tree 68a22ef0eee00723de6f05e9f8b0d68eeacd195f
parent 5acba71e18833b9d06686b3751598bfa263a3ac3
author Frederic Weisbecker <fweisbec@gmail.com> 1458830280 +0100
committer Ingo Molnar <mingo@kernel.org> 1459245131 +0200

timers/nohz: Convert tick dependency mask to atomic_t

The tick dependency mask was intially unsigned long because this is the
type on which clear_bit() operates on and fetch_or() accepts it.

But now that we have atomic_fetch_or(), we can instead use
atomic_andnot() to clear the bit. This consolidates the type of our
tick dependency mask, reduce its size on structures and benefit from
possible architecture optimizations on atomic_t operations.

Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1458830281-4255-3-git-send-email-fweisbec@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>