7 years agoVFS: Split inode_permission()
David Howells [Mon, 25 Jun 2012 11:55:46 +0000]
VFS: Split inode_permission()

Split inode_permission() into inode- and superblock-dependent parts.

This is aimed at unionmounts where the superblock from the upper layer has to
be checked rather than the superblock from the lower layer as the upper layer
may be writable, thus allowing an unwritable file from the lower layer to be
copied up and modified.

Original-author: Valerie Aurora <vaurora@redhat.com>
Signed-off-by: David Howells <dhowells@redhat.com> (Further development)
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agoVFS: Pass mount flags to sget()
David Howells [Mon, 25 Jun 2012 11:55:37 +0000]
VFS: Pass mount flags to sget()

Pass mount flags to sget() so that it can use them in initialising a new
superblock before the set function is called.  They could also be passed to the
compare function.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agoVFS: Comment mount following code
David Howells [Mon, 25 Jun 2012 11:55:28 +0000]
VFS: Comment mount following code

Add comments describing what the directions "up" and "down" mean and ref count
handling to the VFS mount following family of functions.

Signed-off-by: Valerie Aurora <vaurora@redhat.com> (Original author)
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agoVFS: Make clone_mnt()/copy_tree()/collect_mounts() return errors
David Howells [Mon, 25 Jun 2012 11:55:18 +0000]
VFS: Make clone_mnt()/copy_tree()/collect_mounts() return errors

copy_tree() can theoretically fail in a case other than ENOMEM, but always
returns NULL which is interpreted by callers as -ENOMEM.  Change it to return
an explicit error.

Also change clone_mnt() for consistency and because union mounts will add new
error cases.

Thanks to Andreas Gruenbacher <agruen@suse.de> for a bug fix.
[AV: folded braino fix by Dan Carpenter]

Original-author: Valerie Aurora <vaurora@redhat.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Valerie Aurora <valerie.aurora@gmail.com>
Cc: Andreas Gruenbacher <agruen@suse.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agoVFS: Make chown() and lchown() call fchownat()
David Howells [Mon, 25 Jun 2012 11:55:09 +0000]
VFS: Make chown() and lchown() call fchownat()

Make the chown() and lchown() syscalls jump to the fchownat() syscall with the
appropriate extra arguments.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agodo_dentry_open(): close the race with mark_files_ro() in failure exit
Al Viro [Sat, 23 Jun 2012 18:49:45 +0000]
do_dentry_open(): close the race with mark_files_ro() in failure exit

we want to take it out of mark_files_ro() reach *before* we start
checking if we ought to drop write access.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agomark_files_ro(): don't bother with mntget/mntput
Al Viro [Sat, 23 Jun 2012 18:41:54 +0000]
mark_files_ro(): don't bother with mntget/mntput

mnt_drop_write_file() is safe under any lock

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agonotify_change(): check that i_mutex is held
Andrew Morton [Tue, 19 Jun 2012 23:55:58 +0000]
notify_change(): check that i_mutex is held

Cc: Djalal Harouni <tixxdz@opendz.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agofs: add nd_jump_link
Christoph Hellwig [Mon, 18 Jun 2012 14:47:04 +0000]
fs: add nd_jump_link

Add a helper that abstracts out the jump to an already parsed struct path
from ->follow_link operation from procfs.  Not only does this clean up
the code by moving the two sides of this game into a single helper, but
it also prepares for making struct nameidata private to namei.c

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agofs: move path_put on failure out of ->follow_link
Christoph Hellwig [Mon, 18 Jun 2012 14:47:03 +0000]
fs: move path_put on failure out of ->follow_link

Currently the non-nd_set_link based versions of ->follow_link are expected
to do a path_put(&nd->path) on failure.  This calling convention is unexpected,
undocumented and doesn't match what the nd_set_link-based instances do.

Move the path_put out of the only non-nd_set_link based ->follow_link
instance into the caller.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agodebugfs: get rid of useless arguments to debugfs_{mkdir,symlink}
Al Viro [Sun, 10 Jun 2012 00:40:20 +0000]
debugfs: get rid of useless arguments to debugfs_{mkdir,symlink}

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agodebugfs: fold debugfs_create_by_name() into the only caller
Al Viro [Sun, 10 Jun 2012 00:33:28 +0000]
debugfs: fold debugfs_create_by_name() into the only caller

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agodebugfs: make sure that debugfs_create_file() gets used only for regulars
Al Viro [Sun, 10 Jun 2012 00:28:22 +0000]
debugfs: make sure that debugfs_create_file() gets used only for regulars

It, debugfs_create_dir() and debugfs_create_link() use the common helper
now.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years ago__d_unalias() should refuse to move mountpoints
Al Viro [Fri, 8 Jun 2012 19:59:33 +0000]
__d_unalias() should refuse to move mountpoints

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agosysfs: just use d_materialise_unique()
Al Viro [Fri, 8 Jun 2012 00:56:54 +0000]
sysfs: just use d_materialise_unique()

same as for nfs et.al.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agosysfs: switch to ->s_d_op and ->d_release()
Al Viro [Fri, 8 Jun 2012 00:51:39 +0000]
sysfs: switch to ->s_d_op and ->d_release()

a) ->d_iput() is wrong here - what we do to inode is completely usual, it's
dentry->d_fsdata that we want to drop.  Just use ->d_release().

b) switch to ->s_d_op - no need to play with d_set_d_op()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agoget rid of kern_path_parent()
Al Viro [Thu, 14 Jun 2012 23:01:42 +0000]
get rid of kern_path_parent()

all callers want the same thing, actually - a kinda-sorta analog of
kern_path_create().  I.e. they want parent vfsmount/dentry (with
->i_mutex held, to make sure the child dentry is still their child)
+ the child dentry.

