12 years agokallsyms should prefer non weak symbols
Paulo Marques [Wed, 6 Feb 2008 09:37:33 +0000]
kallsyms should prefer non weak symbols

When resolving symbol names from addresses with aliased symbol names,
kallsyms_lookup always returns the first symbol, even if it is a weak
symbol.

This patch changes this by sorting the symbols with the weak symbols last
before feeding them to the kernel.  This way the kernel runtime isn't
changed at all, only the kallsyms build system is changed.

Another side effect is that the symbols get sorted by address, too.  So,
even if future binutils version have some bug in "nm" that makes it fail to
correctly sort symbols by address, the kernel won't be affected by this.

Mathieu says:

  I created a module in LTTng that uses kallsyms to get the symbol
  corresponding to a specific system call address.  Unfortunately, all the
  unimplemented syscalls were all referring to the (same) weak symbol
  identifying an unrelated system call rather that sys_ni (or whatever
  non-weak symbol would be expected).  Kallsyms was dumbly returning the first
  symbol that matched.

  This patch makes sure kallsyms returns the non-weak symbol when there is
  one, which seems to be the expected result.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Looks-great-to: Rusty Russell <rusty@rustcorp.com.au>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agounix98 allocated_ptys_lock semaphore to mutex
Daniel Walker [Wed, 6 Feb 2008 09:37:32 +0000]
unix98 allocated_ptys_lock semaphore to mutex

Convert the unix98 allocated_ptys_lock to a mutex.

Signed-off-by: Daniel Walker <dwalker@mvista.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agodrivers/isdn/i4l/isdn_tty.c: remove write_sem
Daniel Walker [Wed, 6 Feb 2008 09:37:32 +0000]
drivers/isdn/i4l/isdn_tty.c: remove write_sem

I couldn't find any users, so removing it..

Signed-off-by: Daniel Walker <dwalker@mvista.com>
Cc: Karsten Keil <kkeil@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agodrivers/char/tty_io.c: remove pty_sem
Daniel Walker [Wed, 6 Feb 2008 09:37:31 +0000]
drivers/char/tty_io.c: remove pty_sem

I couldn't find any users, so removing it..

Signed-off-by: Daniel Walker <dwalker@mvista.com>
Acked-by: Alan Cox <alan@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoDocumentation about unaligned memory access
Daniel Drake [Wed, 6 Feb 2008 09:37:30 +0000]
Documentation about unaligned memory access

Here's a document I wrote after figuring out what unaligned memory access
is all about.  I've tried to cover the information I was looking for when
trying to learn about this, without producing a hopelessly detailed/complex
spew.  I hope it is useful to others.

Signed-off-by: Daniel Drake <dsd@gentoo.org>
Cc: Rob Landley <rob@landley.net>
Cc: "Randy.Dunlap" <rdunlap@xenotime.net>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Jan Engelhardt <jengelh@computergmbh.de>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Kyle Moffett <mrmacman_g4@mac.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoinotify: remove debug code
Nick Piggin [Wed, 6 Feb 2008 09:37:29 +0000]
inotify: remove debug code

The inotify debugging code is supposed to verify that the
DCACHE_INOTIFY_PARENT_WATCHED scalability optimisation does not result in
notifications getting lost nor extra needless locking generated.

Unfortunately there are also some races in the debugging code.  And it isn't
very good at finding problems anyway.  So remove it for now.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Robert Love <rlove@google.com>
Cc: John McCutchan <ttb@tentacle.dhs.org>
Cc: Jan Kara <jack@ucw.cz>
Cc: Yan Zheng <yanzheng@21cn.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoinotify: fix race
Nick Piggin [Wed, 6 Feb 2008 09:37:28 +0000]
inotify: fix race

There is a race between setting an inode's children's "parent watched" flag
when placing the first watch on a parent, and instantiating new children of
that parent: a child could miss having its flags set by
set_dentry_child_flags, but then inotify_d_instantiate might still see
!inotify_inode_watched.

The solution is to set_dentry_child_flags after adding the watch.  Locking is
taken care of, because both set_dentry_child_flags and inotify_d_instantiate
hold dcache_lock and child->d_locks.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Robert Love <rlove@google.com>
Cc: John McCutchan <ttb@tentacle.dhs.org>
Cc: Jan Kara <jack@ucw.cz>
Cc: Yan Zheng <yanzheng@21cn.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoSC26XX: New serial driver for SC2681 uarts
Thomas Bogendoerfer [Wed, 6 Feb 2008 09:37:27 +0000]
SC26XX: New serial driver for SC2681 uarts

New serial driver for SC2681/SC2691 uarts.  Older SNI RM400 machines are
using these chips for onboard serial ports.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Torben Mathiasen <device@lanana.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agochar: use SGI_HAS_DS1286 for SGI_DS1286 depends
Thomas Bogendoerfer [Wed, 6 Feb 2008 09:37:26 +0000]
char: use SGI_HAS_DS1286 for SGI_DS1286 depends

Use SGI_HAS_DS1286 for SGI_DS1286 depends

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoserial: use SGI_HAS_ZILOG for IP22_ZILOG depends
Thomas Bogendoerfer [Wed, 6 Feb 2008 09:37:26 +0000]
serial: use SGI_HAS_ZILOG for IP22_ZILOG depends

- Use SGI_HAS_ZILOG for IP22_ZILOG depends
- remove IP22 from description, because the driver works on more than
  IP22 SGI machines

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoRemove superfluous checks for CONFIG_BLK_DEV_INITRD from initramfs.c
Robert P. J. Day [Wed, 6 Feb 2008 09:37:25 +0000]
Remove superfluous checks for CONFIG_BLK_DEV_INITRD from initramfs.c

Given that init/Makefile includes initramfs.c in the build only if
CONFIG_BLK_DEV_INITRD is defined, there seems to be no point checking for
it yet again.

