[PATCH] alpha: Fix HW performance counters to be stopped properly.

Michael Cree
2010-09-12T05:37:58Z

Also fix a few compile errors due to undefined and duplicated
variables.

Signed-off-by: Michael Cree <mcree@orcon.net.nz>
---
arch/alpha/kernel/perf_event.c | 17 +++++++++--------
1 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/arch/alpha/kernel/perf_event.c b/arch/alpha/kernel/perf_event.c
index a25fe9e..41f204f 100644
--- a/arch/alpha/kernel/perf_event.c
+++ b/arch/alpha/kernel/perf_event.c
@@ -422,9 +422,10 @@ static void maybe_change_configuration(struct cpu_hw_events *cpuc)
static int alpha_pmu_add(struct perf_event *event, int flags)
{
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+ struct hw_perf_event *hwc = &event->hw;
int n0;
int ret;
- unsigned long flags;
+ unsigned long irq_flags;

/*
* The Sparc code has the IRQ disable first followed by the perf
@@ -435,7 +436,7 @@ static int alpha_pmu_add(struct perf_event *event, int flags)
* final PMI to occur before we disable interrupts.
*/
perf_pmu_disable(event->pmu);
- local_irq_save(flags);
+ local_irq_save(irq_flags);

/* Default to error to be returned */
ret = -EAGAIN;
@@ -458,7 +459,7 @@ static int alpha_pmu_add(struct perf_event *event, int flags)
if (!(flags & PERF_EF_START))
hwc->state |= PERF_HES_STOPPED;

- local_irq_restore(flags);
+ local_irq_restore(irq_flags);
perf_pmu_enable(event->pmu);

return ret;
@@ -474,11 +475,11 @@ static void alpha_pmu_del(struct perf_event *event, int flags)
{
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
struct hw_perf_event *hwc = &event->hw;
- unsigned long flags;
+ unsigned long irq_flags;
int j;

perf_pmu_disable(event->pmu);
- local_irq_save(flags);
+ local_irq_save(irq_flags);

for (j = 0; j < cpuc->n_events; j++) {
if (event == cpuc->event[j]) {
@@ -504,7 +505,7 @@ static void alpha_pmu_del(struct perf_event *event, int flags)
}
}

- local_irq_restore(flags);
+ local_irq_restore(irq_flags);
perf_pmu_enable(event->pmu);
}

@@ -523,7 +524,7 @@ static void alpha_pmu_stop(struct perf_event *event, int flags)
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);

if (!(hwc->state & PERF_HES_STOPPED)) {
- cpuc->idx_mask &= !(1UL<<hwc->idx);
+ cpuc->idx_mask &= ~(1UL<<hwc->idx);
hwc->state |= PERF_HES_STOPPED;
}

@@ -533,7 +534,7 @@ static void alpha_pmu_stop(struct perf_event *event, int flags)
}

if (cpuc->enabled)
- wrperfmon(PERFMON_CMD_ENABLE, (1UL<<hwc->idx));
+ wrperfmon(PERFMON_CMD_DISABLE, (1UL<<hwc->idx));
}

--
1.7.1