Messages in this thread Patch in this message | | | From | Anshuman Khandual <> | Subject | [PATCH V2] drivers: perf: arm_pmuv3: Drop some unused arguments from armv8_pmu_init() | Date | Fri, 13 Oct 2023 09:33:07 +0530 |
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There is just a single call site remaining for armv8_pmu_init(), passing on NULL pointers for all custom 'struct attribute_group's. These arguments are not really getting used, and hence can be dropped. Afterwards the function armv8_pmu_init_nogroups() itself becomes redundant, and can also be dropped as well.
The commit e424b1798526 ("arm64: perf: Refactor PMU init callbacks") wanted to preserve the notion that non-default sysfs attributes could be used some time in the future and hence armv8_pmu_init_nogroups() stayed on but now it can be dropped to remove some redundant indirection, 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 Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> --- This applies on v6.6-rc5
Changes in V2:
- 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(-)
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[] = { -- 2.25.1
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