Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/parisc-2.6

[pandora-kernel.git] / include / linux / atomic.h

diff --git a/include/linux/atomic.h b/include/linux/atomic.h
index bc6615d..42b77b5 100644 (file)
--- a/include/linux/atomic.h
+++ b/include/linux/atomic.h
@@ -1,7 +1,31 @@
+/* Atomic operations usable in machine independent code */
 #ifndef _LINUX_ATOMIC_H
 #define _LINUX_ATOMIC_H
 #include <asm/atomic.h>
 
+/**
+ * atomic_add_unless - add unless the number is already a given value
+ * @v: pointer of type atomic_t
+ * @a: the amount to add to v...
+ * @u: ...unless v is equal to u.
+ *
+ * Atomically adds @a to @v, so long as @v was not already @u.
+ * Returns non-zero if @v was not @u, and zero otherwise.
+ */
+static inline int atomic_add_unless(atomic_t *v, int a, int u)
+{
+       return __atomic_add_unless(v, a, u) != u;
+}
+
+/**
+ * atomic_inc_not_zero - increment unless the number is zero
+ * @v: pointer of type atomic_t
+ *
+ * Atomically increments @v by 1, so long as @v is non-zero.
+ * Returns non-zero if @v was non-zero, and zero otherwise.
+ */
+#define atomic_inc_not_zero(v)         atomic_add_unless((v), 1, 0)
+
 /**
  * atomic_inc_not_zero_hint - increment if not null
  * @v: pointer of type atomic_t
@@ -73,4 +97,8 @@ static inline void atomic_or(int i, atomic_t *v)
 }
 #endif /* #ifndef CONFIG_ARCH_HAS_ATOMIC_OR */
 
+#include <asm-generic/atomic-long.h>
+#ifdef CONFIG_GENERIC_ATOMIC64
+#include <asm-generic/atomic64.h>
+#endif
 #endif /* _LINUX_ATOMIC_H */