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoRemove rcu_assign_pointer() penalty for NULL pointers
Paul E. McKenney [Wed, 6 Feb 2008 09:37:25 +0000]
Remove rcu_assign_pointer() penalty for NULL pointers

The rcu_assign_pointer() primitive currently unconditionally executes a
memory barrier, even when a NULL pointer is being assigned.  This has lead
some to avoid using rcu_assign_pointer() for NULL pointers, which loses the
self-documenting advantages of rcu_assign_pointer() This patch uses
__builtin_const_p() to omit needless memory barriers for NULL-pointer
assignments at compile time with no runtime penalty, as discussed in the
following thread:

http://www.mail-archive.com/netdev@vger.kernel.org/msg54852.html

Tested on x86_64 and ppc64, also compiled the four cases (NULL/non-NULL
and const/non-const) with gcc version 4.1.2, and hand-checked the
assembly output.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agokill an unused PTR_ERR in bdev_cache_init()
Qi Yong [Wed, 6 Feb 2008 09:37:23 +0000]
kill an unused PTR_ERR in bdev_cache_init()

Signed-off-by: Qi Yong <qiyong@fc-cn.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agodrivers/char/random.c:write_pool() cond_resched() needed
Matt Mackall [Wed, 6 Feb 2008 09:37:20 +0000]
drivers/char/random.c:write_pool() cond_resched() needed

Reduce latency for large writes to /dev/[u]random

Signed-off-by: Matt Mackall <mpm@selenic.com>
Cc: Sami Farin <safari-kernel@safari.iki.fi>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoFix __const_udelay declaration and definition mismatches
Jeff Dike [Wed, 6 Feb 2008 09:37:19 +0000]
Fix __const_udelay declaration and definition mismatches

The declaration and implementation of __const_udelay use different
names for the parameter on a number of architectures:

include/asm-avr32/delay.h:15:extern void __const_udelay(unsigned long usecs);
arch/avr32/lib/delay.c:39:inline void __const_udelay(unsigned long xloops)

include/asm-sh/delay.h:15:extern void __const_udelay(unsigned long usecs);
arch/sh/lib/delay.c:22:inline void __const_udelay(unsigned long xloops)

include/asm-m32r/delay.h:15:extern void __const_udelay(unsigned long usecs);
arch/m32r/lib/delay.c:58:void __const_udelay(unsigned long xloops)

include/asm-x86/delay.h:16:extern void __const_udelay(unsigned long usecs);
arch/x86/lib/delay_32.c:82:inline void __const_udelay(unsigned long xloops)
arch/x86/lib/delay_64.c:46:inline void __const_udelay(unsigned long xloops)

The units of the parameter isn't usecs, so that name is definitely
wrong.  It's also not exactly loops, so I suppose xloops is an OK
name.

This patch changes these names from usecs to xloops.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agosynclink_gt fix missed serial input signal changes
Paul Fulghum [Wed, 6 Feb 2008 09:37:18 +0000]
synclink_gt fix missed serial input signal changes

Fix missed serial input signal changes caused by rereading the serial
status register during interrupt processing.  Now processing is performed
on original status register value.

Signed-off-by: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agosynclink: standardize format of linux header file include's with "<>"
Robert P. J. Day [Wed, 6 Feb 2008 09:37:17 +0000]
synclink: standardize format of linux header file include's with "<>"

Use the recommended form of "<>" to include linux header files, and
move those includes up to join the rest of the linux includes.

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Acked-by: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoget rid of NR_OPEN and introduce a sysctl_nr_open
Eric Dumazet [Wed, 6 Feb 2008 09:37:16 +0000]
get rid of NR_OPEN and introduce a sysctl_nr_open

NR_OPEN (historically set to 1024*1024) actually forbids processes to open
more than 1024*1024 handles.

Unfortunatly some production servers hit the not so 'ridiculously high
value' of 1024*1024 file descriptors per process.

Changing NR_OPEN is not considered safe because of vmalloc space potential
exhaust.

This patch introduces a new sysctl (/proc/sys/fs/nr_open) wich defaults to
1024*1024, so that admins can decide to change this limit if their workload
needs it.

[akpm@linux-foundation.org: export it for sparc64]
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoreiserfs: complement va_start() with va_end().
Richard Knutsson [Wed, 6 Feb 2008 09:37:15 +0000]
reiserfs: complement va_start() with va_end().

Complement va_start() with va_end().

Signed-off-by: Richard Knutsson <ricknu-0@student.ltu.se>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agovia-rng: enable secondary noise source on CPUs where it is present
Dave Jones [Wed, 6 Feb 2008 09:37:13 +0000]
via-rng: enable secondary noise source on CPUs where it is present

In the padlock spec:

"SRC Bits[9:8] Noise source select (I): These bits control the two noise
 sources on the processor that input bits to the accumulation buffers.
 On Nehemiah processors prior to stepping 8, these bits are reserved
 and undefined. The default RESET state is both bits = 0."

Signed-off-by: Dave Jones <davej@redhat.com>
Tested-by: Udo van den Heuvel <udovdh@xs4all.nl>
Cc: Michael Buesch <mb@bu3sch.de>
Cc: folkert van Heusden <folkert@vanheusden.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoinotify: send IN_ATTRIB events when link count changes
Jan Kara [Wed, 6 Feb 2008 09:37:13 +0000]
inotify: send IN_ATTRIB events when link count changes

Currently, no notification event has been sent when inode's link count
changed.  This is inconvenient for the application in some cases:

Suppose you have the following directory structure

    foo/test
    bar/

and you watch test.  If someone does "mv foo/test bar/", you get event
IN_MOVE_SELF and you know something has happened with the file "test".
However if someone does "ln foo/test bar/test" and "rm foo/test" you get no
inotify event for the file "test" (only directories "foo" and "bar" receive
events).

Furthermore it could be argued that link count belongs to file's metadata and
thus IN_ATTRIB should be sent when it changes.

