Commit 2c2e21e7 authored by Qi Liu's avatar Qi Liu Committed by Will Deacon
Browse files

arm64: perf: Remove redundant initialization in perf_event.c 



The initialization of value in function armv8pmu_read_hw_counter()
and armv8pmu_read_counter() seem redundant, as they are soon updated.
So, We can remove them.

Signed-off-by: default avatarQi Liu <liuqi115@huawei.com>
Link: https://lore.kernel.org/r/1617275801-1980-1-git-send-email-liuqi115@huawei.com


Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent e20ac6c5

arch/arm64/kernel/perf_event.c

+2 −3
Original line number Diff line number Diff line
@@ -470,9 +470,8 @@ static inline u64 armv8pmu_read_evcntr(int idx) 
static inline u64 armv8pmu_read_hw_counter(struct perf_event *event)

{

	int idx = event->hw.idx;

	u64 val = 0;

	u64 val = armv8pmu_read_evcntr(idx);



	val = armv8pmu_read_evcntr(idx);

	if (armv8pmu_event_is_chained(event))

		val = (val << 32) | armv8pmu_read_evcntr(idx - 1);

	return val;
@@ -520,7 +519,7 @@ static u64 armv8pmu_read_counter(struct perf_event *event) 
{

	struct hw_perf_event *hwc = &event->hw;

	int idx = hwc->idx;

	u64 value = 0;

	u64 value;



	if (idx == ARMV8_IDX_CYCLE_COUNTER)

		value = read_sysreg(pmccntr_el0);