linus Torvalds [Mon, 8 Jun 2009 19:31:53 +0000]
async: Fix lack of boot-time console due to insufficient synchronization

Our async work synchronization was broken by "async: make sure
independent async domains can't accidentally entangle" (commit
d5a877e8dd409d8c702986d06485c374b705d340), because it would report
the wrong lowest active async ID when there was both running and
pending async work.

This caused things like no being able to read the root filesystem,
resulting in missing console devices and inability to run 'init',
causing a boot-time panic.

This fixes it by properly returning the lowest pending async ID: if
there is any running async work, that will have a lower ID than any
pending work, and we should _not_ look at the pending work list.

There were alternative patches from Jaswinder and James, but this one
also cleans up the code by removing the pointless 'ret' variable and
the unnecesary testing for an empty list around 'for_each_entry()' (if
the list is empty, the for_each_entry() thing just won't execute).

Fixes-bug: http://bugzilla.kernel.org/show_bug.cgi?id=13474
Reported-and-tested-by: Chris Clayton <chris2553@googlemail.com>
Cc: Jaswinder Singh Rajput <jaswinder@kernel.org>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

10 years agoMerge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
Linus Torvalds [Mon, 8 Jun 2009 16:22:53 +0000]
Merge branch 'upstream' of git://ftp.linux-mips.org/upstream-linus

* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
  MIPS: Outline udelay and fix a few issues.
  MIPS: ioctl.h: Fix headers_check warnings
  MIPS: Cobalt: PCI bus is always required to obtain the board ID
  MIPS: Kconfig: Remove "Support for" from Cavium system type
  MIPS: Sibyte: Honor CONFIG_CMDLINE
  SSB: BCM47xx: Export ssb_watchdog_timer_set

10 years agopata_netcell: Fix typo
Alan Cox [Mon, 8 Jun 2009 11:31:00 +0000]
pata_netcell: Fix typo

The previous patch submission had a I typo I didn't catch but Bartlomiej
noted. Guess this proves the point about any patch being risky late in an rc

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

10 years agoMerge branch 'kvm-updates/2.6.30' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Mon, 8 Jun 2009 16:05:48 +0000]
Merge branch 'kvm-updates/2.6.30' of git://git./virt/kvm/kvm

* 'kvm-updates/2.6.30' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: Explicity initialize cpus_hardware_enabled

10 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6
Linus Torvalds [Mon, 8 Jun 2009 16:04:55 +0000]
Merge branch 'for-linus' of git://git./linux/kernel/git/bart/ide-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6:
  pdc202xx_old: fix resetproc() method
  pdc202xx_old: fix 'pdc20246_dma_ops'

10 years agoMIPS: Outline udelay and fix a few issues.
Ralf Baechle [Sat, 28 Feb 2009 09:44:28 +0000]
MIPS: Outline udelay and fix a few issues.

Outlining fixes the issue were on certain CPUs such as the R10000 family
the delay loop would need an extra cycle if it overlaps a cacheline
boundary.

The rewrite also fixes build errors with GCC 4.4 which was changed in
way incompatible with the kernel's inline assembly.

Relying on pure C for computation of the delay value removes the need for
explicit.  The price we pay is a slight slowdown of the computation - to
be fixed on another day.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

10 years agoMIPS: ioctl.h: Fix headers_check warnings
Jaswinder Singh Rajput [Thu, 4 Jun 2009 12:35:49 +0000]
MIPS: ioctl.h: Fix headers_check warnings

Make ioctl.h compatible with asm-generic/ioctl.h and userspace

fix the following 'make headers_check' warning:

  usr/include/asm-mips/ioctl.h:64: extern's make no sense in userspace

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

10 years agoMIPS: Cobalt: PCI bus is always required to obtain the board ID
Yoichi Yuasa [Tue, 2 Jun 2009 14:17:07 +0000]
MIPS: Cobalt: PCI bus is always required to obtain the board ID

Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

10 years agoMIPS: Kconfig: Remove "Support for" from Cavium system type
Yoichi Yuasa [Tue, 2 Jun 2009 14:15:10 +0000]
MIPS: Kconfig: Remove "Support for" from Cavium system type

Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Acked-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

10 years agoMIPS: Sibyte: Honor CONFIG_CMDLINE
Ralf Baechle [Tue, 2 Jun 2009 18:05:28 +0000]
MIPS: Sibyte: Honor CONFIG_CMDLINE

Original patch by Imre Kaloz <kaloz@openwrt.org>.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

10 years agoSSB: BCM47xx: Export ssb_watchdog_timer_set
Matthieu Castet [Fri, 22 May 2009 20:25:04 +0000]
SSB: BCM47xx: Export ssb_watchdog_timer_set

this patch export ssb_watchdog_timer_set to allow to use it in a Linux
watchdog driver.