The following patch implements sending of IN_ATTRIB inotify events when link
count of the inode changes, i.e., when a hardlink to the inode is created or
when it is removed.  This event is sent in addition to all the events sent so
far.  In particular, when a last link to a file is removed, IN_ATTRIB event is
sent in addition to IN_DELETE_SELF event.

Signed-off-by: Jan Kara <jack@suse.cz>
Acked-by: Morten Welinder <mwelinder@gmail.com>
Cc: Robert Love <rlove@google.com>
Cc: John McCutchan <ttb@tentacle.dhs.org>
Cc: Steven French <sfrench@us.ibm.com>
Cc: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoMAINTAINERS, order AUERSWALD alphabetically
Jiri Slaby [Wed, 6 Feb 2008 09:37:11 +0000]
MAINTAINERS, order AUERSWALD alphabetically

MAINTAINERS, order AUERSWALD alphabetically

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: Wolfgang Muees <wolfgang@iksw-muees.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agohfs: update comment to reflect actual init and exit routines
Robert P. J. Day [Wed, 6 Feb 2008 09:37:10 +0000]
hfs: update comment to reflect actual init and exit routines

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoaddress hfs on-disk corruption robustness review comments
Eric Sandeen [Wed, 6 Feb 2008 09:37:10 +0000]
address hfs on-disk corruption robustness review comments

Address Roman's review comments for the previously sent on-disk
corruption hfs robustness patch.

- use 0 as a failure value, rather than making a new macro HFS_BAD_KEYLEN,
  and use a switch statement instead of if's.

- Add new fail: target to __hfs_brec_find to skip assignments using bad
  values when exiting with a failure.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoNCPFS: update diagnostic strings to match routine names.
Robert P. J. Day [Wed, 6 Feb 2008 09:37:09 +0000]
NCPFS: update diagnostic strings to match routine names.

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Cc: Petr Vandrovec <VANDROVE@vc.cvut.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agofs: use list_for_each_entry_reverse and kill sb_entry
Akinobu Mita [Wed, 6 Feb 2008 09:37:08 +0000]
fs: use list_for_each_entry_reverse and kill sb_entry

Use list_for_each_entry_reverse for super_blocks list and remove
unused sb_entry macro.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agofs: use hlist_unhashed
Akinobu Mita [Wed, 6 Feb 2008 09:37:07 +0000]
fs: use hlist_unhashed

Use hlist_unhashed() instead of opencoded equivalent.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoproc: loadavg reading race
Michal Schmidt [Wed, 6 Feb 2008 09:37:07 +0000]
proc: loadavg reading race

The avenrun[] values are supposed to be protected by xtime_lock.
loadavg_read_proc does not use it.  Theoretically this may result in an
occasional glitch when the value read from /proc/loadavg would be as much
as 1<<11 times higher than it should be.

Signed-off-by: Michal Schmidt <mschmidt@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agodo_wait: remove one "else if" branch
Oleg Nesterov [Wed, 6 Feb 2008 09:37:06 +0000]
do_wait: remove one "else if" branch

Minor cleanup. We can remove one "else if" branch.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoAvoid divide in IS_ALIGN
Herbert Xu [Wed, 6 Feb 2008 09:37:05 +0000]
Avoid divide in IS_ALIGN

I was happy to discover the brand new IS_ALIGN macro and quickly used it in
my code.  To my dismay I found that the generated code used division to
perform the test.

This patch fixes it by changing the % test to an &.  This avoids the
division.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agovt: bitlock fix
Nick Piggin [Wed, 6 Feb 2008 09:37:04 +0000]
vt: bitlock fix

vt is missing a memory barrier to close the critical section.  Use a real
spinlock for this.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agotpm.c: fix crash during device removal
Richard MUSIL [Wed, 6 Feb 2008 09:37:02 +0000]
tpm.c: fix crash during device removal

The clean up procedure now uses platform device "release" callback to
handle memory clean up.  For this purpose "release" function callback was
added to struct tpm_vendor_specific, so hw device driver provider can get
called when it is safe to remove all allocated resources.

This is supposed to fix a bug in device removal, where device while in
receive function (waiting on timeout) was prone to segfault, if the
tpm_chip struct was unallocated before the timeout expired (in
tpm_remove_hardware).

Acked-by: Marcel Selhorst <tpm@selhorst.net>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoprintk.c: use unsigned ints instead of longs for logbuf index
Denys Vlasenko [Wed, 6 Feb 2008 09:37:02 +0000]
printk.c: use unsigned ints instead of longs for logbuf index

Stop using unsigned _longs_ for printk buffer indexes.  Log buffer is way
smaller than 2 gigabytes and unsigned ints will work too .  Indeed, they do
work nicely on all 32-bit platforms where longs and ints are the same.

With this patch, we have following size savings on amd64:

   text    data     bss     dec     hex filename
   5997     313   17736   24046    5dee 2.6.23.1.t64/kernel/printk.o
   5858     313   17700   23871    5d3f 2.6.23.1.printk.t64/kernel/printk.o

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoPERCPU : __percpu_alloc_mask() can dynamically size percpu_data storage
Eric Dumazet [Wed, 6 Feb 2008 09:37:01 +0000]
PERCPU : __percpu_alloc_mask() can dynamically size percpu_data storage

Instead of allocating a fix sized array of NR_CPUS pointers for percpu_data,
we can use nr_cpu_ids, which is generally < NR_CPUS.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoDocument I_SYNC and I_DATASYNC
Joern Engel [Wed, 6 Feb 2008 09:36:59 +0000]
Document I_SYNC and I_DATASYNC

After some archeology (see http://logfs.org/logfs/inode_state_bits) I
finally figured out what the three I_DIRTY bits do.  Maybe others would
prefer less effort to reach this insight.

Signed-off-by: Joern Engel <joern@logfs.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoalpha/parisc: remove config variable DEBUG_RWLOCK
Jiri Olsa [Wed, 6 Feb 2008 09:36:56 +0000]
alpha/parisc: remove config variable DEBUG_RWLOCK

Remove config variable DEBUG_RWLOCK, since it is not used.

