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| author | Anna-Maria Gleixner <anna-maria@linutronix.de> | 2017-12-21 11:41:39 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2018-01-16 02:35:46 +0100 |
| commit | c272ca58c3ec5631f4ab507489d9477f74efe645 (patch) | |
| tree | e117843b4055a931b4973dbf270f3a16b07b6f32 /include/linux/hrtimer.h | |
| parent | 63e2ed3659752a4850e0ef3a07f809988fcd74a4 (diff) | |
| download | lwn-c272ca58c3ec5631f4ab507489d9477f74efe645.tar.gz lwn-c272ca58c3ec5631f4ab507489d9477f74efe645.zip | |
hrtimer: Switch 'for' loop to _ffs() evaluation
Looping over all clock bases to find active bits is suboptimal if not all
bases are active.
Avoid this by converting it to a __ffs() evaluation. The functionallity is
outsourced into its own function and is called via a macro as suggested by
Peter Zijlstra.
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: keescook@chromium.org
Link: http://lkml.kernel.org/r/20171221104205.7269-11-anna-maria@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/hrtimer.h')
0 files changed, 0 insertions, 0 deletions