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| author | Waiman Long <longman@redhat.com> | 2018-10-02 16:19:17 -0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2018-10-03 08:46:02 +0200 |
| commit | 8ee10862476ef8b9e81e5b521205fd5c620b4ffb (patch) | |
| tree | 1a84b111fdc5b1ce298da14c4b951be6e377f534 /kernel/kexec_file.c | |
| parent | 44318d5b07be7d7cfe718aa22ea3b2577361a0b5 (diff) | |
| download | linux-next-8ee10862476ef8b9e81e5b521205fd5c620b4ffb.tar.gz | |
locking/lockdep: Eliminate redundant IRQs check in __lock_acquire()
The static __lock_acquire() function has only two callers:
1) lock_acquire()
2) reacquire_held_locks()
In lock_acquire(), raw_local_irq_save() is called beforehand. So
IRQs must have been disabled. So the check:
DEBUG_LOCKS_WARN_ON(!irqs_disabled())
is kind of redundant in this case. So move the above check
to reacquire_held_locks() to eliminate redundant code in the
lock_acquire() path.
Signed-off-by: Waiman Long <longman@redhat.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will.deacon@arm.com>
Link: http://lkml.kernel.org/r/1538511560-10090-3-git-send-email-longman@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/kexec_file.c')
0 files changed, 0 insertions, 0 deletions