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sched/fair: Use mul_u32_u32()

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While reading the code I encountered another site where we should be
using mul_u32_u32() because GCC just won't take a hint.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: bsegall@google.com
Cc: dietmar.eggemann@arm.com
Cc: juri.lelli@redhat.com
Cc: ktkhai@virtuozzo.com
Cc: mgorman@suse.de
Cc: qais.yousef@arm.com
Cc: qperret@google.com
Cc: rostedt@goodmis.org
Cc: valentin.schneider@arm.com
Cc: vincent.guittot@linaro.org
Link: https://lkml.kernel.org/r/20191108131909.717931380@infradead.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Peter Zijlstra 2019-11-08 14:15:59 +01:00 committed by Ingo Molnar
parent 98c2f700ed
commit 2eeb01a28c
1 changed files with 1 additions and 2 deletions
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3
kernel/sched/fair.c
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@ -229,8 +229,7 @@ static u64 __calc_delta(u64 delta_exec, unsigned long weight, struct load_weight
}
}
/* hint to use a 32x32->64 mul */
fact = (u64)(u32)fact * lw->inv_weight;
fact = mul_u32_u32(fact, lw->inv_weight);
while (fact >> 32) {
fact >>= 1;