irq_work: Slightly simplify IRQ_WORK_PENDING clearing

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Instead of fetching the value of flags and perform an xchg() to clear
a bit, just use atomic_fetch_andnot() that is more suitable to do that
job in one operation while keeping the full ordering.

Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E . McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20191108160858.31665-4-frederic@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

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Frederic Weisbecker 2019-11-08 17:08:57 +01:00 • committed by Ingo Molnar

parent 25269871db

commit feb4a51323

1 changed files with 3 additions and 4 deletions

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kernel/irq_work.c

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