Commit 7cbaef9c authored Nov 08, 2008 by Ingo Molnar

sched: optimize sched_clock() a bit



sched_clock() uses cycles_2_ns() needlessly - which is an irq-disabling
variant of __cycles_2_ns().

Most of the time sched_clock() is called with irqs disabled already.
The few places that call it with irqs enabled need to be updated.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent 0d12cdd5

arch/x86/kernel/tsc.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -55,7 +55,7 @@ u64 native_sched_clock(void)
		rdtscll(this_offset);

		/* return the value in ns */
		return cycles_2_ns(this_offset);
		return __cycles_2_ns(this_offset);
		}

		/* We need to define a real function for sched_clock, to override the