diff mbox series

[V3] drivers: perf: arm_pmuv3: Drop some unused arguments from armv8_pmu_init()

Message ID 20231016025436.1368945-1-anshuman.khandual@arm.com (mailing list archive)
State New, archived
Headers show
Series [V3] drivers: perf: arm_pmuv3: Drop some unused arguments from armv8_pmu_init() | expand

Commit Message

Anshuman Khandual Oct. 16, 2023, 2:54 a.m. UTC 
All the PMU init functions want the default sysfs attribute groups, and so
these all call armv8_pmu_init_nogroups() helper, with none of them calling
armv8_pmu_init() directly. When we introduced armv8_pmu_init_nogroups() in
the commit e424b1798526 ("arm64: perf: Refactor PMU init callbacks")

 ... we thought that we might need custom attribute groups in future, but
as we evidently haven't, we can remove the option.

This patch folds armv8_pmu_init_nogroups() into armv8_pmu_init(), removing
the ability to use custom attribute groups and simplifying the code.

CC: James Clark <james.clark@arm.com>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
This applies on v6.6-rc6

Changes in V3:

- Updated the commit message as per Mark

Changes in V2:

https://lore.kernel.org/all/20231013040307.1296109-1-anshuman.khandual@arm.com/

- Dropped the helper armv8_pmu_init_nogroups()
- Updated the commit message

Changes in V1:

https://lore.kernel.org/all/20231009035638.165270-1-anshuman.khandual@arm.com/

 drivers/perf/arm_pmuv3.c | 44 +++++++++++-----------------------------
 1 file changed, 12 insertions(+), 32 deletions(-)

Comments

Will Deacon Oct. 19, 2023, 3:45 p.m. UTC | #1 
On Mon, 16 Oct 2023 08:24:36 +0530, Anshuman Khandual wrote:
> All the PMU init functions want the default sysfs attribute groups, and so
> these all call armv8_pmu_init_nogroups() helper, with none of them calling
> armv8_pmu_init() directly. When we introduced armv8_pmu_init_nogroups() in
> the commit e424b1798526 ("arm64: perf: Refactor PMU init callbacks")
> 
>  ... we thought that we might need custom attribute groups in future, but
> as we evidently haven't, we can remove the option.
> 
> [...]

Applied to will (for-next/perf), thanks!

[1/1] drivers: perf: arm_pmuv3: Drop some unused arguments from armv8_pmu_init()
      https://git.kernel.org/will/c/3b9a22d345ff

Cheers,
diff mbox series

Patch

diff --git a/drivers/perf/arm_pmuv3.c b/drivers/perf/arm_pmuv3.c
index 8fcaa26f0f8a..c093b6e823f6 100644
--- a/drivers/perf/arm_pmuv3.c
+++ b/drivers/perf/arm_pmuv3.c
@@ -1187,10 +1187,7 @@  static void armv8_pmu_register_sysctl_table(void)
 }
 
 static int armv8_pmu_init(struct arm_pmu *cpu_pmu, char *name,
-			  int (*map_event)(struct perf_event *event),
-			  const struct attribute_group *events,
-			  const struct attribute_group *format,
-			  const struct attribute_group *caps)
+			  int (*map_event)(struct perf_event *event))
 {
 	int ret = armv8pmu_probe_pmu(cpu_pmu);
 	if (ret)
@@ -1212,27 +1209,17 @@  static int armv8_pmu_init(struct arm_pmu *cpu_pmu, char *name,
 
 	cpu_pmu->name			= name;
 	cpu_pmu->map_event		= map_event;
-	cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_EVENTS] = events ?
-			events : &armv8_pmuv3_events_attr_group;
-	cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_FORMATS] = format ?
-			format : &armv8_pmuv3_format_attr_group;
-	cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_CAPS] = caps ?
-			caps : &armv8_pmuv3_caps_attr_group;
-
+	cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_EVENTS] = &armv8_pmuv3_events_attr_group;
+	cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_FORMATS] = &armv8_pmuv3_format_attr_group;
+	cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_CAPS] = &armv8_pmuv3_caps_attr_group;
 	armv8_pmu_register_sysctl_table();
 	return 0;
 }
 
-static int armv8_pmu_init_nogroups(struct arm_pmu *cpu_pmu, char *name,
-				   int (*map_event)(struct perf_event *event))
-{
-	return armv8_pmu_init(cpu_pmu, name, map_event, NULL, NULL, NULL);
-}
-
 #define PMUV3_INIT_SIMPLE(name)						\
 static int name##_pmu_init(struct arm_pmu *cpu_pmu)			\
 {									\
-	return armv8_pmu_init_nogroups(cpu_pmu, #name, armv8_pmuv3_map_event);\
+	return armv8_pmu_init(cpu_pmu, #name, armv8_pmuv3_map_event);	\
 }
 
 PMUV3_INIT_SIMPLE(armv8_pmuv3)
@@ -1263,44 +1250,37 @@  PMUV3_INIT_SIMPLE(armv8_nvidia_denver)
 
 static int armv8_a35_pmu_init(struct arm_pmu *cpu_pmu)
 {
-	return armv8_pmu_init_nogroups(cpu_pmu, "armv8_cortex_a35",
-				       armv8_a53_map_event);
+	return armv8_pmu_init(cpu_pmu, "armv8_cortex_a35", armv8_a53_map_event);
 }
 
 static int armv8_a53_pmu_init(struct arm_pmu *cpu_pmu)
 {
-	return armv8_pmu_init_nogroups(cpu_pmu, "armv8_cortex_a53",
-				       armv8_a53_map_event);
+	return armv8_pmu_init(cpu_pmu, "armv8_cortex_a53", armv8_a53_map_event);
 }
 
 static int armv8_a57_pmu_init(struct arm_pmu *cpu_pmu)
 {
-	return armv8_pmu_init_nogroups(cpu_pmu, "armv8_cortex_a57",
-				       armv8_a57_map_event);
+	return armv8_pmu_init(cpu_pmu, "armv8_cortex_a57", armv8_a57_map_event);
 }
 
 static int armv8_a72_pmu_init(struct arm_pmu *cpu_pmu)
 {
-	return armv8_pmu_init_nogroups(cpu_pmu, "armv8_cortex_a72",
-				       armv8_a57_map_event);
+	return armv8_pmu_init(cpu_pmu, "armv8_cortex_a72", armv8_a57_map_event);
 }
 
 static int armv8_a73_pmu_init(struct arm_pmu *cpu_pmu)
 {
-	return armv8_pmu_init_nogroups(cpu_pmu, "armv8_cortex_a73",
-				       armv8_a73_map_event);
+	return armv8_pmu_init(cpu_pmu, "armv8_cortex_a73", armv8_a73_map_event);
 }
 
 static int armv8_thunder_pmu_init(struct arm_pmu *cpu_pmu)
 {
-	return armv8_pmu_init_nogroups(cpu_pmu, "armv8_cavium_thunder",
-				       armv8_thunder_map_event);
+	return armv8_pmu_init(cpu_pmu, "armv8_cavium_thunder", armv8_thunder_map_event);
 }
 
 static int armv8_vulcan_pmu_init(struct arm_pmu *cpu_pmu)
 {
-	return armv8_pmu_init_nogroups(cpu_pmu, "armv8_brcm_vulcan",
-				       armv8_vulcan_map_event);
+	return armv8_pmu_init(cpu_pmu, "armv8_brcm_vulcan", armv8_vulcan_map_event);
 }
 
 static const struct of_device_id armv8_pmu_of_device_ids[] = {