Signed-off-by: Jiri Olsa <olsajiri@gmail.com>
Acked-by: Grant Grundler <grundler@parisc-linux.org>
Acked-by: Kyle McMartin <kyle@mcmartin.ca>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agofs: remove dead config CONFIG_HAS_COMPAT_EPOLL_EVENT symbol
Jiri Olsa [Wed, 6 Feb 2008 09:36:55 +0000]
fs: remove dead config CONFIG_HAS_COMPAT_EPOLL_EVENT symbol

Remove dead config CONFIG_HAS_COMPAT_EPOLL_EVENT symbol.

Signed-off-by: Jiri Olsa <olsajiri@gmail.com>
Cc: Davide Libenzi <davidel@xmailserver.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agolog2.h: Define order_base_2() macro for convenience.
Robert P. J. Day [Wed, 6 Feb 2008 09:36:54 +0000]
log2.h: Define order_base_2() macro for convenience.

Given a number of places in the tree that need to calculate this value
explicitly, might as well just create a macro for it.

(akpm: must be implemented as a macro for callee typeof() usage)

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agocciss: use upper_32_bits() macro to eliminate warnings
Randy Dunlap [Wed, 6 Feb 2008 09:36:54 +0000]
cciss: use upper_32_bits() macro to eliminate warnings

Use upper_32_bits(x) macro to handle shifts that may be >= the width of
the data type.

drivers/block/cciss.c: In function 'do_cciss_request':
drivers/block/cciss.c:2655: warning: right shift count >= width of type
drivers/block/cciss.c:2656: warning: right shift count >= width of type
drivers/block/cciss.c:2657: warning: right shift count >= width of type
drivers/block/cciss.c:2658: warning: right shift count >= width of type

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: <mike.miller@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agotime: fix sysfs_show_{available,current}_clocksources() buffer overflow problem
Miao Xie [Wed, 6 Feb 2008 09:36:53 +0000]
time: fix sysfs_show_{available,current}_clocksources() buffer overflow problem

I found that there is a buffer overflow problem in the following code.

Version: 2.6.24-rc2,
File: kernel/time/clocksource.c:417-432
--------------------------------------------------------------------
static ssize_t
sysfs_show_available_clocksources(struct sys_device *dev, char *buf)
{
struct clocksource *src;
char *curr = buf;

spin_lock_irq(&clocksource_lock);
list_for_each_entry(src, &clocksource_list, list) {
curr += sprintf(curr, "%s ", src->name);
}
spin_unlock_irq(&clocksource_lock);

curr += sprintf(curr, "\n");

return curr - buf;
}
-----------------------------------------------------------------------

sysfs_show_current_clocksources() also has the same problem though in practice
the size of current clocksource's name won't exceed PAGE_SIZE.

I fix the bug by using snprintf according to the specification of the kernel
(Version:2.6.24-rc2,File:Documentation/filesystems/sysfs.txt)

Fix sysfs_show_available_clocksources() and sysfs_show_current_clocksources()
buffer overflow problem with snprintf().

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Cc: WANG Cong <xiyou.wangcong@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: john stultz <johnstul@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agosound/oss/trident.c: fix incorrect test in trident_ac97_set()
Roel Kluin [Wed, 6 Feb 2008 09:36:51 +0000]
sound/oss/trident.c: fix incorrect test in trident_ac97_set()

If count reaches zero, the loop ends, but the postfix decrement still
subtracts: testing for 'count == 0' will not work.

Signed-off-by: Roel Kluin <12o3l@tiscali.nl>
Reviewed-by: Ray Lee <ray-lk@madrabbit.org>
Acked-by: Muli Ben-Yehuda <muli@il.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agord: use is_power_of_2() in drivers/block/rd.c.
Robert P. J. Day [Wed, 6 Feb 2008 09:36:51 +0000]
rd: use is_power_of_2() in drivers/block/rd.c.

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agodrivers/misc/lkdtm.c: cleanups
Adrian Bunk [Wed, 6 Feb 2008 09:36:50 +0000]
drivers/misc/lkdtm.c: cleanups

- make needlessly global functions static
- make lkdtm_module_{init,exit}() as __{init,exit}

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Cc: Ankita Garg <ankita@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoproper prototype for vty_init()
Adrian Bunk [Wed, 6 Feb 2008 09:36:49 +0000]
proper prototype for vty_init()

Add a proper prototype for vty_init() in include/linux/vt_kern.h

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agofs/eventfd.c should #include <linux/syscalls.h>
Adrian Bunk [Wed, 6 Feb 2008 09:36:49 +0000]
fs/eventfd.c should #include <linux/syscalls.h>

Every file should include the headers containing the prototypes for its global
functions (in this case sys_eventfd()).

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Cc: Davide Libenzi <davidel@xmailserver.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agofs/signalfd.c should #include <linux/syscalls.h>
Adrian Bunk [Wed, 6 Feb 2008 09:36:48 +0000]
fs/signalfd.c should #include <linux/syscalls.h>

Every file should include the headers containing the prototypes for its global
functions (in this case sys_signalfd()).

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Cc: Davide Libenzi <davidel@xmailserver.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agofs/utimes.c should #include <linux/syscalls.h>
Adrian Bunk [Wed, 6 Feb 2008 09:36:47 +0000]
fs/utimes.c should #include <linux/syscalls.h>

Every file should include the headers containing the prototypes for its global
functions.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoproper prototype for get_filesystem_list()
Adrian Bunk [Wed, 6 Feb 2008 09:36:47 +0000]
proper prototype for get_filesystem_list()

Ad a proper prototype for migration_init() in include/linux/fs.h

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agokernel/notifier.c should #include <linux/reboot.h>
Adrian Bunk [Wed, 6 Feb 2008 09:36:46 +0000]
kernel/notifier.c should #include <linux/reboot.h>

Every file should include the headers containing the prototypes for its global
functions (in this case {,un}register_reboot_notifier()).

