commit d8c89eb3a12f0da96d049bd515c7fa3702e511c5
Merge: 456ef15... fb1dac9...
Author: Linus Torvalds <torvalds@woody.linux-foundation.org>
Date:   Wed Jan 16 09:55:49 2008 -0800

    Merge branch 'v2.6.24-rc7-lockdep' of git://git.kernel.org/pub/scm/linux/kernel/git/peterz/linux-2.6-lockdep
    
    * 'v2.6.24-rc7-lockdep' of git://git.kernel.org/pub/scm/linux/kernel/git/peterz/linux-2.6-lockdep:
      lockdep: more hardirq annotations for notify_die()
      lockdep: fix workqueue creation API lockdep interaction
      lockdep: fix internal double unlock during self-test

commit 456ef1553cb2b06729d64c1d1f0f2bda34e9b201
Author: Tejun Heo <htejun@gmail.com>
Date:   Wed Jan 16 12:10:53 2008 +0900

    sysfs: fix bugs in sysfs_rename/move_dir()
    
    sysfs_rename/move_dir() have the following bugs.
    
     - On dentry lookup failure, kfree() is called on ERR_PTR() value.
     - sysfs_move_dir() has an extra dput() on success path.
    
    Fix them.
    
    Signed-off-by: Tejun Heo <htejun@gmail.com>
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

commit e49452c67703d3647467d65275fb893589384fed
Author: Tejun Heo <htejun@gmail.com>
Date:   Wed Jan 16 12:06:14 2008 +0900

    sysfs: make sysfs_lookup() return ERR_PTR(-ENOENT) on failed lookup
    
    sysfs tries to keep dcache a strict subset of sysfs_dirent tree by
    shooting down dentries when a node is removed, that is, no negative
    dentry for sysfs.  However, the lookup function returned NULL and thus
    created negative dentries when the target node didn't exist.
    
    Make sysfs_lookup() return ERR_PTR(-ENOENT) on lookup failure.  This
    fixes the NULL dereference bug in sysfs_get_dentry() discovered by
    bluetooth rfcomm device moving around.
    
    Signed-off-by: Tejun Heo <htejun@gmail.com>
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

commit fb1dac909d94ff807cd833d340c6827c3a957159
Author: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date:   Wed Jan 16 09:51:59 2008 +0100

    lockdep: more hardirq annotations for notify_die()
    On Sat, 2007-12-29 at 18:06 +0100, Marcin Slusarz wrote:
    > Hi
    > Today I've got this (while i was upgrading my gentoo box):
    >
    > WARNING: at kernel/lockdep.c:2658 check_flags()
    > Pid: 21680, comm: conftest Not tainted 2.6.24-rc6 #63
    >
    > Call Trace:
    >  [<ffffffff80253457>] check_flags+0x1c7/0x1d0
    >  [<ffffffff80257217>] lock_acquire+0x57/0xc0
    >  [<ffffffff8024d5c0>] __atomic_notifier_call_chain+0x60/0xd0
    >  [<ffffffff8024d641>] atomic_notifier_call_chain+0x11/0x20
    >  [<ffffffff8024d67e>] notify_die+0x2e/0x30
    >  [<ffffffff8020da0a>] do_divide_error+0x5a/0xa0
    >  [<ffffffff80522bdd>] trace_hardirqs_on_thunk+0x35/0x3a
    >  [<ffffffff80255b89>] trace_hardirqs_on+0xd9/0x180
    >  [<ffffffff80522bdd>] trace_hardirqs_on_thunk+0x35/0x3a
    >  [<ffffffff80523c2d>] error_exit+0x0/0xa9
    >
    > possible reason: unannotated irqs-off.
    > irq event stamp: 4693
    > hardirqs last  enabled at (4693): [<ffffffff80522bdd>] trace_hardirqs_on_thunk+0x35/0x3a
    > hardirqs last disabled at (4692): [<ffffffff80522c17>] trace_hardirqs_off_thunk+0x35/0x37
    > softirqs last  enabled at (3546): [<ffffffff80238343>] __do_softirq+0xb3/0xd0
    > softirqs last disabled at (3521): [<ffffffff8020c97c>] call_softirq+0x1c/0x30
    
    more early fixups for notify_die()..
    
    Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
    Signed-off-by: Ingo Molnar <mingo@elte.hu>

commit eb13ba873881abd5e15af784756a61af635e665e
Author: Johannes Berg <johannes@sipsolutions.net>
Date:   Wed Jan 16 09:51:58 2008 +0100

    lockdep: fix workqueue creation API lockdep interaction
    Dave Young reported warnings from lockdep that the workqueue API
    can sometimes try to register lockdep classes with the same key
    but different names. This is not permitted in lockdep.
    
    Unfortunately, I was unaware of that restriction when I wrote
    the code to debug workqueue problems with lockdep and used the
    workqueue name as the lockdep class name. This can obviously
    lead to the problem if the workqueue name is dynamic.
    
    This patch solves the problem by always using a constant name
    for the workqueue's lockdep class, namely either the constant
    name that was passed in or a string consisting of the variable
    name.
    
    Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
    Signed-off-by: Ingo Molnar <mingo@elte.hu>
    Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>

commit 5a26db5bd25cf4bf32ae9fa9f6136b6b6d5b45c5
Author: Nick Piggin <npiggin@suse.de>
Date:   Wed Jan 16 09:51:58 2008 +0100

    lockdep: fix internal double unlock during self-test
    Lockdep, during self-test (when it was simulating double unlocks) was
    sometimes unconditionally unlocking a spinlock when it had not been
    locked. This won't work for ticket locks.
    
    Signed-off-by: Nick Piggin <npiggin@suse.de>
    Signed-off-by: Ingo Molnar <mingo@elte.hu>
    Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>