X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=include%2Fasm-x86_64%2Flocal.h;h=cd17945bf2181d1bd574b44818601e018ee806aa;hb=47b9c3b1e6afa3c40e3ac1822cd13946567b5955;hp=169c223a8452177b6c37c02be7356aabc299da7d;hpb=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2;p=linux-2.6

diff --git a/include/asm-x86_64/local.h b/include/asm-x86_64/local.h
index 169c223a84..cd17945bf2 100644
--- a/include/asm-x86_64/local.h
+++ b/include/asm-x86_64/local.h
@@ -5,7 +5,7 @@
 
 typedef struct
 {
-	volatile unsigned int counter;
+	volatile long counter;
 } local_t;
 
 #define LOCAL_INIT(i)	{ (i) }
@@ -13,39 +13,40 @@ typedef struct
 #define local_read(v)	((v)->counter)
 #define local_set(v,i)	(((v)->counter) = (i))
 
-static __inline__ void local_inc(local_t *v)
+static inline void local_inc(local_t *v)
 {
 	__asm__ __volatile__(
-		"incl %0"
+		"incq %0"
 		:"=m" (v->counter)
 		:"m" (v->counter));
 }
 
-static __inline__ void local_dec(local_t *v)
+static inline void local_dec(local_t *v)
 {
 	__asm__ __volatile__(
-		"decl %0"
+		"decq %0"
 		:"=m" (v->counter)
 		:"m" (v->counter));
 }
 
-static __inline__ void local_add(unsigned long i, local_t *v)
+static inline void local_add(long i, local_t *v)
 {
 	__asm__ __volatile__(
-		"addl %1,%0"
+		"addq %1,%0"
 		:"=m" (v->counter)
 		:"ir" (i), "m" (v->counter));
 }
 
-static __inline__ void local_sub(unsigned long i, local_t *v)
+static inline void local_sub(long i, local_t *v)
 {
 	__asm__ __volatile__(
-		"subl %1,%0"
+		"subq %1,%0"
 		:"=m" (v->counter)
 		:"ir" (i), "m" (v->counter));
 }
 
-/* On x86, these are no better than the atomic variants. */
+/* On x86-64 these are better than the atomic variants on SMP kernels
+   because they dont use a lock prefix. */
 #define __local_inc(l)		local_inc(l)
 #define __local_dec(l)		local_dec(l)
 #define __local_add(i,l)	local_add((i),(l))