Signed-off-by Al Viro <viro@zeniv.linux.org.uk>

7 years agoVFS: Fix the banner comment on lookup_open()
David Howells [Thu, 14 Jun 2012 15:13:46 +0000]
VFS: Fix the banner comment on lookup_open()

Since commit 197e37d9, the banner comment on lookup_open() no longer matches
what the function returns.  It used to return a struct file pointer or NULL and
now it returns an integer and is passed the struct file pointer it is to use
amongst its arguments.  Update the comment to reflect this.

Also add a banner comment to atomic_open().

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agodon't pass nameidata * to vfs_create()
Al Viro [Sun, 10 Jun 2012 22:09:36 +0000]
don't pass nameidata * to vfs_create()

all we want is a boolean flag, same as the method gets now

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agodon't pass nameidata to ->create()
Al Viro [Sun, 10 Jun 2012 22:05:36 +0000]
don't pass nameidata to ->create()

boolean "does it have to be exclusive?" flag is passed instead;
Local filesystem should just ignore it - the object is guaranteed
not to be there yet.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agofs/namei.c: don't pass nameidata to __lookup_hash() and lookup_real()
Al Viro [Sun, 10 Jun 2012 21:17:17 +0000]
fs/namei.c: don't pass nameidata to __lookup_hash() and lookup_real()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agostop passing nameidata to ->lookup()
Al Viro [Sun, 10 Jun 2012 21:13:09 +0000]
stop passing nameidata to ->lookup()

Just the flags; only NFS cares even about that, but there are
legitimate uses for such argument.  And getting rid of that
completely would require splitting ->lookup() into a couple
of methods (at least), so let's leave that alone for now...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agofs/namei.c: don't pass namedata to lookup_dcache()
Al Viro [Fri, 22 Jun 2012 08:42:10 +0000]
fs/namei.c: don't pass namedata to lookup_dcache()

just the flags...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agofs/namei.c: don't pass nameidata to d_revalidate()
Al Viro [Sun, 10 Jun 2012 20:10:59 +0000]
fs/namei.c: don't pass nameidata to d_revalidate()

since the method wrapped by it doesn't need that anymore...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agostop passing nameidata * to ->d_revalidate()
Al Viro [Sun, 10 Jun 2012 20:03:43 +0000]
stop passing nameidata * to ->d_revalidate()

Just the lookup flags.  Die, bastard, die...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agofs/nfs/dir.c: switch to passing nd->flags instead of nd wherever possible
Al Viro [Sun, 10 Jun 2012 19:36:40 +0000]
fs/nfs/dir.c: switch to passing nd->flags instead of nd wherever possible

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agonfs_lookup_verify_inode() - nd is *always* non-NULL here
Al Viro [Sun, 10 Jun 2012 19:33:51 +0000]
nfs_lookup_verify_inode() - nd is *always* non-NULL here

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agoswitch nfs_lookup_check_intent() away from nameidata
Al Viro [Sun, 10 Jun 2012 19:18:15 +0000]
switch nfs_lookup_check_intent() away from nameidata

just pass the flags

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agodo_dentry_open(): take initialization of file->f_path to caller
Al Viro [Sun, 10 Jun 2012 18:32:45 +0000]
do_dentry_open(): take initialization of file->f_path to caller

... and get rid of a couple of arguments and a pointless reassignment
in finish_open() case.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agofold __dentry_open() into its sole caller
Al Viro [Sun, 10 Jun 2012 18:24:38 +0000]
fold __dentry_open() into its sole caller

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agoswitch do_dentry_open() to returning int
Al Viro [Sun, 10 Jun 2012 18:22:04 +0000]
switch do_dentry_open() to returning int

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agomake finish_no_open() return int
Al Viro [Sun, 10 Jun 2012 10:48:09 +0000]
make finish_no_open() return int

namely, 1 ;-)  That's what we want to return from ->atomic_open()
instances after finish_no_open().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agofs/namei.c: get do_last() and friends return int
Al Viro [Fri, 22 Jun 2012 08:41:10 +0000]
fs/namei.c: get do_last() and friends return int

Same conventions as for ->atomic_open().  Trimmed the
forest of labels a bit, while we are at it...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agokill struct opendata
Al Viro [Fri, 22 Jun 2012 08:40:19 +0000]
kill struct opendata

Just pass struct file *.  Methods are happier that way...
There's no need to return struct file * from finish_open() now,
so let it return int.  Next: saner prototypes for parts in
namei.c

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agokill opendata->{mnt,dentry}
Al Viro [Sun, 10 Jun 2012 09:55:37 +0000]
kill opendata->{mnt,dentry}

->filp->f_path is there for purpose...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agomake ->atomic_open() return int
Al Viro [Fri, 22 Jun 2012 08:39:14 +0000]
make ->atomic_open() return int

Change of calling conventions:
old new
NULL 1
file 0
ERR_PTR(-ve) -ve

Caller *knows* that struct file *; no need to return it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agodon't modify od->filp at all
Al Viro [Sun, 10 Jun 2012 09:04:43 +0000]
don't modify od->filp at all

make put_filp() conditional on flag set by finish_open()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years ago->atomic_open() prototype change - pass int * instead of bool *
Al Viro [Sun, 10 Jun 2012 09:01:45 +0000]
->atomic_open() prototype change - pass int * instead of bool *

... and let finish_open() report having opened the file via that sucker.
Next step: don't modify od->filp at all.

