dummy/linux-stable-mirror
1
0
Fork 1
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2025-04-19 20:58:31 +09:00
Code Issues Packages Projects Releases Wiki Activity

perf: arm_pmuv3: Don't disable counter in armv8pmu_enable_event()

Browse Source 
Currently armv8pmu_enable_event() starts by disabling the event counter
it has been asked to enable. This should not be necessary as the counter
(and the PMU as a whole) should not be active when
armv8pmu_enable_event() is called.

Remove the redundant call to armv8pmu_disable_event_counter(). At the
same time, remove the comment immeditately above as everything it says
is obvious from the function names below.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Tested-by: James Clark <james.clark@linaro.org>
Link: https://lore.kernel.org/r/20250218-arm-brbe-v19-v20-3-4e9922fc2e8e@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Mark Rutland 2025-02-18 14:39:58 -06:00 committed by Will Deacon
parent dcca27bc1e
commit 4b0567ad0b
1 changed files with 0 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/perf/arm_pmuv3.c
View File

@ -795,11 +795,6 @@ static void armv8pmu_enable_user_access(struct arm_pmu *cpu_pmu)
static void armv8pmu_enable_event(struct perf_event *event)
{
/*
* Enable counter and interrupt, and set the counter to count
* the event that we're interested in.
*/
armv8pmu_disable_event_counter(event);
armv8pmu_write_event_type(event);
armv8pmu_enable_event_irq(event);
armv8pmu_enable_event_counter(event);