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perf/core, x86: Reduce number of CONFIG_X86_LOCAL_APIC macros

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The function reserve_pmc_hardware() and release_pmc_hardware()
were hard to read. This patch improves readability of the code by
removing most of the CONFIG_X86_LOCAL_APIC macros.

Signed-off-by: Robert Richter <robert.richter@amd.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1268826553-19518-2-git-send-email-robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Robert Richter 2010-03-17 12:49:10 +01:00 committed by Ingo Molnar
parent 3b0d516463
commit b27ea29c62
1 changed files with 9 additions and 6 deletions
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15
arch/x86/kernel/cpu/perf_event.c
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@ -313,9 +313,10 @@ x86_perf_event_update(struct perf_event *event)
static atomic_t active_events;
static DEFINE_MUTEX(pmc_reserve_mutex);
#ifdef CONFIG_X86_LOCAL_APIC
static bool reserve_pmc_hardware(void)
{
#ifdef CONFIG_X86_LOCAL_APIC
int i;
if (nmi_watchdog == NMI_LOCAL_APIC)
@ -330,11 +331,9 @@ static bool reserve_pmc_hardware(void)
if (!reserve_evntsel_nmi(x86_pmu.eventsel + i))
goto eventsel_fail;
}
#endif
return true;
#ifdef CONFIG_X86_LOCAL_APIC
eventsel_fail:
for (i--; i >= 0; i--)
release_evntsel_nmi(x86_pmu.eventsel + i);
@ -349,12 +348,10 @@ static bool reserve_pmc_hardware(void)
enable_lapic_nmi_watchdog();
return false;
#endif
}
static void release_pmc_hardware(void)
{
#ifdef CONFIG_X86_LOCAL_APIC
int i;
for (i = 0; i < x86_pmu.num_events; i++) {
@ -364,9 +361,15 @@ static void release_pmc_hardware(void)
if (nmi_watchdog == NMI_LOCAL_APIC)
enable_lapic_nmi_watchdog();
#endif
}
#else
static bool reserve_pmc_hardware(void) { return true; }
static void release_pmc_hardware(void) {}
#endif
static int reserve_ds_buffers(void);
static void release_ds_buffers(void);