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agomake srcu_readers_active() static
Adrian Bunk [Wed, 6 Feb 2008 09:36:45 +0000]
make srcu_readers_active() static

Make the needlessly global srcu_readers_active() static.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Cc: "Paul E. McKenney" <paulmck@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agokernel/ptrace.c should #include <linux/syscalls.h>
Adrian Bunk [Wed, 6 Feb 2008 09:36:44 +0000]
kernel/ptrace.c should #include <linux/syscalls.h>

Every file should include the headers containing the prototypes for its global
functions (in this case sys_ptrace()).

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoproper prototype for signals_init()
Adrian Bunk [Wed, 6 Feb 2008 09:36:44 +0000]
proper prototype for signals_init()

Add a proper prototype for signals_init() in include/linux/signal.h

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agosmbfs: fix calculation of kernel_recvmsg size parameter in smb_receive()
Jeff Layton [Wed, 6 Feb 2008 09:36:43 +0000]
smbfs: fix calculation of kernel_recvmsg size parameter in smb_receive()

smb_receive calls kernel_recvmsg with a size that's the minimum of the
amount of buffer space in the kvec passed in or req->rq_rlen (which
represents the length of the response).  This does not take into account
any data that was read in a request earlier pass through smb_receive.

If the first pass through smb_receive receives some but not all of the
response, then the next pass can call kernel_recvmsg with a size field
that's too big.  kernel_recvmsg can overrun into the next response,
throwing off the alignment and making it unrecognizable.

This causes messages like this to pop up in the ring buffer:

smb_get_length: Invalid NBT packet, code=69

as well as other errors indicating that the response is unrecognizable.
Typically this is seen on a smbfs mount under heavy I/O.

This patch changes the code to use (req->rq_rlen - req->rq_bytes_recvd)
instead instead of just req->rq_rlen, since that should represent the
amount of unread data in the response.

I think this is correct, but an ACK or NACK from someone more familiar
with this code would be appreciated...

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoread_current_timer() cleanups
Andrew Morton [Wed, 6 Feb 2008 09:36:42 +0000]
read_current_timer() cleanups

- All implementations can be __devinit

- The function prototypes were in asm/timex.h but they all must be the same,
  so create a single declaration in linux/timex.h.

- uninline the sparc64 version to match the other architectures

- Don't bother #defining ARCH_HAS_READ_CURRENT_TIMER to a particular value.

[ezk@cs.sunysb.edu: fix build]
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoscheduled OSS driver removal
Adrian Bunk [Wed, 6 Feb 2008 09:36:36 +0000]
scheduled OSS driver removal

This patch contains the scheduled removal of OSS drivers whose config
options have been removed in 2.6.23.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoFAT: Fix printk format strings
Vegard Nossum [Wed, 6 Feb 2008 09:36:36 +0000]
FAT: Fix printk format strings

This makes sure printk format strings contain no more than a single line.

Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
[the message was tweaked.]
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoproper show_interrupts() prototype
Adrian Bunk [Wed, 6 Feb 2008 09:36:35 +0000]
proper show_interrupts() prototype

Add a proper prototype for show_interrupts() in include/linux/interrupt.h

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoMNT_UNBINDABLE fix
Andries E. Brouwer [Wed, 6 Feb 2008 09:36:32 +0000]
MNT_UNBINDABLE fix

Some time ago ( http://lkml.org/lkml/2007/6/19/128 ) I wrote about
MNT_UNBINDABLE that it felt like a bug that it is not reset by "mount
--make-private".

Today I happened to see mount(8) and Documentation/sharedsubtree.txt and
both document the version obtained by applying the little patch given in
the above (and again below).

So, the present kernel code is not according to specs and must be regarded
as buggy.

Specification in Documentation/sharedsubtree.txt:
See state diagram: unbindable should become private upon make-private.

Specification in mount(8):
    ...  It's
    also possible to  set  up  uni-directional  propagation  (with  --make-
    slave),  to  make  a  mount  point unavailable for --bind/--rbind (with
    --make-unbindable), and to undo any  of  these  (with  --make-private).

Repeat of old fix-shared-subtrees-make-private.patch
(due to Dirk Gerrits, René Gabriëls, Peter Kooijmans):

Acked-by: Ram Pai <linuxram@us.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoremove mm_{ptov,vtop}()
Adrian Bunk [Wed, 6 Feb 2008 09:36:30 +0000]
remove mm_{ptov,vtop}()

This patch removes the unused mm_{ptov,vtop}().

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Acked-by: Greg Ungerer <gerg@uclinux.org>
Acked-by: Bryan Wu <bryan.wu@analog.com>
Cc: Miles Bader <miles.bader@necel.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agocleanup after APUS removal
Adrian Bunk [Wed, 6 Feb 2008 09:36:29 +0000]
cleanup after APUS removal

After the APUS removal, some code can be removed.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Cc: Karsten Keil <kkeil@suse.de>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agomake ipc/util.c:sysvipc_find_ipc() static
Adrian Bunk [Wed, 6 Feb 2008 09:36:28 +0000]
make ipc/util.c:sysvipc_find_ipc() static

sysvipc_find_ipc() can become static.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Acked-by: Nadia Derbey <Nadia.Derbey@bull.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoregister_cpu __devinit or __cpuinit
Randy Dunlap [Wed, 6 Feb 2008 09:36:28 +0000]
register_cpu __devinit or __cpuinit

Is there some reason why register_cpu() is __devinit instead of __cpuinit ?
Make it __cpuinit.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoAllow auto-destruction of loop devices
David Woodhouse [Wed, 6 Feb 2008 09:36:27 +0000]
Allow auto-destruction of loop devices

This allows a flag to be set on loop devices so that when they are
closed for the last time, they'll self-destruct.

In general, so that we can automatically allocate loop devices (as with
losetup -f) and have them disappear when we're done with them.

