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| author | Ingo Molnar <mingo@elte.hu> | 2008-11-08 17:05:38 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-11-08 17:05:38 +0100 |
| commit | 7cbaef9c83e58bbd4bdd534b09052b6c5ec457d5 (patch) | |
| tree | 7d2746038b50eb3b2721f506f82de9a0a910c2e6 /arch | |
| parent | 0d12cdd5f883f508d33b85c1bae98fa28987c8c7 (diff) | |
| download | linux-7cbaef9c83e58bbd4bdd534b09052b6c5ec457d5.tar.gz linux-7cbaef9c83e58bbd4bdd534b09052b6c5ec457d5.tar.bz2 linux-7cbaef9c83e58bbd4bdd534b09052b6c5ec457d5.zip | |
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.c | 2 |
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) 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 |