Merge branch 'for_paulus' of master.kernel.org:/pub/scm/linux/kernel/git/galak/powerp...

[linux-2.6] / include / asm-arm26 / atomic.h

diff --git a/include/asm-arm26/atomic.h b/include/asm-arm26/atomic.h
index 54b24ead7132520692d54ea45eec9329780b3e12..97e944fe1cff4c9bf4d9c0eb7603fca6e43bf916 100644 (file)
--- a/include/asm-arm26/atomic.h
+++ b/include/asm-arm26/atomic.h
@@ -20,7 +20,6 @@
 #ifndef __ASM_ARM_ATOMIC_H
 #define __ASM_ARM_ATOMIC_H
 
-#include <linux/config.h>
 
 #ifdef CONFIG_SMP
 #error SMP is NOT supported
@@ -76,6 +75,23 @@ static inline int atomic_cmpxchg(atomic_t *v, int old, int new)
        return ret;
 }
 
+#define atomic_xchg(v, new) (xchg(&((v)->counter), new))
+
+static inline int atomic_add_unless(atomic_t *v, int a, int u)
+{
+       int ret;
+       unsigned long flags;
+
+       local_irq_save(flags);
+       ret = v->counter;
+       if (ret != u)
+               v->counter += a;
+       local_irq_restore(flags);
+
+       return ret != u;
+}
+#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
+
 static inline void atomic_clear_mask(unsigned long mask, unsigned long *addr)
 {
         unsigned long flags;
@@ -103,5 +119,6 @@ static inline void atomic_clear_mask(unsigned long mask, unsigned long *addr)
 #define smp_mb__before_atomic_inc()    barrier()
 #define smp_mb__after_atomic_inc()     barrier()
 
+#include <asm-generic/atomic.h>
 #endif
 #endif