[AV: FILE_CREATE was already used by cifs; Miklos' fix folded]

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agovfs: move O_DIRECT check to common code
Miklos Szeredi [Tue, 5 Jun 2012 13:10:32 +0000]
vfs: move O_DIRECT check to common code

Perform open_check_o_direct() in a common place in do_last after opening the
file.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agovfs: do_last(): clean up retry
Miklos Szeredi [Tue, 5 Jun 2012 13:10:31 +0000]
vfs: do_last(): clean up retry

Move the lookup retry logic to the bottom of the function to make the normal
case simpler to read.

Reported-by: David Howells <dhowells@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agovfs: do_last(): clean up bool
Miklos Szeredi [Tue, 5 Jun 2012 13:10:30 +0000]
vfs: do_last(): clean up bool

Consistently use bool for boolean values in do_last().

Reported-by: David Howells <dhowells@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agovfs: do_last(): clean up labels
Miklos Szeredi [Tue, 5 Jun 2012 13:10:29 +0000]
vfs: do_last(): clean up labels

Reported-by: David Howells <dhowells@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agovfs: do_last(): clean up error handling
Miklos Szeredi [Tue, 5 Jun 2012 13:10:28 +0000]
vfs: do_last(): clean up error handling

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agovfs: remove open intents from nameidata
Miklos Szeredi [Tue, 5 Jun 2012 13:10:27 +0000]
vfs: remove open intents from nameidata

All users of open intents have been converted to use ->atomic_{open,create}.

This patch gets rid of nd->intent.open and related infrastructure.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years ago9p: implement i_op->atomic_open()
Miklos Szeredi [Tue, 5 Jun 2012 13:10:26 +0000]
9p: implement i_op->atomic_open()

Add an ->atomic_open implementation which replaces the atomic open+create
operation implemented via ->create.  No functionality is changed.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
CC: Eric Van Hensbergen <ericvh@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agoceph: implement i_op->atomic_open()
Miklos Szeredi [Tue, 5 Jun 2012 13:10:25 +0000]
ceph: implement i_op->atomic_open()

Add an ->atomic_open implementation which replaces the atomic lookup+open+create
operation implemented via ->lookup and ->create operations.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
CC: Sage Weil <sage@newdream.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agoceph: remove unused arg from ceph_lookup_open()
Miklos Szeredi [Tue, 5 Jun 2012 13:10:24 +0000]
ceph: remove unused arg from ceph_lookup_open()

What was the purpose of this?

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
CC: Sage Weil <sage@newdream.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agocifs: implement i_op->atomic_open()
Miklos Szeredi [Tue, 5 Jun 2012 13:10:23 +0000]
cifs: implement i_op->atomic_open()

Add an ->atomic_open implementation which replaces the atomic lookup+open+create
operation implemented via ->lookup and ->create operations.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
CC: Steve French <sfrench@samba.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agofuse: implement i_op->atomic_open()
Miklos Szeredi [Tue, 5 Jun 2012 13:10:22 +0000]
fuse: implement i_op->atomic_open()

Add an ->atomic_open implementation which replaces the atomic open+create
operation implemented via ->create.  No functionality is changed.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agonfs: don't use intents for checking atomic open
Miklos Szeredi [Tue, 5 Jun 2012 13:10:21 +0000]
nfs: don't use intents for checking atomic open

is_atomic_open() is now only used by nfs4_lookup_revalidate() to check whether
it's okay to skip normal revalidation.

It does a racy check for mount read-onlyness and falls back to normal
revalidation if the open would fail.  This makes little sense now that this
function isn't used for determining whether to actually open the file or not.

The d_mountpoint() check still makes sense since it is an indication that we
might be following a mount and so open may not revalidate the dentry.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
CC: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agonfs: don't use nd->intent.open.flags
Miklos Szeredi [Tue, 5 Jun 2012 13:10:20 +0000]
nfs: don't use nd->intent.open.flags

Instead check LOOKUP_EXCL in nd->flags, which is basically what the open intent
flags were used for.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
CC: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agonfs: clean up ->create in nfs_rpc_ops
Miklos Szeredi [Tue, 5 Jun 2012 13:10:19 +0000]
nfs: clean up ->create in nfs_rpc_ops

Don't pass nfs_open_context() to ->create().  Only the NFS4 implementation
needed that and only because it wanted to return an open file using open
intents.  That task has been replaced by ->atomic_open so it is not necessary
anymore to pass the context to the create rpc operation.

Despite nfs4_proc_create apparently being okay with a NULL context it Oopses
somewhere down the call chain.  So allocate a context here.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
CC: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agonfs: implement i_op->atomic_open()
Miklos Szeredi [Tue, 5 Jun 2012 13:10:18 +0000]
nfs: implement i_op->atomic_open()

Replace NFS4 specific ->lookup implementation with ->atomic_open impelementation
and use the generic nfs_lookup for other lookups.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
CC: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agovfs: add i_op->atomic_open()
Miklos Szeredi [Tue, 5 Jun 2012 13:10:17 +0000]
vfs: add i_op->atomic_open()

Add a new inode operation which is called on the last component of an open.
Using this the filesystem can look up, possibly create and open the file in one
atomic operation.  If it cannot perform this (e.g. the file type turned out to
be wrong) it may signal this by returning NULL instead of an open struct file
pointer.

i_op->atomic_open() is only called if the last component is negative or needs
lookup.  Handling cached positive dentries here doesn't add much value: these
can be opened using f_op->open().  If the cached file turns out to be invalid,
the open can be retried, this time using ->atomic_open() with a fresh dentry.

For now leave the old way of using open intents in lookup and revalidate in
place.  This will be removed once all the users are converted.

