Merge branch 'for-linus' of git://oss.sgi.com:8090/xfs/xfs-2.6

[linux-2.6-omap-h63xx.git] / include / linux / spinlock.h

diff --git a/include/linux/spinlock.h b/include/linux/spinlock.h
index a946176db638c7198705a20a7d2fd715279dfc2d..124449733c55a64595198aa8dc8eaf6a682189ca 100644 (file)
--- a/include/linux/spinlock.h
+++ b/include/linux/spinlock.h
@@ -120,6 +120,12 @@ do {                                                               \
 
 #define spin_is_locked(lock)   __raw_spin_is_locked(&(lock)->raw_lock)
 
+#ifdef CONFIG_GENERIC_LOCKBREAK
+#define spin_is_contended(lock) ((lock)->break_lock)
+#else
+#define spin_is_contended(lock)        __raw_spin_is_contended(&(lock)->raw_lock)
+#endif
+
 /**
  * spin_unlock_wait - wait until the spinlock gets unlocked
  * @lock: the spinlock in question.
@@ -282,6 +288,13 @@ do {                                               \
        1 : ({ local_irq_restore(flags); 0; }); \
 })
 
+#define write_trylock_irqsave(lock, flags) \
+({ \
+       local_irq_save(flags); \
+       write_trylock(lock) ? \
+       1 : ({ local_irq_restore(flags); 0; }); \
+})
+
 /*
  * Locks two spinlocks l1 and l2.
  * l1_first indicates if spinlock l1 should be taken first.