Signed-off-by: Matthieu CASTET <castet.matthieu@free.fr>
Acked-by : Michael Buesch <mb@bu3sch.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

10 years agoMerge master.kernel.org:/home/rmk/linux-2.6-arm
Linus Torvalds [Mon, 8 Jun 2009 15:29:31 +0000]
Merge master.kernel.org:/home/rmk/linux-2.6-arm

* master.kernel.org:/home/rmk/linux-2.6-arm:
  [ARM] 5543/1: arm: serial amba: add missing declaration in serial.h
  [ARM] pxa: fix pxa27x_udc default pullup GPIO
  [ARM] pxa/imote2: fix UCAM sensor board ADC model number
  mx[23]: don't put clock lookups in __initdata
  fix oops when using console=ttymxcN with N > 0
  [ARM] ARMv7 errata: only apply fixes when running on applicable CPU
  [ARM] 5534/1: kmalloc must return a cache line aligned buffer

10 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc
Linus Torvalds [Mon, 8 Jun 2009 14:53:59 +0000]
Merge branch 'for-linus' of git://git./linux/kernel/git/drzeus/mmc

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc:
  sdhci-of: Fix the wrong accessor to HOSTVER register
  mvsdio: fix config failure with some high speed SDHC cards
  mvsdio: ignore high speed timing requests from the core
  mmc/omap: Use disable_irq_nosync() from within irq handlers.
  sdhci-of: Add fsl,esdhc as a valid compatible to bind against
  mvsdio: allow automatic loading when modular
  mxcmmc: Fix missing return value checking in DMA setup code.
  mxcmmc : Reset the SDHC hardware if software timeout occurs.
  omap_hsmmc: Trivial fix for a typo in comment
  mxcmmc: decrease minimum frequency to make MMC cards work

10 years agoKVM: Explicity initialize cpus_hardware_enabled
Avi Kivity [Sat, 6 Jun 2009 09:34:39 +0000]
KVM: Explicity initialize cpus_hardware_enabled

Under CONFIG_MAXSMP, cpus_hardware_enabled is allocated from the heap and
not statically initialized.  This causes a crash on reboot when kvm thinks
vmx is enabled on random nonexistent cpus and accesses nonexistent percpu
lists.

Fix by explicitly clearing the variable.

Cc: stable@kernel.org
Reported-and-tested-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Avi Kivity <avi@redhat.com>

10 years ago[ARM] 5543/1: arm: serial amba: add missing declaration in serial.h
Alessandro Rubini [Sat, 6 Jun 2009 09:17:57 +0000]
[ARM] 5543/1: arm: serial amba: add missing declaration in serial.h

This header is sometimes included in the uncompress stage to get
register values, but no <linux/amba/bus.h> can be included there.
So declare "struct amba_device" here before using it in a prototype.

Signed-off-by: Alessandro Rubini <rubini@unipv.it>
Acked-by: Andrea Gallo <andrea.gallo@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

10 years agopdc202xx_old: fix resetproc() method
Sergei Shtylyov [Sun, 7 Jun 2009 11:52:50 +0000]
pdc202xx_old: fix resetproc() method

pdc202xx_reset() calls pdc202xx_reset_host() twice, for both channels, while
that function actually twiddles the single, shared software reset bit -- the
net effect is a duplicated reset and horrendous 4 second delay happening not
only on a channel reset but also when dma_lost_irq() and dma_clear() methods
are called.  Fold pdc202xx_reset_host() into pdc202xx_reset(), fix printk(),
and move it before the actual reset...

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

10 years agopdc202xx_old: fix 'pdc20246_dma_ops'
Sergei Shtylyov [Sun, 7 Jun 2009 11:52:50 +0000]
pdc202xx_old: fix 'pdc20246_dma_ops'

Commit ac95beedf8bc97b24f9540d4da9952f07221c023 (ide: add struct ide_port_ops
(take 2)) erroneously converted the driver's dma_timeout() and dma_lost_irq()
methods to call the driver's resetproc() method regardless of whether it was
defined for this specific controller while it hadn't been defined and hence
called for PDC20246. So the dma_clear() method, the successor of dma_timeout(),
shouldn't exist and the dma_lost_irq() method should be standard for PDC20246.

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

10 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes...
Linus Torvalds [Sat, 6 Jun 2009 21:33:54 +0000]
Merge branch 'for-linus' of git://git./linux/kernel/git/jbarnes/pci-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6:
  x86/pci: fix mmconfig detection with 32bit near 4g
  PCI: use fixed-up device class when configuring device

10 years agointegrity: fix IMA inode leak
Hugh Dickins [Sat, 6 Jun 2009 20:18:09 +0000]
integrity: fix IMA inode leak

CONFIG_IMA=y inode activity leaks iint_cache and radix_tree_node objects
until the system runs out of memory.  Nowhere is calling ima_inode_free()
a.k.a. ima_iint_delete().  Fix that by calling it from destroy_inode().

Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

10 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
Linus Torvalds [Sat, 6 Jun 2009 19:18:14 +0000]
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6:
  ext3/4 with synchronous writes gets wedged by Postfix
  Fix nobh_truncate_page() to not pass stack garbage to get_block()

10 years agoMerge branch 'upstream-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarz...
Linus Torvalds [Sat, 6 Jun 2009 19:17:03 +0000]
Merge branch 'upstream-linus2' of git://git./linux/kernel/git/jgarzik/libata-dev

* 'upstream-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
  [libata] pata_ali: Use IGN_SIMPLEX

10 years agoext3/4 with synchronous writes gets wedged by Postfix
Al Viro [Wed, 13 May 2009 18:13:40 +0000]
ext3/4 with synchronous writes gets wedged by Postfix

OK, that's probably the easiest way to do that, as much as I don't like it...
Since iget() et.al. will not accept I_FREEING (will wait to go away
and restart), and since we'd better have serialization between new/free
on fs data structures anyway, we can afford simply skipping I_FREEING
et.al. in insert_inode_locked().