David Howells noticed that if ->atomic_open() opens the file but does not create
it, handle_truncate() will be called on it even if it is not a regular file.
Fix this by checking the file type in this case too.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agovfs: lookup_open(): expand lookup_hash()
Miklos Szeredi [Tue, 5 Jun 2012 13:10:16 +0000]
vfs: lookup_open(): expand lookup_hash()

Copy __lookup_hash() into lookup_open().  The next patch will insert the atomic
open call just before the real lookup.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agovfs: add lookup_open()
Miklos Szeredi [Tue, 5 Jun 2012 13:10:15 +0000]
vfs: add lookup_open()

Split out lookup + maybe create from do_last().  This is the part under i_mutex
protection.

The function is called lookup_open() and returns a filp even though the open
part is not used yet.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agovfs: do_last(): common slow lookup
Miklos Szeredi [Tue, 5 Jun 2012 13:10:14 +0000]
vfs: do_last(): common slow lookup

Make the slow lookup part of O_CREAT and non-O_CREAT opens common.

This allows atomic_open to be hooked into the slow lookup part.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agovfs: do_last(): separate O_CREAT specific code
Miklos Szeredi [Tue, 5 Jun 2012 13:10:13 +0000]
vfs: do_last(): separate O_CREAT specific code

Check O_CREAT on the slow lookup paths where necessary.  This allows the rest to
be shared with plain open.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agovfs: do_last(): inline lookup_slow()
Miklos Szeredi [Tue, 5 Jun 2012 13:10:12 +0000]
vfs: do_last(): inline lookup_slow()

Copy lookup_slow() into do_last().

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agonamei.c: let follow_link() do put_link() on failure
Al Viro [Sun, 10 Jun 2012 08:15:17 +0000]
namei.c: let follow_link() do put_link() on failure

no need for kludgy "set cookie to ERR_PTR(...) because we failed
before we did actual ->follow_link() and want to suppress put_link()",
no pointless check in put_link() itself.

Callers checked if follow_link() has failed anyway; might as well
break out of their loops if that happened, without bothering
to call put_link() first.

[AV: folded fixes from hch]

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agocoda: use list_for_each_entry
Al Viro [Sat, 9 Jun 2012 23:52:19 +0000]
coda: use list_for_each_entry

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agovfs: switch i_dentry/d_alias to hlist
Al Viro [Sat, 9 Jun 2012 17:51:19 +0000]
vfs: switch i_dentry/d_alias to hlist

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agoext4: get rid of open-coded d_find_any_alias()
Al Viro [Sat, 9 Jun 2012 17:19:12 +0000]
ext4: get rid of open-coded d_find_any_alias()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agoocfs2: use list_for_each_entry in ocfs2_find_local_alias()
Al Viro [Sat, 9 Jun 2012 17:09:15 +0000]
ocfs2: use list_for_each_entry in ocfs2_find_local_alias()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agoaffs: unobfuscate affs_fix_dcache()
Al Viro [Sat, 9 Jun 2012 17:06:09 +0000]
affs: unobfuscate affs_fix_dcache()

and add a comment on what it's doing

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agoaffs: get rid of open-coded list_for_each_entry()
Al Viro [Sat, 9 Jun 2012 17:03:04 +0000]
affs: get rid of open-coded list_for_each_entry()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agovfs: update documentation on ->i_dentry handling
Al Viro [Sat, 9 Jun 2012 15:55:20 +0000]
vfs: update documentation on ->i_dentry handling

we used to need to clean it in RCU callback freeing an inode;
in 3.2 that requirement went away.  Unfortunately, it hadn't
been reflected in Documentation/filesystems/porting.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agoadfs: don't bother with ->i_dentry in ->destroy_inode()
Al Viro [Sat, 9 Jun 2012 15:51:12 +0000]
adfs: don't bother with ->i_dentry in ->destroy_inode()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agocifs: don't bother with ->i_dentry in ->destroy_inode()
Al Viro [Sat, 9 Jun 2012 15:50:36 +0000]
cifs: don't bother with ->i_dentry in ->destroy_inode()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agoqnx6: don't bother with ->i_dentry in inode-freeing callback
Al Viro [Sat, 9 Jun 2012 15:49:04 +0000]
qnx6: don't bother with ->i_dentry in inode-freeing callback

we'll initialize it in inode_init_always() when we allocate that
object again.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agoget rid of magic in proc_namespace.c
Al Viro [Sat, 9 Jun 2012 05:16:59 +0000]
get rid of magic in proc_namespace.c

don't rely on proc_mounts->m being the first field; container_of()
is there for purpose.  No need to bother with ->private, while
we are at it - the same container_of will do nicely.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agoget rid of ->mnt_longterm
Al Viro [Sat, 9 Jun 2012 04:59:08 +0000]
get rid of ->mnt_longterm

it's enough to set ->mnt_ns of internal vfsmounts to something
distinct from all struct mnt_namespace out there; then we can
just use the check for ->mnt_ns != NULL in the fast path of
mntput_no_expire()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agofs/direct-io.c: adjust suspicious bit operation
Julia Lawall [Thu, 7 Jun 2012 22:45:00 +0000]
fs/direct-io.c: adjust suspicious bit operation

READ is 0, so the result of the bit-and operation is 0.  Rewrite with == as
done elsewhere in the same file.

This problem was found using Coccinelle (http://coccinelle.lip6.fr/).

Signed-off-by: Julia Lawall <julia@diku.dk>
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agoaffs: get rid of affs_sync_super
Artem Bityutskiy [Wed, 6 Jun 2012 15:56:57 +0000]
affs: get rid of affs_sync_super

This patch makes affs stop using the VFS '->write_super()' method along with
the 's_dirt' superblock flag, because they are on their way out.

