[PATCH] Configurable NODES_SHIFT

[cascardo/linux.git] / include / asm-arm / atomic.h

diff --git a/include/asm-arm/atomic.h b/include/asm-arm/atomic.h
index 75b8027..3d7283d 100644 (file)
--- a/include/asm-arm/atomic.h
+++ b/include/asm-arm/atomic.h
@@ -12,6 +12,7 @@
 #define __ASM_ARM_ATOMIC_H
 
 #include <linux/config.h>
+#include <linux/compiler.h>
 
 typedef struct { volatile int counter; } atomic_t;
 
@@ -82,11 +83,12 @@ static inline int atomic_sub_return(int i, atomic_t *v)
 
 static inline int atomic_cmpxchg(atomic_t *ptr, int old, int new)
 {
-       u32 oldval, res;
+       unsigned long oldval, res;
 
        do {
                __asm__ __volatile__("@ atomic_cmpxchg\n"
                "ldrex  %1, [%2]\n"
+               "mov    %0, #0\n"
                "teq    %1, %3\n"
                "strexeq %0, %4, [%2]\n"
                    : "=&r" (res), "=&r" (oldval)
@@ -173,6 +175,8 @@ static inline void atomic_clear_mask(unsigned long mask, unsigned long *addr)
 
 #endif /* __LINUX_ARM_ARCH__ */
 
+#define atomic_xchg(v, new) (xchg(&((v)->counter), new))
+
 static inline int atomic_add_unless(atomic_t *v, int a, int u)
 {
        int c, old;
@@ -203,5 +207,6 @@ static inline int atomic_add_unless(atomic_t *v, int a, int u)
 #define smp_mb__before_atomic_inc()    barrier()
 #define smp_mb__after_atomic_inc()     barrier()
 
+#include <asm-generic/atomic.h>
 #endif
 #endif