We do that from new_inode, so it won't race with free_inode in any interesting
ways and it won't race with iget (of any origin; nfsd or in case of fs
corruption a lookup) since both still will wait for I_LOCK.

Reviewed-by: "Theodore Ts'o" <tytso@mit.edu>
Acked-by: Jan Kara <jack@suse.cz>
Tested-by: David Watson <dbwatson@ukfsn.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

10 years agoFix nobh_truncate_page() to not pass stack garbage to get_block()
Theodore Ts'o [Tue, 12 May 2009 11:37:56 +0000]
Fix nobh_truncate_page() to not pass stack garbage to get_block()

The nobh_truncate_page() function is used by ext2, exofs, and jfs.  Of
these three, only ext2 and jfs's get_block() function pays attention
to bh->b_size --- which is normally always the filesystem blocksize
except when the get_block() function is called by either
mpage_readpage(), mpage_readpages(), or the direct I/O routines in
fs/direct_io.c.

Unfortunately, nobh_truncate_page() does not initialize map_bh before
calling the filesystem-supplied get_block() function.  So ext2 and jfs
will try to calculate the number of blocks to map by taking stack
garbage and shifting it left by inode->i_blkbits.  This should be
*mostly* harmless (except the filesystem will do some unnneeded work)
unless the stack garbage is less than filesystem's blocksize, in which
case maxblocks will be zero, and the attempt to find out whether or
not the filesystem has a hole at a given logical block will fail, and
the page cache entry might not get zero'ed out.

Also if the stack garbage in in map_bh->state happens to have the
BH_Mapped bit set, there could be an attempt to call readpage() on a
non-existent page, which could cause nobh_truncate_page() to return an
error when it should not.

Fix this by initializing map_bh->state and map_bh->size.

Fortunately, it's probably fairly unlikely that ext2 and jfs users
mount with nobh these days.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

10 years ago[libata] pata_ali: Use IGN_SIMPLEX
Alan Cox [Wed, 13 May 2009 14:02:27 +0000]
[libata] pata_ali: Use IGN_SIMPLEX

Some ALi devices report simplex if they have been disabled and re-enabled, and
restoring the byte does not work. Ignore it - the needed supporting logic is
already present for the SATA ULi ports.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

10 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable
Linus Torvalds [Fri, 5 Jun 2009 18:54:28 +0000]
Merge git://git./linux/kernel/git/mason/btrfs-unstable

* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable:
  Btrfs: Fix oops and use after free during space balancing
  Btrfs: set device->total_disk_bytes when adding new device

10 years agomtd: davinci nand: update clock naming
Kevin Hilman [Fri, 5 Jun 2009 17:48:08 +0000]
mtd: davinci nand: update clock naming

DaVinci clock support has been updated in mainline.
Update clock names accordingly.

Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

10 years agoMerge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzi...
Linus Torvalds [Fri, 5 Jun 2009 18:53:44 +0000]
Merge branch 'upstream-linus' of git://git./linux/kernel/git/jgarzik/libata-dev

* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
  ata_piix: Add HP Compaq nc6000 to the broken poweroff list
  ahci: add warning messages for hp laptops with broken suspend
  pata_efar: fix PIO2 underclocking
  pata_legacy: wait for async probing

10 years agoata_piix: Add HP Compaq nc6000 to the broken poweroff list
Ville Syrjala [Mon, 18 May 2009 22:37:44 +0000]
ata_piix: Add HP Compaq nc6000 to the broken poweroff list

HP Compaq nc6000 suffers from the double disk spindown issue.
Add it to the broken poweroff DMI list.

Signed-off-by: Ville Syrjala <syrjala@sci.fi>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

10 years agoahci: add warning messages for hp laptops with broken suspend
Tejun Heo [Sat, 30 May 2009 11:50:12 +0000]
ahci: add warning messages for hp laptops with broken suspend

Harddisks on HP dv[4-6] and HDX18 fail to come online after resume on
earlier BIOSen.  Fortunately, HP recently released BIOS updates for
all machines to fix the issue.  Detect old BIOSen, warn the user to
update BIOS on boot and suspend attempts and fail suspend.

Kudos to all the bug reporters.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: kernel.org@epperson.homelinux.net
Cc: emisca@gmail.com
Cc: Gadi Cohen <dragon@wastelands.net>
Cc: Paul Swanson <paul@procursa.com>
Cc: s@ourada.org
Cc: Trevor Davenport <trevor.davenport@gmail.com>
Cc: corruptor1972 <steven_tierney@yahoo.co.uk>
Cc: Victoria Wilson <mail@vwilson.co.uk>
Cc: khiraly <khiraly.list@gmail.com>
Cc: Sean <wollombi@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

10 years agopata_efar: fix PIO2 underclocking
Sergei Shtylyov [Mon, 1 Jun 2009 19:42:10 +0000]
pata_efar: fix PIO2 underclocking

Fix the PIO mode 2 using mode 0 timings -- this driver should enable the
fast timing bank starting with PIO2, just like the PIIX/ICH drivers do.
Also, fix/rephrase some comments while at it.

