Commit-ID: 9fc4468d546b6eb55b0aa5b04b0c36238ebf57e7 Gitweb: http://git.kernel.org/tip/9fc4468d546b6eb55b0aa5b04b0c36238ebf57e7 Author: Rasmus Villemoes <li...@rasmusvillemoes.dk> AuthorDate: Fri, 2 Oct 2015 09:45:30 +0200 Committer: Thomas Gleixner <t...@linutronix.de> CommitDate: Sun, 11 Oct 2015 22:13:46 +0200
timers: Use __fls in apply_slack() In apply_slack(), find_last_bit() is applied to a bitmask consisting of precisely BITS_PER_LONG bits. Since mask is non-zero, we might as well eliminate the function call and use __fls() directly. On x86_64, this shaves 23 bytes of the only caller, mod_timer(). This also gets rid of Coverity CID 1192106, but that is a false positive: Coverity is not aware that mask != 0 implies that find_last_bit will not return BITS_PER_LONG. Signed-off-by: Rasmus Villemoes <li...@rasmusvillemoes.dk> Cc: John Stultz <john.stu...@linaro.org> Link: http://lkml.kernel.org/r/1443771931-6284-1-git-send-email-li...@rasmusvillemoes.dk Signed-off-by: Thomas Gleixner <t...@linutronix.de> --- kernel/time/timer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/time/timer.c b/kernel/time/timer.c index d3f5e92..74591ba 100644 --- a/kernel/time/timer.c +++ b/kernel/time/timer.c @@ -874,7 +874,7 @@ unsigned long apply_slack(struct timer_list *timer, unsigned long expires) if (mask == 0) return expires; - bit = find_last_bit(&mask, BITS_PER_LONG); + bit = __fls(mask); mask = (1UL << bit) - 1; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
