diff options
Diffstat (limited to 'kernel/locking/mcs_spinlock.h')
| -rw-r--r-- | kernel/locking/mcs_spinlock.h | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/kernel/locking/mcs_spinlock.h b/kernel/locking/mcs_spinlock.h index 74356dc..4d60986 100644 --- a/kernel/locking/mcs_spinlock.h +++ b/kernel/locking/mcs_spinlock.h @@ -27,7 +27,7 @@ struct mcs_spinlock { #define arch_mcs_spin_lock_contended(l) \ do { \ while (!(smp_load_acquire(l))) \ - arch_mutex_cpu_relax(); \ + cpu_relax_lowlatency(); \ } while (0) #endif @@ -56,9 +56,6 @@ do { \ * If the lock has already been acquired, then this will proceed to spin * on this node->locked until the previous lock holder sets the node->locked * in mcs_spin_unlock(). - * - * We don't inline mcs_spin_lock() so that perf can correctly account for the - * time spent in this lock function. */ static inline void mcs_spin_lock(struct mcs_spinlock **lock, struct mcs_spinlock *node) @@ -104,7 +101,7 @@ void mcs_spin_unlock(struct mcs_spinlock **lock, struct mcs_spinlock *node) return; /* Wait until the next pointer is set */ while (!(next = ACCESS_ONCE(node->next))) - arch_mutex_cpu_relax(); + cpu_relax_lowlatency(); } /* Pass lock to next waiter. */ |