The whole "superblock write-out" VFS infrastructure is served by the
'sync_supers()' kernel thread, which wakes up every 5 (by default) seconds and
writes out all dirty superblocks using the '->write_super()' call-back.  But the
problem with this thread is that it wastes power by waking up the system every
5 seconds, even if there are no diry superblocks, or there are no client
file-systems which would need this (e.g., btrfs does not use
'->write_super()'). So we want to kill it completely and thus, we need to make
file-systems to stop using the '->write_super()' VFS service, and then remove
it together with the kernel thread.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agoaffs: introduce VFS superblock object back-reference
Artem Bityutskiy [Wed, 6 Jun 2012 15:56:56 +0000]
affs: introduce VFS superblock object back-reference

Add an 'sb' VFS superblock back-reference to the 'struct affs_sb_info' data
structure - we will need to find the VFS superblock from a 'struct
affs_sb_info' object in the next patch, so this change is jut a preparation.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agoaffs: stop using lock_super
Artem Bityutskiy [Wed, 6 Jun 2012 15:56:55 +0000]
affs: stop using lock_super

The VFS's 'lock_super()' and 'unlock_super()' calls are deprecated and unwanted
and just wait for a brave knight who'd kill them. This patch makes AFFS stop
using them and use the buffer-head's own lock instead.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agoaffs: re-structure superblock locking a bit
Artem Bityutskiy [Wed, 6 Jun 2012 15:56:54 +0000]
affs: re-structure superblock locking a bit

AFFS wants to serialize the superblock (the root block in AFFS terms) updates
and uses 'lock_super()/unlock_super()' for these purposes. This patch pushes the
locking down to the 'affs_commit_super()' from the callers.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agoaffs: remove useless superblock writeout on remount
Artem Bityutskiy [Wed, 6 Jun 2012 15:56:53 +0000]
affs: remove useless superblock writeout on remount

We do not need to write out the superblock from '->remount_fs()' because
VFS has already called '->sync_fs()' by this time and the superblock has
already been written out. Thus, remove the 'affs_write_super()'
infocation from 'affs_remount()'.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agoaffs: remove useless superblock writeout on unmount
Artem Bityutskiy [Wed, 6 Jun 2012 15:56:52 +0000]
affs: remove useless superblock writeout on unmount

We do not need to write out the superblock from '->put_super()' because VFS has
already called '->sync_fs()' by this time and the superblock has already been
written out. Thus, remove the 'affs_commit_super()' infocation from
'affs_put_super()'.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agoaffs: stop setting bm_flags
Artem Bityutskiy [Wed, 6 Jun 2012 15:56:51 +0000]
affs: stop setting bm_flags

AFFS stores values '1' and '2' in 'bm_flags', and I fail to see any logic when
it prefers one or another. AFFS writes '1' only from '->put_super()', while
'->sync_fs()' and '->write_super()' store value '2'.  So on the first glance,
it looks like we want to have '1' if we unmount.  However, this does not really
happen in these cases:
  1. superblock is written via 'write_super()' then we unmount;
  2. we re-mount R/O, then unmount.
which are quite typical.

I could not find good documentation describing this field, except of one random
piece of documentation in the internet which says that -1 means that the root
block is valid, which is not consistent with what we have in the Linux AFFS
driver.

Jan Kara commented on this: "I have some vague recollection that on Amiga
boolean was usually encoded as: 0 == false, ~0 == -1 == true. But it has been
ages..."

Thus, my conclusion is that value of '1' is as good as value of '2' and we can
just always use '2'. An Jan Kara suggested to go further: "generally bm_flags
handling looks strange. If they are 0, we mount fs read only and thus cannot
change them.  If they are != 0, we write 2 there. So IMHO if you just removed
bm_flags setting, nothing will really happen."

So this patch removes the bm_flags setting completely. This makes the "clean"
argument of the 'affs_commit_super()' function unneeded, so it is also removed.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 years agoMerge tag 'md-3.5-fixes' of git://neil.brown.name/md
Linus Torvalds [Sat, 14 Jul 2012 00:59:33 +0000]
Merge tag 'md-3.5-fixes' of git://neil.brown.name/md

Pull use-after-free RAID1 bugfix from NeilBrown.

* tag 'md-3.5-fixes' of git://neil.brown.name/md:
  md/raid1: fix use-after-free bug in RAID1 data-check code.

7 years agoMerge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 13 Jul 2012 22:31:21 +0000]
Merge branch 'timers-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull the leap second fixes from Thomas Gleixner:
 "It's a rather large series, but well discussed, refined and reviewed.
  It got a massive testing by John, Prarit and tip.

  In theory we could split it into two parts.  The first two patches

    f55a6faa3843: hrtimer: Provide clock_was_set_delayed()
    4873fa070ae8: timekeeping: Fix leapsecond triggered load spike issue

  are merely preventing the stuff loops forever issues, which people
  have observed.

  But there is no point in delaying the other 4 commits which achieve
  full correctness into 3.6 as they are tagged for stable anyway.  And I
  rather prefer to have the full fixes merged in bulk than a "prevent
  the observable wreckage and deal with the hidden fallout later"
  approach."