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

10 years agopata_legacy: wait for async probing
James Bottomley [Fri, 5 Jun 2009 14:41:39 +0000]
pata_legacy: wait for async probing

The basic problem here that pata_legacy attaches the host, sees if it found
any devices and detaches it if none were found.  With async probing, it's not
waiting until discovery is finished before deciding it has no devices and
trying the detach leading to this warning:

ata1: PATA max PIO4 cmd 0x1f0 ctl 0x3f6 irq 14
------------[ cut here ]------------
WARNING: at drivers/ata/libata-core.c:6222 ata_host_detach+0x75/0x90()
Modules linked in:
Pid: 1, comm: swapper Not tainted 2.6.30-rc7 #1
Call Trace:
 [<c01fbb05>] ? ata_host_detach+0x75/0x90
 [<c01fbb05>] ? ata_host_detach+0x75/0x90
 [<c01139b5>] ? warn_slowpath_common+0x45/0x80
 [<c01139fa>] ? warn_slowpath_null+0xa/0x10
 [<c01fbb05>] ? ata_host_detach+0x75/0x90
 [<c02f40e0>] ? legacy_init+0x44e/0x87f
 [<c02f3c92>] ? legacy_init+0x0/0x87f
 [<c0101021>] ? _stext+0x21/0x140
 [<c01890ff>] ? proc_register+0x2f/0x190
 [<c018938c>] ? create_proc_entry+0x5c/0xc0
 [<c0135ebe>] ? register_irq_proc+0x6e/0x90
 [<c02e6484>] ? kernel_init+0x6e/0xbf
 [<c02e6416>] ? kernel_init+0x0/0xbf
 [<c01031d7>] ? kernel_thread_helper+0x7/0x10
---[ end trace ef1ee36e873ae3a0 ]---

Because it detaches before the probe is complete.

One way to fix it would be to put an async_synchronize_full() before looking
for devices, which this patch does.  A better way might be to separate libata
into its own domain and only wait for that.

Reported-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

10 years agoMerge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq
Linus Torvalds [Fri, 5 Jun 2009 17:46:48 +0000]
Merge branch 'fixes' of git://git./linux/kernel/git/davej/cpufreq

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq:
  [CPUFREQ] powernow-k8: check space_id of _PCT registers to be FFH

10 years ago[CPUFREQ] powernow-k8: check space_id of _PCT registers to be FFH
Dave Jones [Fri, 5 Jun 2009 16:37:07 +0000]
[CPUFREQ] powernow-k8: check space_id of _PCT registers to be FFH

The powernow-k8 driver checks to see that the Performance Control/Status
Registers are declared as FFH (functional fixed hardware) by the BIOS.
However, this check got broken in the commit:
 0e64a0c982c06a6b8f5e2a7f29eb108fdf257b2f
 [CPUFREQ] checkpatch cleanups for powernow-k8

Fix based on an original patch from Naga Chumbalkar.

Signed-off-by: Naga Chumbalkar <nagananda.chumbalkar@hp.com>
Cc: Mark Langsdorf <mark.langsdorf@amd.com>
Signed-off-by: Dave Jones <davej@redhat.com>

10 years agoRevert "drm: don't associate _DRM_DRIVER maps with a master"
Linus Torvalds [Fri, 5 Jun 2009 17:21:52 +0000]
Revert "drm: don't associate _DRM_DRIVER maps with a master"

This reverts commit 6c51d1cfa0a370b48a157163340190cf5fd2346b, which
apparently causes DRI initialization failures on Radeons.

Reported-by: Markus Trippelsdorf <markus@trippelsdorf.de>
Requested-by: Dave Airlie <airlied@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

10 years agoivtv: Fix PCI DMA direction
Alan Cox [Fri, 5 Jun 2009 10:56:18 +0000]
ivtv: Fix PCI DMA direction

The ivtv stream buffers may be for receive or for send but the attached
sg handle is always destined cpu->device.  We flush it correctly but the
allocation is wrongly done with the same type as the buffers.

See bug: http://bugzilla.kernel.org/show_bug.cgi?id=13385

(Note this doesn't close the bug - it fixes the ivtv part and in turn
the logging next shows up some rather alarming DMA sg list warnings in
libata)

Signed-off-by: Alan Cox <alan@linux.intel.com>
Acked-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

10 years agoptrace: revert "ptrace_detach: the wrong wakeup breaks the ERESTARTxxx logic"
Oleg Nesterov [Thu, 4 Jun 2009 23:29:09 +0000]
ptrace: revert "ptrace_detach: the wrong wakeup breaks the ERESTARTxxx logic"

Commit 95a3540da9c81a5987be810e1d9a83640a366bd5 ("ptrace_detach: the wrong
wakeup breaks the ERESTARTxxx logic") removed the "extra"
wake_up_process() from ptrace_detach(), but as Jan pointed out this breaks
the compatibility.