In particular, right now, so that we can stop relying on the hackish
special-case in umount(8) which kills off loop devices which were set up by
'mount -oloop'.  That means we can stop putting crap in /etc/mtab which
doesn't belong there, which means it can be a symlink to /proc/mounts, which
means yet another writable file on the root filesystem is eliminated and the
'stateless' folks get happier...  and OLPC trac #356 can be closed.

The mount(8) side of that is at
http://marc.info/?l=util-linux-ng&m=119362955431694&w=2

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Cc: Bernardo Innocenti <bernie@codewiz.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoremove support for un-needed _extratext section
Robin Getz [Wed, 6 Feb 2008 09:36:26 +0000]
remove support for un-needed _extratext section

When passing a zero address to kallsyms_lookup(), the kernel thought it was
a valid kernel address, even if it is not.  This is because is_ksym_addr()
called is_kernel_extratext() and checked against labels that don't exist on
many archs (which default as zero).  Since PPC was the only kernel which
defines _extra_text, (in 2005), and no longer needs it, this patch removes
_extra_text support.

For some history (provided by Jon):
 http://ozlabs.org/pipermail/linuxppc-dev/2005-September/019734.html
 http://ozlabs.org/pipermail/linuxppc-dev/2005-September/019736.html
 http://ozlabs.org/pipermail/linuxppc-dev/2005-September/019751.html

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Jon Loeliger <jdl@freescale.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoParallel port: convert port_mutex to the mutex API
Matthias Kaehlcke [Wed, 6 Feb 2008 09:36:25 +0000]
Parallel port: convert port_mutex to the mutex API

Parallel port: Convert port_mutex to the mutex API

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agodcdbas: add DMI-based module autloading
Matt Domsch [Wed, 6 Feb 2008 09:36:24 +0000]
dcdbas: add DMI-based module autloading

DMI autoload dcdbas on all Dell systems.

This looks for BIOS Vendor or System Vendor == Dell, so this should
work for systems both Dell-branded and those Dell builds but brands
for others.  It causes udev to load the dcdbas module at startup,
which is used by tools called by HAL for wireless control and
backlight control, among other uses.

Thanks to Kay Sievers for figuring out how to do this with a single alias.

Signed-off-by: Matt Domsch <Matt_Domsch@dell.com>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoGenericizing iova.[ch]
David Miller [Wed, 6 Feb 2008 09:36:23 +0000]
Genericizing iova.[ch]

I would like to potentially move the sparc64 IOMMU code over to using
the nice new drivers/pci/iova.[ch] code for free area management..

In order to do that we have to detach the IOMMU page size assumptions
which only really need to exist in the intel-iommu.[ch] code.

This patch attempts to implement that.

[akpm@linux-foundation.org: build fix]
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoIPC: fix error check in all new xxx_lock() and xxx_exit_ns() functions
Pierre Peiffer [Wed, 6 Feb 2008 09:36:23 +0000]
IPC: fix error check in all new xxx_lock() and xxx_exit_ns() functions

In the new implementation of the [sem|shm|msg]_lock[_check]() routines, we
use the return value of ipc_lock() in container_of() without any check.
But ipc_lock may return a errcode.  The use of this errcode in
container_of() may alter this errcode, and we don't want this.

And in xxx_exit_ns, the pointer return by idr_find is of type 'struct
kern_ipc_per'...

Today, the code will work as is because the member used in these
container_of() is the first member of its container (offset == 0), the
errcode isn't changed then.  But in the general case, we can't count on
this assumption and this may lead later to a real bug if we don't correct
this.

Again, the proposed solution is simple and correct.  But, as pointed by
Nadia, with this solution, the same check will be done several times (in
all sub-callers...), what is not very funny/optimal...

Signed-off-by: Pierre Peiffer <pierre.peiffer@bull.net>
Cc: Nadia Derbey <Nadia.Derbey@bull.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoRemove pointless casts from void pointers
Jeff Garzik [Wed, 6 Feb 2008 09:36:20 +0000]
Remove pointless casts from void pointers

Mostly in and around irq handlers.

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: "Luck Tony" <tony.luck@intel.com>
Cc: Roman Zippel <zippel@linux-m68k.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Dmitry Torokhov <dtor@mail.ru>
Cc: Karsten Keil <kkeil@suse.de>
Acked-by: "John W. Linville" <linville@tuxdriver.com>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Cc: David Brownell <david-b@pacbell.net>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Acked-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Acked-by: Holger Schurig <hs4233@mail.mn-solutions.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoSIGIO-driven I/O with inotify queues
Dmitry Antipov [Wed, 6 Feb 2008 09:36:19 +0000]
SIGIO-driven I/O with inotify queues

Add SIGIO-driven I/O for descriptors returned by inotify_init().  The thing
may be enabled by convenient fcntl (fd, F_SETFL, O_ASYNC) call.

Signed-off-by: Dmitry Antipov <antipov@dev.rtsoft.ru>
Cc: Robert Love <rlove@google.com>
Cc: John McCutchan <ttb@tentacle.dhs.org>
Cc: Michael Kerrisk <mtk-manpages@gmx.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoext2: change the default behaviour on error
Aneesh Kumar K.V [Wed, 6 Feb 2008 09:36:17 +0000]
ext2: change the default behaviour on error

ext2 file system was by default ignoring errors and continuing.  This is
not a good default as continuing on error could lead to file system
corruption.  Change the default to mark the file system readonly.  Debian
and ubuntu already does this as the default in their fstab.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: <linux-ext4@vger.kernel.org>
Cc: Eric Sandeen <sandeen@redhat.com>
Cc: Jan Kara <jack@ucw.cz>
Cc: Dave Jones <davej@codemonkey.org.uk>
Cc: Chuck Ebbert <cebbert@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoext2: return after ext2_error in case of failures
Aneesh Kumar K.V [Wed, 6 Feb 2008 09:36:17 +0000]
ext2: return after ext2_error in case of failures