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  hrtimer: Update hrtimer base offsets each hrtimer_interrupt
  timekeeping: Provide hrtimer update function
  hrtimers: Move lock held region in hrtimer_interrupt()
  timekeeping: Maintain ktime_t based offsets for hrtimers
  timekeeping: Fix leapsecond triggered load spike issue
  hrtimer: Provide clock_was_set_delayed()

7 years agox86/vsyscall: allow seccomp filter in vsyscall=emulate
Will Drewry [Fri, 13 Jul 2012 17:06:35 +0000]
x86/vsyscall: allow seccomp filter in vsyscall=emulate

If a seccomp filter program is installed, older static binaries and
distributions with older libc implementations (glibc 2.13 and earlier)
that rely on vsyscall use will be terminated regardless of the filter
program policy when executing time, gettimeofday, or getcpu.  This is
only the case when vsyscall emulation is in use (vsyscall=emulate is the
default).

This patch emulates system call entry inside a vsyscall=emulate by
populating regs->ax and regs->orig_ax with the system call number prior
to calling into seccomp such that all seccomp-dependencies function
normally.  Additionally, system call return behavior is emulated in line
with other vsyscall entrypoints for the trace/trap cases.

[ v2: fixed ip and sp on SECCOMP_RET_TRAP/TRACE (thanks to luto@mit.edu) ]
Reported-and-tested-by: Owen Kibel <qmewlo@gmail.com>
Signed-off-by: Will Drewry <wad@chromium.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

7 years agoMerge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelv...
Linus Torvalds [Fri, 13 Jul 2012 18:01:03 +0000]
Merge branch 'hwmon-for-linus' of git://git./linux/kernel/git/jdelvare/staging

Please pull one hwmon subsystem fix from Jean Delvare.

* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
  hwmon: (it87) Preserve configuration register bits on init

7 years agoMerge tag 'nfs-for-3.5-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Linus Torvalds [Fri, 13 Jul 2012 17:58:45 +0000]
Merge tag 'nfs-for-3.5-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client bugfixes from Trond Myklebust:
 - Fix an NFSv4 mount regression
 - Fix O_DIRECT list manipulation snafus

* tag 'nfs-for-3.5-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  NFSv4: Fix an NFSv4 mount regression
  NFS: Fix list manipulation snafus in fs/nfs/direct.c

7 years agoRemove easily user-triggerable BUG from generic_setlease
Dave Jones [Fri, 13 Jul 2012 17:35:36 +0000]
Remove easily user-triggerable BUG from generic_setlease

This can be trivially triggered from userspace by passing in something unexpected.

    kernel BUG at fs/locks.c:1468!
    invalid opcode: 0000 [#1] SMP
    RIP: 0010:generic_setlease+0xc2/0x100
    Call Trace:
      __vfs_setlease+0x35/0x40
      fcntl_setlease+0x76/0x150
      sys_fcntl+0x1c6/0x810
      system_call_fastpath+0x1a/0x1f

Signed-off-by: Dave Jones <davej@redhat.com>
Cc: stable@kernel.org # 3.2+
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

7 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Linus Torvalds [Fri, 13 Jul 2012 17:33:18 +0000]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input

Pull input layer fixes from Dmitry Torokhov:
 "The changes are limited to adding new VID/PID combinations to drivers
  to enable support for new versions of hardware, most notably hardware
  found in new MacBook Pro Retina boxes."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: xpad - add Andamiro Pump It Up pad
  Input: xpad - add signature for Razer Onza Tournament Edition
  Input: xpad - handle all variations of Mad Catz Beat Pad
  Input: bcm5974 - Add support for 2012 MacBook Pro Retina
  HID: add support for 2012 MacBook Pro Retina

7 years agoMerge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
Linus Torvalds [Fri, 13 Jul 2012 17:29:41 +0000]
Merge branch 'v4l_for_linus' of git://git./linux/kernel/git/mchehab/linux-media

Pull media fixes from Mauro Carvalho Chehab:
 - Some regression fixes at the audio part for devices with
   cx23885/cx25840
 - A DMA corruption fix at cx231xx
 - two fixes at the winbond IR driver
 - Several fixes for the EXYNOS media driver (s5p)
 - two fixes at the OMAP3 preview driver
 - one fix at the dvb core failure path
 - an include missing (slab.h) at smiapp-core causing compilation
   breakage
 - em28xx was not loading the IR driver driver anymore.

* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (31 commits)
  [media] Revert "[media] V4L: JPEG class documentation corrections"
  [media] s5p-fimc: Add missing FIMC-LITE file operations locking
  [media] omap3isp: preview: Fix contrast and brightness handling
  [media] omap3isp: preview: Fix output size computation depending on input format
  [media] winbond-cir: Initialise timeout, driver_type and allowed_protos
  [media] winbond-cir: Fix txandrx module info
  [media] cx23885: Silence unknown command warnings
  [media] cx23885: add support for HVR-1255 analog (cx23888 variant)
  [media] cx23885: make analog support work for HVR_1250 (cx23885 variant)
  [media] cx25840: fix vsrc/hsrc usage on cx23888 designs
  [media] cx25840: fix regression in HVR-1800 analog audio
  [media] cx25840: fix regression in analog support hue/saturation controls
  [media] cx25840: fix regression in HVR-1800 analog support
  [media] s5p-mfc: Fixed setup of custom controls in decoder and encoder
  [media] cx231xx: don't DMA to random addresses
  [media] em28xx: fix em28xx-rc load
  [media] dvb-core: Release semaphore on error path dvb_register_device()
  [media] s5p-fimc: Stop media entity pipeline if fimc_pipeline_validate fails
  [media] s5p-fimc: Fix compiler warning in fimc-lite.c
  [media] s5p-fimc: media_entity_pipeline_start() may fail
  ...

