diff options
Diffstat (limited to 'kernel/locking/qspinlock.c')
| -rw-r--r-- | kernel/locking/qspinlock.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/kernel/locking/qspinlock.c b/kernel/locking/qspinlock.c index cbff6ba53d56..2b23378775fe 100644 --- a/kernel/locking/qspinlock.c +++ b/kernel/locking/qspinlock.c @@ -22,6 +22,7 @@ #include <linux/prefetch.h> #include <asm/byteorder.h> #include <asm/qspinlock.h> +#include <trace/events/lock.h> /* * Include queued spinlock statistics code @@ -312,7 +313,7 @@ static __always_inline u32 __pv_wait_head_or_lock(struct qspinlock *lock, * contended : (*,x,y) +--> (*,0,0) ---> (*,0,1) -' : * queue : ^--' : */ -void queued_spin_lock_slowpath(struct qspinlock *lock, u32 val) +void __lockfunc queued_spin_lock_slowpath(struct qspinlock *lock, u32 val) { struct mcs_spinlock *prev, *next, *node; u32 old, tail; @@ -401,6 +402,8 @@ pv_queue: idx = node->count++; tail = encode_tail(smp_processor_id(), idx); + trace_contention_begin(lock, LCB_F_SPIN); + /* * 4 nodes are allocated based on the assumption that there will * not be nested NMIs taking spinlocks. That may not be true in @@ -554,6 +557,8 @@ locked: pv_kick_node(lock, next); release: + trace_contention_end(lock, 0); + /* * release the node */ |