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perf: Reduce perf_disable() usage

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Since the current perf_disable() usage is only an optimization,
remove it for now. This eases the removal of the __weak
hw_perf_enable() interface.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: paulus <paulus@samba.org>
Cc: stephane eranian <eranian@googlemail.com>
Cc: Robert Richter <robert.richter@amd.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Lin Ming <ming.m.lin@intel.com>
Cc: Yanmin <yanmin_zhang@linux.intel.com>
Cc: Deng-Cheng Zhu <dengcheng.zhu@gmail.com>
Cc: David Miller <davem@davemloft.net>
Cc: Michael Cree <mcree@orcon.net.nz>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra
2010-06-11 17:32:03 +02:00
committed by Ingo Molnar
parent 9ed6060d28
commit 24cd7f54a0
8 changed files with 48 additions and 59 deletions
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3
arch/arm/kernel/perf_event.c
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@ -277,6 +277,8 @@ armpmu_enable(struct perf_event *event)
int idx;
int err = 0;
perf_disable();
/* If we don't have a space for the counter then finish early. */
idx = armpmu->get_event_idx(cpuc, hwc);
if (idx < 0) {
@ -303,6 +305,7 @@ armpmu_enable(struct perf_event *event)
perf_event_update_userpage(event);
out:
perf_enable();
return err;
}