[RFC][PATCH 01/11] perf, x86: Remove superfluous arguments to x86_perf_event_set_period()

Peter Zijlstra
2010-03-03T16:45:31Z

[-- Attachment #1: perf-x86-cleanup-args.patch --]
[-- Type: text/plain, Size: 2698 bytes --]

The second and third argument to x86_perf_event_set_period() are
superfluous since they are simple expressions of the first argument.
Hence remove them.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
---
arch/x86/kernel/cpu/perf_event.c | 15 +++++++--------
arch/x86/kernel/cpu/perf_event_intel.c | 2 +-
2 files changed, 8 insertions(+), 9 deletions(-)

Index: linux-2.6/arch/x86/kernel/cpu/perf_event.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/cpu/perf_event.c
+++ linux-2.6/arch/x86/kernel/cpu/perf_event.c
@@ -165,8 +165,7 @@ static DEFINE_PER_CPU(struct cpu_hw_even
.enabled = 1,
};

-static int x86_perf_event_set_period(struct perf_event *event,
- struct hw_perf_event *hwc, int idx);
+static int x86_perf_event_set_period(struct perf_event *event);

/*
* Generalized hw caching related hw_event table, filled
@@ -830,7 +829,7 @@ void hw_perf_enable(void)

if (hwc->idx == -1) {
x86_assign_hw_event(event, cpuc, i);
- x86_perf_event_set_period(event, hwc, hwc->idx);
+ x86_perf_event_set_period(event);
}
/*
* need to mark as active because x86_pmu_disable()
@@ -871,12 +870,12 @@ static DEFINE_PER_CPU(u64 [X86_PMC_IDX_M
* To be called with the event disabled in hw:
*/
static int
-x86_perf_event_set_period(struct perf_event *event,
- struct hw_perf_event *hwc, int idx)
+x86_perf_event_set_period(struct perf_event *event)
{
+ struct hw_perf_event *hwc = &event->hw;
s64 left = atomic64_read(&hwc->period_left);
s64 period = hwc->sample_period;
- int err, ret = 0;
+ int err, ret = 0, idx = hwc->idx;

if (idx == X86_PMC_IDX_FIXED_BTS)
return 0;
@@ -974,7 +973,7 @@ static int x86_pmu_start(struct perf_eve
if (hwc->idx == -1)
return -EAGAIN;

- x86_perf_event_set_period(event, hwc, hwc->idx);
+ x86_perf_event_set_period(event);
x86_pmu.enable(hwc, hwc->idx);

return 0;
@@ -1119,7 +1118,7 @@ static int x86_pmu_handle_irq(struct pt_
handled = 1;
data.period = event->hw.last_period;

- if (!x86_perf_event_set_period(event, hwc, idx))
+ if (!x86_perf_event_set_period(event))
continue;

if (perf_event_overflow(event, 1, &data, regs))
Index: linux-2.6/arch/x86/kernel/cpu/perf_event_intel.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/cpu/perf_event_intel.c
+++ linux-2.6/arch/x86/kernel/cpu/perf_event_intel.c
@@ -700,7 +700,7 @@ static int intel_pmu_save_and_restart(st
int ret;

x86_perf_event_update(event, hwc, idx);
- ret = x86_perf_event_set_period(event, hwc, idx);
+ ret = x86_perf_event_set_period(event);

return ret;
}

--