I believe the changelog is right and this wake_up() is wrong in many
ways, but GDB assumes that ptrace(PTRACE_DETACH, child, 0, 0) always
wakes up the tracee.

Despite the fact this breaks SIGNAL_STOP_STOPPED/group_stop_count logic,
and despite the fact this wake_up_process() can break another
assumption: PTRACE_DETACH with SIGSTOP should leave the tracee in
TASK_STOPPED case.  Because the untraced child can dequeue SIGSTOP and
call do_signal_stop() before ptrace_detach() calls wake_up_process().

Revert this change for now.  We need some fixes even if we we want to keep
the current behaviour, but these fixes are not for 2.6.30.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Roland McGrath <roland@redhat.com>
Cc: Jan Kratochvil <jan.kratochvil@redhat.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

10 years agokbuild: fix detection of CONFIG_FRAME_WARN=0
Mike Frysinger [Thu, 4 Jun 2009 23:29:08 +0000]
kbuild: fix detection of CONFIG_FRAME_WARN=0

The checking of CONFIG_FRAME_WARN in the top level Makefile forgot to
actually derefence the variable thus leading to an always true check.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Cc: Andi Kleen <ak@suse.de>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

10 years agoptrace: tracehook_report_clone: fix false positives
Oleg Nesterov [Thu, 4 Jun 2009 23:29:07 +0000]
ptrace: tracehook_report_clone: fix false positives

The "trace || CLONE_PTRACE" check in tracehook_report_clone() is not right,

- If the untraced task does clone(CLONE_PTRACE) the new child is not traced,
  we must not queue SIGSTOP.

- If we forked the traced task, but the tracer exits and untraces both the
  forking task and the new child (after copy_process() drops tasklist_lock),
  we should not queue SIGSTOP too.

Change the code to check task_ptrace() != 0 instead. This is still racy, but
the race is harmless.

We can race with another tracer attaching to this child, or the tracer can
exit and detach in parallel. But giwen that we didn't do wake_up_new_task()
yet, the child must have the pending SIGSTOP anyway.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Roland McGrath <roland@redhat.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

10 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/anholt...
Linus Torvalds [Thu, 4 Jun 2009 22:23:51 +0000]
Merge branch 'for-linus' of git://git./linux/kernel/git/anholt/drm-intel

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/anholt/drm-intel:
  drm/i915: Remove a bad BUG_ON in the fence management code.

10 years agoMerge branch 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied...
Linus Torvalds [Thu, 4 Jun 2009 22:23:39 +0000]
Merge branch 'drm-fixes' of git://git./linux/kernel/git/airlied/drm-2.6

* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
  drm: ignore EDID with really tiny modes.
  drm: don't associate _DRM_DRIVER maps with a master
  drm/i915: intel_lvds.c fix section mismatch
  drm: Hook up DPMS property handling in drm_crtc.c. Add drm_helper_connector_dpms.
  drm: set permissions on edid file to 0444
  drm: add newlines to text sysfs files
  drm/radeon: fix ring free alignment calculations
  drm: fix irq naming for kms drivers.

10 years agodrivers/char/mem.c: avoid OOM lockup during large reads from /dev/zero
Salman Qazi [Thu, 4 Jun 2009 22:20:39 +0000]
drivers/char/mem.c: avoid OOM lockup during large reads from /dev/zero

While running 20 parallel instances of dd as follows:

  #!/bin/bash
  for i in `seq 1 20`; do
           dd if=/dev/zero of=/export/hda3/dd_$i bs=1073741824 count=1 &
  done
  wait

on a 16G machine, we noticed that rather than just killing the processes,
the entire kernel went down.  Stracing dd reveals that it first does an
mmap2, which makes 1GB worth of zero page mappings.  Then it performs a
read on those pages from /dev/zero, and finally it performs a write.

The machine died during the reads.  Looking at the code, it was noticed
that /dev/zero's read operation had been changed by
557ed1fa2620dc119adb86b34c614e152a629a80 ("remove ZERO_PAGE") from giving
zero page mappings to actually zeroing the page.

The zeroing of the pages causes physical pages to be allocated to the
process.  But, when the process exhausts all the memory that it can, the
kernel cannot kill it, as it is still in the kernel mode allocating more
memory.  Consequently, the kernel eventually crashes.

To fix this, I propose that when a fatal signal is pending during
/dev/zero read operation, we simply return and let the user process die.

Signed-off-by: Salman Qazi <sqazi@google.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
[ Modified error return and comment trivially.  - Linus]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

10 years agoBtrfs: Fix oops and use after free during space balancing
Chris Mason [Thu, 4 Jun 2009 19:34:51 +0000]
Btrfs: Fix oops and use after free during space balancing

The btrfs allocator uses list_for_each to walk the available block
groups when searching for free blocks.  It starts off with a hint
to help find the best block group for a given allocation.

The hint is resolved into a block group, but we don't properly check
to make sure the block group we find isn't in the middle of being
freed due to filesystem shrinking or balancing.  If it is being
freed, the list pointers in it are bogus and can't be trusted.  But,
the code happily goes along and uses them in the list_for_each loop,
leading to all kinds of fun.

The fix used here is to check to make sure the block group we find really
is on the list before we use it.  list_del_init is used when removing
it from the list, so we can do a proper check.

