Commit 2eeb01a2 authored Nov 08, 2019 by Peter Zijlstra Committed by Ingo Molnar Nov 11, 2019

sched/fair: Use mul_u32_u32()



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>

parent 98c2f700

kernel/sched/fair.c

+1 −2

Original line number	Original line	Diff line number	Diff line
	@@ -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 = mul_u32_u32(fact, lw->inv_weight);
	fact = (u64)(u32)fact * lw->inv_weight;

	while (fact >> 32) {		while (fact >> 32) {
	fact >>= 1;		fact >>= 1;

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