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authorIngo Molnar <mingo@elte.hu>2008-11-08 11:05:38 -0500
committerIngo Molnar <mingo@elte.hu>2008-11-08 11:05:38 -0500
commit7cbaef9c83e58bbd4bdd534b09052b6c5ec457d5 (patch)
tree7d2746038b50eb3b2721f506f82de9a0a910c2e6 /arch
parent0d12cdd5f883f508d33b85c1bae98fa28987c8c7 (diff)
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>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/tsc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
index 2ef80e301925..424093b157d3 100644
--- a/arch/x86/kernel/tsc.c
+++ b/arch/x86/kernel/tsc.c
@@ -55,7 +55,7 @@ u64 native_sched_clock(void)
55 rdtscll(this_offset); 55 rdtscll(this_offset);
56 56
57 /* return the value in ns */ 57 /* return the value in ns */
58 return cycles_2_ns(this_offset); 58 return __cycles_2_ns(this_offset);
59} 59}
60 60
61/* We need to define a real function for sched_clock, to override the 61/* We need to define a real function for sched_clock, to override the