The allocation clustering code has a similar bug where it will trust
the block group in the current free space cluster.  If our allocation
flags have changed (going from single spindle dup to raid1 for example)
because the drives in the FS have changed, we're not allowed to use
the old block group any more.

The fix used here is to check the current cluster against the
current allocation flags.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

10 years agolguest: fix 'unhandled trap 13' with CONFIG_CC_STACKPROTECTOR
Rusty Russell [Wed, 3 Jun 2009 05:22:24 +0000]
lguest: fix 'unhandled trap 13' with CONFIG_CC_STACKPROTECTOR

We don't set up the canary; let's disable stack protector on boot.c so
we can get into lguest_init, then set it up.  As a side effect,
switch_to_new_gdt() sets up %fs for us properly too.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

10 years agoMerge branch 'fix' of git://git.kernel.org/pub/scm/linux/kernel/git/ycmiao/pxa-linux-2.6
Russell King [Thu, 4 Jun 2009 16:02:58 +0000]
Merge branch 'fix' of git://git./linux/kernel/git/ycmiao/pxa-linux-2.6

10 years agoBtrfs: set device->total_disk_bytes when adding new device
Yan Zheng [Thu, 4 Jun 2009 13:23:50 +0000]
Btrfs: set device->total_disk_bytes when adding new device

It was not being properly initialized, and so the size saved to
disk was not correct.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

10 years agodrm/i915: Remove a bad BUG_ON in the fence management code.
Eric Anholt [Thu, 4 Jun 2009 11:18:14 +0000]
drm/i915: Remove a bad BUG_ON in the fence management code.

This could be triggered by a gtt mapping fault on 965 that decides to
remove the fence from another object that happens to be active currently.
Since the other object doesn't rely on the fence reg for its execution, we
don't wait for it to finish.  We'll soon be not waiting on 915 most of the
time as well, so just drop the BUG_ON.

Signed-off-by: Eric Anholt <eric@anholt.net>

10 years agoMerge branch 'for-rmk' of git://git.pengutronix.de/git/imx/linux-2.6
Russell King [Thu, 4 Jun 2009 11:27:18 +0000]
Merge branch 'for-rmk' of git://git.pengutronix.de/git/imx/linux-2.6

10 years agox86/pci: fix mmconfig detection with 32bit near 4g
Yinghai Lu [Wed, 3 Jun 2009 07:13:13 +0000]
x86/pci: fix mmconfig detection with 32bit near 4g

Pascal reported and bisected a commit:
| x86/PCI: don't call e820_all_mapped with -1 in the mmconfig case

which broke one system system.

ACPI: Using IOAPIC for interrupt routing
PCI: MCFG configuration 0: base f0000000 segment 0 buses 0 - 255
PCI: MCFG area at f0000000 reserved in ACPI motherboard resources
PCI: Using MMCONFIG for extended config space

it didn't have
PCI: updated MCFG configuration 0: base f0000000 segment 0 buses 0 - 63
anymore, and try to use 0xf000000 - 0xffffffff for mmconfig

For 32bit, mcfg_res->end could be 32bit only (if 64 resources aren't used)
So use end - 1 to pass the value in mcfg->end to avoid overflow.

We don't need to worry about the e820 path, they are always 64 bit.

Reported-by: Pascal Terjan <pterjan@mandriva.com>
Bisected-by: Pascal Terjan <pterjan@mandriva.com>
Tested-by: Pascal Terjan <pterjan@mandriva.com>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: stable@kernel.org
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

10 years agoPCI: use fixed-up device class when configuring device
Yu Zhao [Wed, 27 May 2009 16:25:05 +0000]
PCI: use fixed-up device class when configuring device

The device class may be changed after the fixup, so re-read the class
value from pci_dev when configuring the device.  Otherwise some devices
such as JMicron SATA controller won't work.

Reviewed-by: Matthew Wilcox <willy@linux.intel.com>
Reviewed-by: Grant Grundler <grundler@parisc-linux.org>
Tested-by: Marc Dionne <marc.c.dionne@gmail.com>
Signed-off-by: Yu Zhao <yu.zhao@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

10 years ago[ARM] pxa: fix pxa27x_udc default pullup GPIO
Philipp Zabel [Tue, 26 May 2009 20:03:32 +0000]
[ARM] pxa: fix pxa27x_udc default pullup GPIO

Currently, pxa27x_udc tries to use GPIO 0 as D+ pullup if not
explicitly configured. Default to an invalid GPIO (-1) instead.

Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Eric Miao <eric.miao@marvell.com>

10 years ago[ARM] pxa/imote2: fix UCAM sensor board ADC model number
Jonathan Cameron [Mon, 25 May 2009 16:50:10 +0000]
[ARM] pxa/imote2: fix UCAM sensor board ADC model number

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Eric Miao <eric.miao@marvell.com>

10 years agodrm: ignore EDID with really tiny modes.
Adam Jackson [Thu, 4 Jun 2009 00:20:34 +0000]
drm: ignore EDID with really tiny modes.

Some EDIDs lie and report tiny modes that aren't possible. Ignore
these modes.

Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

10 years agodrm: don't associate _DRM_DRIVER maps with a master
Ben Skeggs [Tue, 26 May 2009 00:35:52 +0000]
drm: don't associate _DRM_DRIVER maps with a master

A driver will use the _DRM_DRIVER map flag to indicate that it wants
to be responsible for removing the map itself, bypassing the DRM's
automagic cleanup code.

Since the multi-master changes this has been broken, resulting in some
drivers having their registers unmapped before it's finished with them.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

10 years agodrm/i915: intel_lvds.c fix section mismatch
Jaswinder Singh Rajput [Wed, 3 Jun 2009 23:41:19 +0000]
drm/i915: intel_lvds.c fix section mismatch

intel_no_lvds[] does not require __initdata as it is used only by

void intel_lvds_init(struct drm_device *dev).

Signed-off-by: Jaswinder Singh Rajput <jaswinder@kernel.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>

10 years agodrm: Hook up DPMS property handling in drm_crtc.c. Add drm_helper_connector_dpms.
Keith Packard [Sun, 31 May 2009 03:42:28 +0000]
drm: Hook up DPMS property handling in drm_crtc.c. Add drm_helper_connector_dpms.

Making the drm_crtc.c code recognize the DPMS property and invoke the
connector->dpms function doesn't remove any capability from the driver while
reducing code duplication.

That just highlighted the problem with the existing DPMS functions which
could turn off the connector, but failed to turn off any relevant crtcs. The
new drm_helper_connector_dpms function manages all of that, using the
drm_helper-specific crtc and encoder dpms functions, automatically computing
the appropriate DPMS level for each object in the system.

This fixes the current troubles in the i915 driver which left PLLs, pipes
and planes running while in DPMS_OFF mode or even while they were unused.

Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

10 years agodrm: set permissions on edid file to 0444
Keith Packard [Sun, 31 May 2009 03:42:26 +0000]
drm: set permissions on edid file to 0444

Without initializing the sysfs attributes for the edid file,
it was created with mode 0, making it difficult for applications to use.

Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

10 years agodrm: add newlines to text sysfs files
Keith Packard [Sun, 31 May 2009 03:42:25 +0000]
drm: add newlines to text sysfs files

The contents of various simple text files in sysfs should end with
a newline to make them easier to read from the console.

Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

10 years agodrm/radeon: fix ring free alignment calculations
Dave Airlie [Wed, 3 Jun 2009 21:08:13 +0000]
drm/radeon: fix ring free alignment calculations

fd.o bz#21849

We were aligning to +16 dwords, instead of to the next 16dword
boundary in the ring. Fix the calculation to go to the next 16dword
boundary when space checking.

Signed-off-by: Dave Airlie <airlied@redhat.com>

10 years agodrm: fix irq naming for kms drivers.
Dave Airlie [Tue, 2 Jun 2009 06:50:35 +0000]
drm: fix irq naming for kms drivers.

allocating devname in the i915 driver was a hack originally and I
forgot to figure out how to do this properly back then.

So this is the cleaner version that just picks devname or driver name
in the irq code.

It removes the devname allocs from the i915 driver.

Signed-off-by: Dave Airlie <airlied@redhat.com>

10 years agosdhci-of: Fix the wrong accessor to HOSTVER register
Dave Liu [Wed, 6 May 2009 10:40:07 +0000]
sdhci-of: Fix the wrong accessor to HOSTVER register

Freescale eSDHC controller has the special order for
the HOST version register. that is not same as the other's
registers. The address of HOSTVER in spec is 0xFE, and
we need use the in_be16(0xFE) to access it, not in_be16(0xFC).

Signed-off-by: Dave Liu <daveliu@freescale.com>
Acked-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>

10 years agomvsdio: fix config failure with some high speed SDHC cards
Nicolas Pitre [Wed, 27 May 2009 02:35:34 +0000]
mvsdio: fix config failure with some high speed SDHC cards

Especially with Sandisk SDHC cards, the second SWITCH command was failing
with a timeout and the card was not recognized at all.  However if the
system was busy, or debugging was enabled, or a udelay(100) was inserted
before the second SWITCH command in the core code, then the timing was
so that the card started to work.

With some unusual block sizes, the data FIFO status doesn't indicate a
"empty" state right away when the data transfer is done.  Queuing
another data transfer in that condition results in a transfer timeout.

The empty FIFO bit eventually get set by itself in less than 50 usecs
when it is not set right away. So let's just poll for that bit before
configuring the controller with a new data transfer.

Signed-off-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>

10 years agomvsdio: ignore high speed timing requests from the core
Nicolas Pitre [Fri, 15 May 2009 01:28:05 +0000]
mvsdio: ignore high speed timing requests from the core

Empirical evidences show that this is causing far more problems than it
solves when this mode is enabled in the host hardware.  Amongst those
cards that are known to be non functional when this bit is set are:

A-Data "Speedy" 2GB SD card
Kodak 512MB SD card
Ativa 1GB MicroSD card
Marvell 8688 (WIFI/Bluetooth) SDIO card

Since those cards do work on other host controllers which do honnor the
hs timing, the issue must be with this particular host hardware.

