6.14-stable review patch. If anyone has any objections, please let me know.
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From: Yeoreum Yun yeoreum.yun@arm.com
[ Upstream commit 4cf364ca57d851e192ce02e98d314d22fa514895 ]
coresight_trace_id_map->lock can be acquired while coresight devices' drvdata_lock.
But the drvdata_lock can be raw_spinlock_t (i.e) coresight-etm4x.
To address this, change type of coresight_trace_id_map->lock to raw_spinlock_t
Signed-off-by: Yeoreum Yun yeoreum.yun@arm.com Reviewed-by: James Clark james.clark@linaro.org Reviewed-by: Mike Leach mike.leach@linaro.org Signed-off-by: Suzuki K Poulose suzuki.poulose@arm.com Link: https://lore.kernel.org/r/20250306121110.1647948-4-yeoreum.yun@arm.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/hwtracing/coresight/coresight-core.c | 2 +- .../hwtracing/coresight/coresight-trace-id.c | 22 +++++++++---------- include/linux/coresight.h | 2 +- 3 files changed, 13 insertions(+), 13 deletions(-)
diff --git a/drivers/hwtracing/coresight/coresight-core.c b/drivers/hwtracing/coresight/coresight-core.c index 4936dc2f7a56b..4fe837b02e314 100644 --- a/drivers/hwtracing/coresight/coresight-core.c +++ b/drivers/hwtracing/coresight/coresight-core.c @@ -1249,7 +1249,7 @@ struct coresight_device *coresight_register(struct coresight_desc *desc)
if (csdev->type == CORESIGHT_DEV_TYPE_SINK || csdev->type == CORESIGHT_DEV_TYPE_LINKSINK) { - spin_lock_init(&csdev->perf_sink_id_map.lock); + raw_spin_lock_init(&csdev->perf_sink_id_map.lock); csdev->perf_sink_id_map.cpu_map = alloc_percpu(atomic_t); if (!csdev->perf_sink_id_map.cpu_map) { kfree(csdev); diff --git a/drivers/hwtracing/coresight/coresight-trace-id.c b/drivers/hwtracing/coresight/coresight-trace-id.c index 378af743be455..7ed337d54d3e3 100644 --- a/drivers/hwtracing/coresight/coresight-trace-id.c +++ b/drivers/hwtracing/coresight/coresight-trace-id.c @@ -22,7 +22,7 @@ enum trace_id_flags { static DEFINE_PER_CPU(atomic_t, id_map_default_cpu_ids) = ATOMIC_INIT(0); static struct coresight_trace_id_map id_map_default = { .cpu_map = &id_map_default_cpu_ids, - .lock = __SPIN_LOCK_UNLOCKED(id_map_default.lock) + .lock = __RAW_SPIN_LOCK_UNLOCKED(id_map_default.lock) };
/* #define TRACE_ID_DEBUG 1 */ @@ -131,11 +131,11 @@ static void coresight_trace_id_release_all(struct coresight_trace_id_map *id_map unsigned long flags; int cpu;
- spin_lock_irqsave(&id_map->lock, flags); + raw_spin_lock_irqsave(&id_map->lock, flags); bitmap_zero(id_map->used_ids, CORESIGHT_TRACE_IDS_MAX); for_each_possible_cpu(cpu) atomic_set(per_cpu_ptr(id_map->cpu_map, cpu), 0); - spin_unlock_irqrestore(&id_map->lock, flags); + raw_spin_unlock_irqrestore(&id_map->lock, flags); DUMP_ID_MAP(id_map); }
@@ -144,7 +144,7 @@ static int _coresight_trace_id_get_cpu_id(int cpu, struct coresight_trace_id_map unsigned long flags; int id;
- spin_lock_irqsave(&id_map->lock, flags); + raw_spin_lock_irqsave(&id_map->lock, flags);
/* check for existing allocation for this CPU */ id = _coresight_trace_id_read_cpu_id(cpu, id_map); @@ -171,7 +171,7 @@ static int _coresight_trace_id_get_cpu_id(int cpu, struct coresight_trace_id_map atomic_set(per_cpu_ptr(id_map->cpu_map, cpu), id);
get_cpu_id_out_unlock: - spin_unlock_irqrestore(&id_map->lock, flags); + raw_spin_unlock_irqrestore(&id_map->lock, flags);
DUMP_ID_CPU(cpu, id); DUMP_ID_MAP(id_map); @@ -188,12 +188,12 @@ static void _coresight_trace_id_put_cpu_id(int cpu, struct coresight_trace_id_ma if (!id) return;
- spin_lock_irqsave(&id_map->lock, flags); + raw_spin_lock_irqsave(&id_map->lock, flags);
coresight_trace_id_free(id, id_map); atomic_set(per_cpu_ptr(id_map->cpu_map, cpu), 0);
- spin_unlock_irqrestore(&id_map->lock, flags); + raw_spin_unlock_irqrestore(&id_map->lock, flags); DUMP_ID_CPU(cpu, id); DUMP_ID_MAP(id_map); } @@ -204,9 +204,9 @@ static int coresight_trace_id_map_get_system_id(struct coresight_trace_id_map *i unsigned long flags; int id;
- spin_lock_irqsave(&id_map->lock, flags); + raw_spin_lock_irqsave(&id_map->lock, flags); id = coresight_trace_id_alloc_new_id(id_map, preferred_id, traceid_flags); - spin_unlock_irqrestore(&id_map->lock, flags); + raw_spin_unlock_irqrestore(&id_map->lock, flags);
DUMP_ID(id); DUMP_ID_MAP(id_map); @@ -217,9 +217,9 @@ static void coresight_trace_id_map_put_system_id(struct coresight_trace_id_map * { unsigned long flags;
- spin_lock_irqsave(&id_map->lock, flags); + raw_spin_lock_irqsave(&id_map->lock, flags); coresight_trace_id_free(id, id_map); - spin_unlock_irqrestore(&id_map->lock, flags); + raw_spin_unlock_irqrestore(&id_map->lock, flags);
DUMP_ID(id); DUMP_ID_MAP(id_map); diff --git a/include/linux/coresight.h b/include/linux/coresight.h index 6ddcbb8be5165..d5ca0292550b2 100644 --- a/include/linux/coresight.h +++ b/include/linux/coresight.h @@ -238,7 +238,7 @@ struct coresight_trace_id_map { DECLARE_BITMAP(used_ids, CORESIGHT_TRACE_IDS_MAX); atomic_t __percpu *cpu_map; atomic_t perf_cs_etm_session_active; - spinlock_t lock; + raw_spinlock_t lock; };
/**