7 years agoMerge tag 'mmc-fixes-for-3.5-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Fri, 13 Jul 2012 17:27:25 +0000]
Merge tag 'mmc-fixes-for-3.5-rc7' of git://git./linux/kernel/git/cjb/mmc

Pull MMC fixes from Chris Ball:
 - Revert a patch that made failing to select power class fatal;
   it turns out that it fails non-fatally on Tegra boards.
   Regression against 3.5-rc1.
 - Add the IRQF_ONESHOT flag to the cd-gpio driver, which turned
   into a regression in 3.5-rc1 when IRQF_ONESHOT became required
   for threaded IRQs with no handler.

* tag 'mmc-fixes-for-3.5-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc:
  mmc: cd-gpio: pass IRQF_ONESHOT to request_threaded_irq()
  mmc: core: Revert "skip card initialization if power class selection fails"

7 years agoMerge tag 'for-linus-20120712' of git://git.infradead.org/linux-mtd
Linus Torvalds [Fri, 13 Jul 2012 16:56:26 +0000]
Merge tag 'for-linus-20120712' of git://git.infradead.org/linux-mtd

Pull late MTD fixes from David Woodhouse:
 - fix 'sparse warning fix' regression which totally breaks MXC NAND
 - fix GPMI NAND regression when used with UBI
 - update/correct sysfs documentation for new 'bitflip_threshold' field
 - fix nandsim build failure

* tag 'for-linus-20120712' of git://git.infradead.org/linux-mtd:
  mtd: nandsim: don't open code a do_div helper
  mtd: ABI documentation: clarification of bitflip_threshold
  mtd: gpmi-nand: fix read page when reading to vmalloced area
  mtd: mxc_nand: use 32bit copy functions

7 years agoMerge tag 'mfd-for-linus-3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo...
Linus Torvalds [Fri, 13 Jul 2012 16:54:26 +0000]
Merge tag 'mfd-for-linus-3.5' of git://git./linux/kernel/git/sameo/mfd-2.6

Pull MFD Fixes from Samuel Ortiz:
 - Three Palmas fixes, One of them being a build error fix.
 - Two mc13xx fixes.  One for fixing an SPI regmap configuration and
   another one for working around an i.Mx hardware bug.
 - One omap-usb regression fix.
 - One twl6040 build breakage fix.
 - One file deletion (ab5500-core.h) that was overlooked during the last
   merge window.

* tag 'mfd-for-linus-3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6:
  mfd: Add missing hunk to change palmas irq to clear on read
  mfd: Fix palmas regulator pdata missing
  mfd: USB: Fix the omap-usb EHCI ULPI PHY reset fix issues.
  mfd: Update twl6040 Kconfig to avoid build breakage
  mfd: Delete ab5500-core.h
  mfd: mc13xxx workaround SPI hardware bug on i.Mx
  mfd: Fix mc13xxx SPI regmap
  mfd: Add terminating entry for i2c_device_id palmas table

7 years agoMerge tag 'sh-for-linus' of git://github.com/pmundt/linux-sh
Linus Torvalds [Fri, 13 Jul 2012 16:04:00 +0000]
Merge tag 'sh-for-linus' of git://github.com/pmundt/linux-sh

Pull SuperH fixes from Paul Mundt.

* tag 'sh-for-linus' of git://github.com/pmundt/linux-sh:
  SH: Convert out[bwl] macros to inline functions
  sh: Fix up se7721 GPIOLIB=y build warnings.

7 years agoMerge git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Fri, 13 Jul 2012 15:42:32 +0000]
Merge git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull a couple of KVM fixes from Avi Kivity:
 "One is an adjustment for an irq layer change that affected device
  assignment, the other a one-liner ppc fix."

* git://git.kernel.org/pub/scm/virt/kvm/kvm:
  powerpc/kvm: Fix "PR" KVM implementation of H_CEDE
  KVM: Fix device assignment threaded irq handler

7 years agoblock: fix infinite loop in __getblk_slow
Jeff Moyer [Thu, 12 Jul 2012 13:43:14 +0000]
block: fix infinite loop in __getblk_slow

Commit 080399aaaf35 ("block: don't mark buffers beyond end of disk as
mapped") exposed a bug in __getblk_slow that causes mount to hang as it
loops infinitely waiting for a buffer that lies beyond the end of the
disk to become uptodate.

The problem was initially reported by Torsten Hilbrich here:

    https://lkml.org/lkml/2012/6/18/54

and also reported independently here:

    http://www.sysresccd.org/forums/viewtopic.php?f=13&t=4511

and then Richard W.M.  Jones and Marcos Mello noted a few separate
bugzillas also associated with the same issue.  This patch has been
confirmed to fix:

    https://bugzilla.redhat.com/show_bug.cgi?id=835019

The main problem is here, in __getblk_slow:

        for (;;) {
                struct buffer_head * bh;
                int ret;

                bh = __find_get_block(bdev, block, size);
                if (bh)
                        return bh;

                ret = grow_buffers(bdev, block, size);
                if (ret < 0)
                        return NULL;
                if (ret == 0)
                        free_more_memory();
        }

__find_get_block does not find the block, since it will not be marked as
mapped, and so grow_buffers is called to fill in the buffers for the
associated page.  I believe the for (;;) loop is there primarily to
retry in the case of memory pressure keeping grow_buffers from
succeeding.  However, we also continue to loop for other cases, like the
block lying beond the end of the disk.  So, the fix I came up with is to
only loop when grow_buffers fails due to memory allocation issues
(return value of 0).

The attached patch was tested by myself, Torsten, and Rich, and was
found to resolve the problem in call cases.

Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Reported-and-Tested-by: Torsten Hilbrich <torsten.hilbrich@secunet.com>
Tested-by: Richard W.M. Jones <rjones@redhat.com>
Reviewed-by: Josh Boyer <jwboyer@redhat.com>
Cc: Stable <stable@vger.kernel.org> # 3.0+
[ Jens is on vacation, taking this directly  - Linus ]
--
Stable Notes: this patch requires backport to 3.0, 3.2 and 3.3.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

7 years agoInput: xpad - add Andamiro Pump It Up pad
Yuri Khan [Thu, 12 Jul 2012 05:12:31 +0000]
Input: xpad - add Andamiro Pump It Up pad

I couldn't find the vendor ID in any of the online databases, but this
mat has a Pump It Up logo on the top side of the controller compartment,
and a disclaimer stating that Andamiro will not be liable on the bottom.

Signed-off-by: Yuri Khan <yurivkhan@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

7 years agohwmon: (it87) Preserve configuration register bits on init
Jean Delvare [Thu, 12 Jul 2012 20:47:37 +0000]
hwmon: (it87) Preserve configuration register bits on init

We were accidentally losing one bit in the configuration register on
device initialization. It was reported to freeze one specific system
right away. Properly preserve all bits we don't explicitly want to
change in order to prevent that.

Reported-by: Stevie Trujillo <stevie.trujillo@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>

7 years agoSH: Convert out[bwl] macros to inline functions
Corey Minyard [Mon, 9 Jul 2012 20:35:20 +0000]
SH: Convert out[bwl] macros to inline functions

The macros just called BUG(), but that results in unused variable
warnings all over the place, like in the IPMI driver.  The build
regression emails were annoying me, so here's the fix.  I have
not even compile tested this, but it's rather obvious.

[ port type mangled to unsigned long ]

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

7 years agoMerge tag 'fbdev-fixes-for-3.5-2' of git://github.com/schandinat/linux-2.6
Linus Torvalds [Wed, 11 Jul 2012 23:17:14 +0000]
Merge tag 'fbdev-fixes-for-3.5-2' of git://github.com/schandinat/linux-2.6

Pull fbdev fixes from Florian Tobias Schandinat:
 "Two fixes for OMAPDSS by Tomi Valkeinen:
   - one to avoid warnings when runtime PM is not enabled
   - one workaround to dependancy issues during suspend/resume"

* tag 'fbdev-fixes-for-3.5-2' of git://github.com/schandinat/linux-2.6:
  OMAPDSS: fix warnings if CONFIG_PM_RUNTIME=n
  OMAPDSS: Use PM notifiers for system suspend

7 years agoMerge branch 'akpm' (Andrew's patch-bomb)
Linus Torvalds [Wed, 11 Jul 2012 23:06:54 +0000]
Merge branch 'akpm' (Andrew's patch-bomb)

Merge random patches from Andrew Morton.

* Merge emailed patches from Andrew Morton <akpm@linux-foundation.org>: (32 commits)
  memblock: free allocated memblock_reserved_regions later
  mm: sparse: fix usemap allocation above node descriptor section
  mm: sparse: fix section usemap placement calculation
  xtensa: fix incorrect memset
  shmem: cleanup shmem_add_to_page_cache
  shmem: fix negative rss in memcg memory.stat
  tmpfs: revert SEEK_DATA and SEEK_HOLE
  drivers/rtc/rtc-twl.c: fix threaded IRQ to use IRQF_ONESHOT
  fat: fix non-atomic NFS i_pos read
  MAINTAINERS: add OMAP CPUfreq driver to OMAP Power Management section
  sgi-xp: nested calls to spin_lock_irqsave()
  fs: ramfs: file-nommu: add SetPageUptodate()
  drivers/rtc/rtc-mxc.c: fix irq enabled interrupts warning
  mm/memory_hotplug.c: release memory resources if hotadd_new_pgdat() fails
  h8300/uaccess: add mising __clear_user()
  h8300/uaccess: remove assignment to __gu_val in unhandled case of get_user()
  h8300/time: add missing #include <asm/irq_regs.h>
  h8300/signal: fix typo "statis"
  h8300/pgtable: add missing #include <asm-generic/pgtable.h>
  drivers/rtc/rtc-ab8500.c: ensure correct probing of the AB8500 RTC when Device Tree is enabled
  ...

7 years agomemblock: free allocated memblock_reserved_regions later
Yinghai Lu [Wed, 11 Jul 2012 21:02:56 +0000]
memblock: free allocated memblock_reserved_regions later

memblock_free_reserved_regions() calls memblock_free(), but
memblock_free() would double reserved.regions too, so we could free the
old range for reserved.regions.

Also tj said there is another bug which could be related to this.

| I don't think we're saving any noticeable
| amount by doing this "free - give it to page allocator - reserve
| again" dancing.  We should just allocate regions aligned to page
| boundaries and free them later when memblock is no longer in use.

in that case, when DEBUG_PAGEALLOC, will get panic:

     memblock_free: [0x0000102febc080-0x0000102febf080] memblock_free_reserved_regions+0x37/0x39
  BUG: unable to handle kernel paging request at ffff88102febd948
  IP: [<ffffffff836a5774>] __next_free_mem_range+0x9b/0x155
  PGD 4826063 PUD cf67a067 PMD cf7fa067 PTE 800000102febd160
  Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
  CPU 0
  Pid: 0, comm: swapper Not tainted 3.5.0-rc2-next-20120614-sasha #447
  RIP: 0010:[<ffffffff836a5774>]  [<ffffffff836a5774>] __next_free_mem_range+0x9b/0x155

See the discussion at https://lkml.org/lkml/2012/6/13/469

So try to allocate with PAGE_SIZE alignment and free it later.

Reported-by: Sasha Levin <levinsasha928@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>