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s390/pai: Use PAI PMU index as parameter replacing event

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Use PAI PMU index value as function argument instead of pointer
to struct perf_event. Only that index value is used inside
functions pai_alloc_cpu() and pai_event_destroy_cpu().
No functional change.

Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Reviewed-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Thomas Richter 2026-09-01 14:33:18 +02:00 committed by Vasily Gorbik
parent df2908090c
commit 4eef4ab3aa
1 changed files with 12 additions and 13 deletions
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25
arch/s390/kernel/perf_pai.c
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@ -140,16 +140,14 @@ static void pai_free(struct pai_mapptr *mp)
/* Adjust usage counters and remove allocated memory when all users are
* gone.
*/
static void pai_event_destroy_cpu(struct perf_event *event, int cpu)
static void pai_event_destroy_cpu(int idx, int cpu)
{
int idx = PAI_PMU_IDX(event);
struct pai_mapptr *mp = per_cpu_ptr(pai_root[idx].mapptr, cpu);
struct pai_map *cpump = mp->mapptr;
mutex_lock(&pai_reserve_mutex);
debug_sprintf_event(paidbg, 5, "%s event %#llx idx %d cpu %d users %d "
"refcnt %u\n", __func__, event->attr.config, idx,
event->cpu, cpump->active_events,
debug_sprintf_event(paidbg, 5, "%s users %d refcnt %u\n",
__func__, cpump->active_events,
refcount_read(&cpump->refcnt));
if (refcount_dec_and_test(&cpump->refcnt))
pai_free(mp);
@ -159,17 +157,17 @@ static void pai_event_destroy_cpu(struct perf_event *event, int cpu)
static void pai_event_destroy(struct perf_event *event)
{
int cpu;
int cpu = 0, idx = PAI_PMU_IDX(event);
free_page(PAI_SAVE_AREA(event));
if (event->cpu == -1) {
struct cpumask *mask = PAI_CPU_MASK(event);
for_each_cpu(cpu, mask)
pai_event_destroy_cpu(event, cpu);
pai_event_destroy_cpu(idx, cpu);
kfree(mask);
} else {
pai_event_destroy_cpu(event, event->cpu);
pai_event_destroy_cpu(idx, event->cpu);
}
}
@ -241,12 +239,12 @@ static u64 paicrypt_getall(struct perf_event *event)
*
* Allocate the memory for the event.
*/
static int pai_alloc_cpu(struct perf_event *event, int cpu)
static int pai_alloc_cpu(int idx, int cpu)
{
int rc, idx = PAI_PMU_IDX(event);
struct pai_map *cpump = NULL;
bool need_paiext_cb = false;
struct pai_mapptr *mp;
int rc;
mutex_lock(&pai_reserve_mutex);
/* Allocate root node */
@ -318,6 +316,7 @@ static int pai_alloc_cpu(struct perf_event *event, int cpu)
static int pai_alloc(struct perf_event *event)
{
int idx = PAI_PMU_IDX(event);
struct cpumask *maskptr;
int cpu, rc = -ENOMEM;
@ -326,10 +325,10 @@ static int pai_alloc(struct perf_event *event)
goto out;
for_each_online_cpu(cpu) {
rc = pai_alloc_cpu(event, cpu);
rc = pai_alloc_cpu(idx, cpu);
if (rc) {
for_each_cpu(cpu, maskptr)
pai_event_destroy_cpu(event, cpu);
pai_event_destroy_cpu(idx, cpu);
kfree(maskptr);
goto out;
}
@ -392,7 +391,7 @@ static int pai_event_init(struct perf_event *event, int idx)
}
if (event->cpu >= 0)
rc = pai_alloc_cpu(event, event->cpu);
rc = pai_alloc_cpu(idx, event->cpu);
else
rc = pai_alloc(event);
if (rc) {