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author | Vegard Nossum <vegard.nossum@gmail.com> | 2008-08-31 23:39:21 +0200 |
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committer | Thomas Gleixner <tglx@linutronix.de> | 2008-09-01 09:47:16 +0200 |
commit | 673d62cc5ea6fca046650f17f77985b112c62322 (patch) | |
tree | 7cde0d756ffa71ad732cc079d28254b256c14e68 /Documentation | |
parent | bef69ea0dcce574a425feb0a5aa4c63dd108b9a6 (diff) | |
download | kernel_samsung_smdk4412-673d62cc5ea6fca046650f17f77985b112c62322.zip kernel_samsung_smdk4412-673d62cc5ea6fca046650f17f77985b112c62322.tar.gz kernel_samsung_smdk4412-673d62cc5ea6fca046650f17f77985b112c62322.tar.bz2 |
debugobjects: fix lockdep warning
Daniel J. Blueman reported:
> =======================================================
> [ INFO: possible circular locking dependency detected ]
> 2.6.27-rc4-224c #1
> -------------------------------------------------------
> hald/4680 is trying to acquire lock:
> (&n->list_lock){++..}, at: [<ffffffff802bfa26>] add_partial+0x26/0x80
>
> but task is already holding lock:
> (&obj_hash[i].lock){++..}, at: [<ffffffff8041cfdc>]
> debug_object_free+0x5c/0x120
We fix it by moving the actual freeing to outside the lock (the lock
now only protects the list).
The pool lock is also promoted to irq-safe (suggested by Dan). It's
necessary because free_pool is now called outside the irq disabled
region. So we need to protect against an interrupt handler which calls
debug_object_init().
[tglx@linutronix.de: added hlist_move_list helper to avoid looping
through the list twice]
Reported-by: Daniel J Blueman <daniel.blueman@gmail.com>
Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions