lkml.org 
[lkml]   [2011]   [Jul]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [tip:core/locking] lockdep: Fix lockdep_no_validate against IRQ states
tip-bot for Peter Zijlstra wrote:
> Commit-ID: efbe2eee6dc0f179be84292bf269528b3ec365e9
> Gitweb: http://git.kernel.org/tip/efbe2eee6dc0f179be84292bf269528b3ec365e9
> Author: Peter Zijlstra <a.p.zijlstra@chello.nl>
> AuthorDate: Thu, 7 Jul 2011 11:39:45 +0200
> Committer: Ingo Molnar <mingo@elte.hu>
> CommitDate: Thu, 21 Jul 2011 20:43:16 +0200
>
> lockdep: Fix lockdep_no_validate against IRQ states
>
> Thomas noticed that a lock marked with lockdep_set_novalidate_class()
> will still trigger warnings for IRQ inversions. Cure this by skipping
> those when marking irq state.
>
> Reported-and-tested-by: Thomas Gleixner <tglx@linutronix.de>
> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
> Link: http://lkml.kernel.org/n/tip-2dp5vmpsxeraqm42kgww6ge2@git.kernel.org
> Signed-off-by: Ingo Molnar <mingo@elte.hu>
> ---
> kernel/lockdep.c | 3 +++
> 1 files changed, 3 insertions(+), 0 deletions(-)
>
> diff --git a/kernel/lockdep.c b/kernel/lockdep.c
> index 298c927..628276d 100644
> --- a/kernel/lockdep.c
> +++ b/kernel/lockdep.c
> @@ -2468,6 +2468,9 @@ mark_held_locks(struct task_struct *curr, enum mark_type mark)
>
> BUG_ON(usage_bit >= LOCK_USAGE_STATES);
>
> + if (hlock_class(hlock)->key == &__lockdep_no_validate__)
> + continue;
> +

The 2 pointers are not the same type.

kernel/lockdep.c: In function 'mark_held_locks':
kernel/lockdep.c:2471:31: warning: comparison of distinct pointer types lacks a cast

> if (!mark_lock(curr, hlock, usage_bit))
> return 0;
> }


\
 
 \ /
  Last update: 2011-07-29 05:41    [W:0.051 / U:0.120 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site