The following commit has been merged into the perf/core branch of tip:
Commit-ID: 5a09928d339f3cf0973991ddc3a2798825c84c99
Gitweb: https://git.kernel.org/tip/5a09928d339f3cf0973991ddc3a2798825c84c99
Author: Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
AuthorDate: Fri, 03 Jul 2020 05:49:24 -07:00
Committer: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CommitterDate: Wed, 08 Jul 2020 11:38:55 +02:00
perf/x86: Remove task_ctx_size
A new kmem_cache method has replaced the kzalloc() to allocate the PMU
specific data. The task_ctx_size is not required anymore.
Signed-off-by: Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Link: https://lkml.kernel.org/r/1593780569-62993-19-git-send-email-kan.liang@xxxxxxxxxxxxxxx
---
arch/x86/events/core.c | 1 -
arch/x86/events/intel/lbr.c | 1 -
include/linux/perf_event.h | 4 ----
kernel/events/core.c | 4 +---
4 files changed, 1 insertion(+), 9 deletions(-)
diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c
index d740c86..6b1228a 100644
--- a/arch/x86/events/core.c
+++ b/arch/x86/events/core.c
@@ -2371,7 +2371,6 @@ static struct pmu pmu = {
.event_idx = x86_pmu_event_idx,
.sched_task = x86_pmu_sched_task,
- .task_ctx_size = sizeof(struct x86_perf_task_context),
.swap_task_ctx = x86_pmu_swap_task_ctx,
.check_period = x86_pmu_check_period,
diff --git a/arch/x86/events/intel/lbr.c b/arch/x86/events/intel/lbr.c
index e784c1d..3ad5289 100644
--- a/arch/x86/events/intel/lbr.c
+++ b/arch/x86/events/intel/lbr.c
@@ -1672,7 +1672,6 @@ void __init intel_pmu_arch_lbr_init(void)
size = sizeof(struct x86_perf_task_context_arch_lbr) +
lbr_nr * sizeof(struct lbr_entry);
- x86_get_pmu()->task_ctx_size = size;
x86_get_pmu()->task_ctx_cache = create_lbr_kmem_cache(size, 0);
x86_pmu.lbr_from = MSR_ARCH_LBR_FROM_0;
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 09915ae..3b22db0 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -419,10 +419,6 @@ struct pmu {
*/
void (*sched_task) (struct perf_event_context *ctx,
bool sched_in);
- /*
- * PMU specific data size
- */
- size_t task_ctx_size;
/*
* Kmem cache of PMU specific data
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 30d9b31..7c436d7 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -1243,15 +1243,13 @@ static void *alloc_task_ctx_data(struct pmu *pmu)
if (pmu->task_ctx_cache)
return kmem_cache_zalloc(pmu->task_ctx_cache, GFP_KERNEL);
- return kzalloc(pmu->task_ctx_size, GFP_KERNEL);
+ return NULL;
}
static void free_task_ctx_data(struct pmu *pmu, void *task_ctx_data)
{
if (pmu->task_ctx_cache && task_ctx_data)
kmem_cache_free(pmu->task_ctx_cache, task_ctx_data);
- else
- kfree(task_ctx_data);
}
static void free_ctx(struct rcu_head *head)
|