This fixes some instances where we were continuing after calling
ext2_error.  ext2_error call panic only if errors=panic mount option is
set.  So we need to make sure we return correctly after ext2_error call.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agosound/oss/sb_common.c: fix casting warning
Jeff Garzik [Wed, 6 Feb 2008 09:36:16 +0000]
sound/oss/sb_common.c: fix casting warning

sound/oss/sb_common.c: In function 'probe_sbmpu':
sound/oss/sb_common.c:1231: warning: cast to pointer from integer of different size

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agosound/oss/pss: set_io_base() always returns success, mark it void
Jeff Garzik [Wed, 6 Feb 2008 09:36:15 +0000]
sound/oss/pss: set_io_base() always returns success, mark it void

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoRemove inclusions of <linux/autoconf.h>
Ralf Baechle [Wed, 6 Feb 2008 09:36:15 +0000]
Remove inclusions of <linux/autoconf.h>

Nothing should ever include this file.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: "Mike Frysinger" <vapier.adi@gmail.com>
Acked-by: "Bryan Wu" <cooloney.lkml@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agohash: add explicit u32 and u64 versions of hash
Matthew Wilcox [Wed, 6 Feb 2008 09:36:14 +0000]
hash: add explicit u32 and u64 versions of hash

The 32-bit version is more efficient (and apparently gives better hash
results than the 64-bit version), so users who are only hashing a 32-bit
quantity can now opt to use the 32-bit version explicitly, rather than
promoting to a long.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Cc: William Lee Irwin III <wli@holomorphy.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agouse __set_task_state() for TRACED/STOPPED tasks
Oleg Nesterov [Wed, 6 Feb 2008 09:36:13 +0000]
use __set_task_state() for TRACED/STOPPED tasks

1. It is much easier to grep for ->state change if __set_task_state() is used
   instead of the direct assignment.

2. ptrace_stop() and handle_group_stop() use set_task_state() which adds the
   unneeded mb() (btw even if we use mb() it is still possible that do_wait()
   sees the new ->state but not ->exit_code, but this is ok).

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Acked-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agotaskstats scaled time cleanup
Michael Neuling [Wed, 6 Feb 2008 09:36:12 +0000]
taskstats scaled time cleanup

This moves the ability to scale cputime into generic code.  This allows us
to fix the issue in kernel/timer.c (noticed by Balbir) where we could only
add an unscaled value to the scaled utime/stime.

This adds a cputime_to_scaled function.  As before, the POWERPC version
does the scaling based on the last SPURR/PURR ratio calculated.  The
generic and s390 (only other arch to implement asm/cputime.h) versions are
both NOPs.

Also moves the SPURR and PURR snapshots closer.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Cc: Jay Lan <jlan@engr.sgi.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoriscom8: fix SMP brokenness
Jeff Garzik [Wed, 6 Feb 2008 09:36:11 +0000]
riscom8: fix SMP brokenness

After analyzing the elements that save_flags/cli/sti/restore_flags were
protecting, convert their usages to a global spinlock (the easiest and
most obvious next-step).  There were some usages of flags being
intentionally cached, because the code already knew the state of
interrupts.  These have been taken into account.

This allows us to remove CONFIG_BROKEN_ON_SMP.  Completely untested.

[akpm@linux-foundation.org: use DEFINE_SPINLOCK]
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoA potential bug in inotify_user.c
Yan Zheng [Wed, 6 Feb 2008 09:36:09 +0000]
A potential bug in inotify_user.c

Following comment is at fs/inotify_user.c:287
/* coalescing: drop this event if it is a dupe of the previous */

I think the previous event in the comment should be the last event in the
link list.  But inotify_dev_get_event return the first event in the list.
In addition, it doesn't check whether the list is empty

Signed-off-by: Yan Zheng<yanzheng@21cn.com>
Acked-by: Robert Love <rlove@rlove.org>
Cc: John McCutchan <ttb@tentacle.dhs.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agofs/fat/: refine chmod checks
Jan Engelhardt [Wed, 6 Feb 2008 09:36:08 +0000]
fs/fat/: refine chmod checks

Prohibit mode changes in non-quiet mode that cannot be stored reliably with
the on-disk format.

Suppose a vfat filesystem is mounted with umask=0 and [not-quiet].  Then
all files will have mode 0777.  Trying to change the owner will fail,
because fat does not know about owners or groups.  chmod 0770, on the other
hand, will succeed, even though fat does not know about the permission
triplet [user/group/other].

So this patch changes fat's not-quiet behavior so that only UNIX modes are
accepted that can be mapped lossless between the fat disk format and the
local system.  There is only one attribute, and that is the readonly
attribute, which is mapped to the UNIX write permission bit(s).  chmod 0555
is therefore valid (taking away the +w bits <=> setting the readonly
attribute).  Since chmod 0775 and chmod 0755 is an ambiguous case as to
whether to set or clear the readonly bit, these modes are also denied.

In quiet mode, chmod and chown will continue to "succeed" as they did
before, meaning that a subsequent stat() will temporarily return the new
mode as long as the inode is not reread from disk, and chown will silently
do nothing, not even return the new uid/gid in stat().

Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de>
Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agogeode lists are subscriber only
Alan Cox [Wed, 6 Feb 2008 09:36:07 +0000]
geode lists are subscriber only

This gave me bounces and moans when chasing CS5536 so document it.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agofix ! versus & precedence in various places
Alexey Dobriyan [Wed, 6 Feb 2008 09:36:06 +0000]
fix ! versus & precedence in various places

Fix various instances of

if (!expr & mask)

which should probably have been

if (!(expr & mask))

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: Peter Osterlund <petero2@telia.com>
Cc: Karsten Keil <kkeil@suse.de>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: Mark Fasheh <mark.fasheh@oracle.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6
Linus Torvalds [Wed, 6 Feb 2008 03:06:25 +0000]
Merge git://git./linux/kernel/git/bart/ide-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6: (29 commits)
  ide-tape: bump minor driver version
  ide-tape: cleanup the remaining codestyle issues
  ide-tape: fix syntax error in idetape_identify_device()
  ide-tape: remove leftover OnStream support warning
  ide-tape: collect module-related macro calls at the end
  ide-tape: include proper headers
  ide-tape: remove unused "length" arg from idetape_create_read_buffer_cmd()
  ide-tape: remove struct idetape_id_gcw
  ide-tape: cleanup and fix comments
  ide-tape: shorten some function names
  ide-tape: remove idetape_increase_max_pipeline_stages()
  ide-tape: struct idetape_tape_t: shorten member names v2
  ide-tape: struct idetape_tape_t: remove unused members
  ide-tape: remove typedef idetape_chrdev_direction_t
  ide-tape: simplify code branching in the interrupt handler
  ide-tape: remove unreachable code chunk
  ide-tape: remove struct idetape_read_position_result_t
  ide-tape: refactor the debug logging facility
  ide: add ide_read_error() inline helper
  ide: add ide_read_[alt]status() inline helpers
  ...

12 years agoMerge branch 'dmapool' of git://git.kernel.org/pub/scm/linux/kernel/git/willy/misc
Linus Torvalds [Wed, 6 Feb 2008 03:05:48 +0000]
Merge branch 'dmapool' of git://git./linux/kernel/git/willy/misc

* 'dmapool' of git://git.kernel.org/pub/scm/linux/kernel/git/willy/misc:
  pool: Improve memory usage for devices which can't cross boundaries
  Change dmapool free block management
  dmapool: Tidy up includes and add comments
  dmapool: Validate parameters to dma_pool_create
  Avoid taking waitqueue lock in dmapool
  dmapool: Fix style problems
  Move dmapool.c to mm/ directory

12 years agoide-tape: bump minor driver version
Borislav Petkov [Wed, 6 Feb 2008 01:57:55 +0000]
ide-tape: bump minor driver version

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

12 years agoide-tape: cleanup the remaining codestyle issues
Borislav Petkov [Wed, 6 Feb 2008 01:57:54 +0000]
ide-tape: cleanup the remaining codestyle issues

... thus decreasing checkpatch.pl errors to 0.

Bart:
- remove needless function prototypes while at it
- remove needless parentheses while at it
- add missing KERN_ level to ide_tape_probe()
- other minor fixups

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

12 years agoide-tape: fix syntax error in idetape_identify_device()
Borislav Petkov [Wed, 6 Feb 2008 01:57:54 +0000]
ide-tape: fix syntax error in idetape_identify_device()

Spotted by Sergei Shtylyov.

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

12 years agoide-tape: remove leftover OnStream support warning
Borislav Petkov [Wed, 6 Feb 2008 01:57:54 +0000]
ide-tape: remove leftover OnStream support warning

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

12 years agoide-tape: collect module-related macro calls at the end
Borislav Petkov [Wed, 6 Feb 2008 01:57:54 +0000]
ide-tape: collect module-related macro calls at the end

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

12 years agoide-tape: include proper headers
Borislav Petkov [Wed, 6 Feb 2008 01:57:54 +0000]
ide-tape: include proper headers

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

12 years agoide-tape: remove unused "length" arg from idetape_create_read_buffer_cmd()
Borislav Petkov [Wed, 6 Feb 2008 01:57:54 +0000]
ide-tape: remove unused "length" arg from idetape_create_read_buffer_cmd()

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

12 years agoide-tape: remove struct idetape_id_gcw
Borislav Petkov [Wed, 6 Feb 2008 01:57:53 +0000]
ide-tape: remove struct idetape_id_gcw

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

12 years agoide-tape: cleanup and fix comments
Borislav Petkov [Wed, 6 Feb 2008 01:57:53 +0000]
ide-tape: cleanup and fix comments

Also, remove redundant ones and cleanup whitespace.

Bart:
- minor fixups

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

12 years agoide-tape: shorten some function names
Borislav Petkov [Wed, 6 Feb 2008 01:57:53 +0000]
ide-tape: shorten some function names

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

12 years agoide-tape: remove idetape_increase_max_pipeline_stages()
Borislav Petkov [Wed, 6 Feb 2008 01:57:52 +0000]
ide-tape: remove idetape_increase_max_pipeline_stages()

This function was being used only at one place so fold it in there.

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

12 years agoide-tape: struct idetape_tape_t: shorten member names v2
Borislav Petkov [Wed, 6 Feb 2008 01:57:52 +0000]
ide-tape: struct idetape_tape_t: shorten member names v2

Shorten some member names not too aggressively since this driver might be gone
anyway soon.

Bart:
- minor fixes

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

12 years agoide-tape: struct idetape_tape_t: remove unused members
Borislav Petkov [Wed, 6 Feb 2008 01:57:52 +0000]
ide-tape: struct idetape_tape_t: remove unused members

- last_frame_position: only being written to once
- firmware_revision, product_id, vendor_id: used once, remove from struct
  idetape_tape_t and deal with them locally
- firmware_revision_num: only written to once
- tape_still_time_begin: completely unused
- tape_still_time: never written to; remove corresponding code chunk
- uncontrolled_last_pipeline_head: only once written to
- blocks_in_buffer: only written to

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

12 years agoide-tape: remove typedef idetape_chrdev_direction_t
Borislav Petkov [Wed, 6 Feb 2008 01:57:52 +0000]
ide-tape: remove typedef idetape_chrdev_direction_t

.. and replace it with plain enums.

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

12 years agoide-tape: simplify code branching in the interrupt handler
Borislav Petkov [Wed, 6 Feb 2008 01:57:52 +0000]
ide-tape: simplify code branching in the interrupt handler

... by adding a new typedef function pointer idetape_io_buf in order to call
the proper buffer i/o handler depending on the data direction.

Bart:
- move idetape_io_buf before idetape_pc_intr() comment

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>