[PATCH v3 3/9] coresight: change coresight_trace_id_map's lock type to raw_spinlock_t
From: Yeoreum Yun <hidden>
Date: 2024-12-16 11:50:18
Also in:
linux-rt-devel, lkml
Subsystem:
arm/coresight framework and drivers, hardware tracing facilities, the rest · Maintainers:
Suzuki K Poulose, Alexander Shishkin, Linus Torvalds
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 <redacted> --- 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 ea38ecf26fcb..cc2d87b2f248 100644
--- a/drivers/hwtracing/coresight/coresight-core.c
+++ b/drivers/hwtracing/coresight/coresight-core.c@@ -1164,7 +1164,7 @@ 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 d98e12cb30ec..a6531869e9ec 100644
--- a/drivers/hwtracing/coresight/coresight-trace-id.c
+++ b/drivers/hwtracing/coresight/coresight-trace-id.c@@ -16,7 +16,7 @@ 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 */
@@ -121,11 +121,11 @@ 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); }
@@ -134,7 +134,7 @@ 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);
@@ -161,7 +161,7 @@ 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);
@@ -178,12 +178,12 @@ 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); }
@@ -193,10 +193,10 @@ 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); /* prefer odd IDs for system components to avoid legacy CPU IDS */ id = coresight_trace_id_alloc_new_id(id_map, 0, true); - spin_unlock_irqrestore(&id_map->lock, flags); + raw_spin_unlock_irqrestore(&id_map->lock, flags); DUMP_ID(id); DUMP_ID_MAP(id_map);
@@ -207,9 +207,9 @@ 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 924b58c343b3..6446ca1f09d8 100644
--- a/include/linux/coresight.h
+++ b/include/linux/coresight.h@@ -233,7 +233,7 @@ 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; }; /**
--
LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7}