Signed-off-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>

10 years agommc/omap: Use disable_irq_nosync() from within irq handlers.
Ben Nizette [Thu, 16 Apr 2009 05:55:21 +0000]
mmc/omap: Use disable_irq_nosync() from within irq handlers.

disable_irq() should wait for all running handlers to complete
before returning.  As such, if it's used to disable an interrupt
from that interrupt's handler it will deadlock.  This replaces
the dangerous instances with the _nosync() variant which doesn't
have this problem.

Signed-off-by: Ben Nizette <bn@niasdigital.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>

10 years agosdhci-of: Add fsl,esdhc as a valid compatible to bind against
Kumar Gala [Fri, 8 May 2009 13:52:49 +0000]
sdhci-of: Add fsl,esdhc as a valid compatible to bind against

We plan to use fsl,esdhc going forward as the base compatible so update
the driver to bind against it.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>

10 years agomvsdio: allow automatic loading when modular
Nicolas Pitre [Sat, 9 May 2009 05:03:52 +0000]
mvsdio: allow automatic loading when modular

Signed-off-by: Nicolas Pitre <nico@marvell.com>
Tested-by: Martin Michlmayr <tbm@cyrius.com>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>

10 years agomxcmmc: Fix missing return value checking in DMA setup code.
Martin Fuzzey [Thu, 16 Apr 2009 20:00:41 +0000]
mxcmmc: Fix missing return value checking in DMA setup code.

Signed-off-by: Martin Fuzzey <mfuzzey@gmail.com>

10 years agomxcmmc : Reset the SDHC hardware if software timeout occurs.
Martin Fuzzey [Thu, 16 Apr 2009 20:00:36 +0000]
mxcmmc : Reset the SDHC hardware if software timeout occurs.

When a software timeout occurs in polling mode hardware was left in
an indeterminate state causing subsequent operations to block.

Signed-off-by: Martin Fuzzey <mfuzzey@gmail.com>

10 years agoomap_hsmmc: Trivial fix for a typo in comment
Anand Gadiyar [Wed, 15 Apr 2009 12:14:58 +0000]
omap_hsmmc: Trivial fix for a typo in comment

Signed-off-by: Anand Gadiyar <gadiyar@ti.com>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>

10 years agomxcmmc: decrease minimum frequency to make MMC cards work
Sascha Hauer [Fri, 3 Apr 2009 12:41:56 +0000]
mxcmmc: decrease minimum frequency to make MMC cards work

This is a temporary workaround until the MMC stack can be fixed.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>

10 years agomx[23]: don't put clock lookups in __initdata
Rabin Vincent [Tue, 26 May 2009 17:01:46 +0000]
mx[23]: don't put clock lookups in __initdata

Remove the __initdata annotation for the clock lookups, since they will
be needed when loading modules which use clk_get().

Tested-by: Agustín Ferrín Pozuelo <gatoguan-os@yahoo.com>
Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

10 years agofix oops when using console=ttymxcN with N > 0
Eric Lammerts [Wed, 20 May 2009 00:53:20 +0000]
fix oops when using console=ttymxcN with N > 0

Signed-off-by: Eric Lammerts <eric@lammerts.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

10 years agoLinux 2.6.30-rc8
Linus Torvalds [Wed, 3 Jun 2009 03:07:25 +0000]
Linux 2.6.30-rc8

10 years agoMerge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
Linus Torvalds [Wed, 3 Jun 2009 01:06:10 +0000]
Merge branch 'merge' of git://git./linux/kernel/git/benh/powerpc

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  powerpc/pmac: Update PowerMac 32-bit defconfig

10 years ago[ARM] ARMv7 errata: only apply fixes when running on applicable CPU
Russell King [Mon, 1 Jun 2009 11:50:33 +0000]
[ARM] ARMv7 errata: only apply fixes when running on applicable CPU

Currently, whenever an erratum workaround is enabled, it will be
applied whether or not the erratum is relevent for the CPU.  This
patch changes this - we check the variant and revision fields in the
main ID register to determine which errata to apply.

We also avoid re-applying erratum 460075 if it has already been applied.
Applying this fix in non-secure mode results in the kernel failing to
boot (or even do anything.)

This fixes booting on some ARMv7 based platforms which otherwise
silently fail.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

10 years ago[ARM] 5534/1: kmalloc must return a cache line aligned buffer
Martin Fuzzey [Mon, 1 Jun 2009 08:19:37 +0000]
[ARM] 5534/1: kmalloc must return a cache line aligned buffer

Define ARCH_KMALLOC_MINALIGN in asm/cache.h
At the request of Russell also move ARCH_SLAB_MINALIGN to this file.

Signed-off-by: Martin Fuzzey <mfuzzey@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

10 years agoparport: quickfix the proc registration bug
Alan Cox [Tue, 2 Jun 2009 15:58:10 +0000]
parport: quickfix the proc registration bug

Ideally we should have a directory of drivers and a link to the 'active'
driver. For now just show the first device which is effectively the existing
semantics without a warning.

This is an update on the original buggy patch that I then forgot to
resubmit. Confusingly it was proposed by Red Hat, written by Etched Pixels
fixed and submitted by Intel ...

Resolves-Bug: http://bugzilla.kernel.org/show_bug.cgi?id=9749
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>