patch-2.3.99-pre7 linux/include/asm-ppc/atomic.h

• Lines: 133
• Date: Tue May 2 13:05:40 2000
• Orig file: v2.3.99-pre6/linux/include/asm-ppc/atomic.h
• Orig date: Wed Apr 26 16:34:09 2000

diff -u --recursive --new-file v2.3.99-pre6/linux/include/asm-ppc/atomic.h linux/include/asm-ppc/atomic.h
@@ -18,94 +18,60 @@
 #define atomic_read(v)		((v)->counter)
 #define atomic_set(v,i)		(((v)->counter) = (i))
 
-extern void atomic_add(int a, atomic_t *v);
-extern int  atomic_add_return(int a, atomic_t *v);
-extern void atomic_sub(int a, atomic_t *v);
-extern void atomic_inc(atomic_t *v);
-extern int  atomic_inc_return(atomic_t *v);
-extern void atomic_dec(atomic_t *v);
-extern int  atomic_dec_return(atomic_t *v);
-extern int  atomic_dec_and_test(atomic_t *v);
-
 extern void atomic_clear_mask(unsigned long mask, unsigned long *addr);
 extern void atomic_set_mask(unsigned long mask, unsigned long *addr);
 
-#if 0	/* for now */
-extern __inline__ void atomic_add(atomic_t a, atomic_t *v)
+extern __inline__ int atomic_add_return(int a, atomic_t *v)
 {
-	atomic_t t;
+	int t;
 
 	__asm__ __volatile__("\n\
 1:	lwarx	%0,0,%3\n\
 	add	%0,%2,%0\n\
 	stwcx.	%0,0,%3\n\
-	bne	1b"
+	bne-	1b"
 	: "=&r" (t), "=m" (*v)
-	: "r" (a), "r" (v)
+	: "r" (a), "r" (v), "m" (*v)
 	: "cc");
-}
 
-extern __inline__ void atomic_sub(atomic_t a, atomic_t *v)
-{
-	atomic_t t;
-
-	__asm__ __volatile__("\n\
-1:	lwarx	%0,0,%3\n\
-	subf	%0,%2,%0\n\
-	stwcx.	%0,0,%3\n\
-	bne	1b"
-	: "=&r" (t), "=m" (*v)
-	: "r" (a), "r" (v)
-	: "cc");
+	return t;
 }
 
-extern __inline__ int atomic_sub_and_test(atomic_t a, atomic_t *v)
+extern __inline__ int atomic_sub_return(int a, atomic_t *v)
 {
-	atomic_t t;
+	int t;
 
 	__asm__ __volatile__("\n\
 1:	lwarx	%0,0,%3\n\
 	subf	%0,%2,%0\n\
 	stwcx.	%0,0,%3\n\
-	bne	1b"
+	bne-	1b"
 	: "=&r" (t), "=m" (*v)
-	: "r" (a), "r" (v)
+	: "r" (a), "r" (v), "m" (*v)
 	: "cc");
 
-	return t == 0;
+	return t;
 }
 
-extern __inline__ void atomic_inc(atomic_t *v)
+extern __inline__ int atomic_inc_return(atomic_t *v)
 {
-	atomic_t t;
+	int t;
 
 	__asm__ __volatile__("\n\
 1:	lwarx	%0,0,%2\n\
 	addic	%0,%0,1\n\
 	stwcx.	%0,0,%2\n\
-	bne	1b"
+	bne-	1b"
 	: "=&r" (t), "=m" (*v)
-	: "r" (v)
+	: "r" (v), "m" (*v)
 	: "cc");
-}
-
-extern __inline__ void atomic_dec(atomic_t *v)
-{
-	atomic_t t;
 
-	__asm__ __volatile__("\n\
-1:	lwarx	%0,0,%2\n\
-	addic	%0,%0,-1\n\
-	stwcx.	%0,0,%2\n\
-	bne	1b"
-	: "=&r" (t), "=m" (*v)
-	: "r" (v)
-	: "cc");
+	return t;
 }
 
-extern __inline__ int atomic_dec_and_test(atomic_t *v)
+extern __inline__ int atomic_dec_return(atomic_t *v)
 {
-	atomic_t t;
+	int t;
 
 	__asm__ __volatile__("\n\
 1:	lwarx	%0,0,%2\n\
@@ -113,11 +79,17 @@
 	stwcx.	%0,0,%2\n\
 	bne	1b"
 	: "=&r" (t), "=m" (*v)
-	: "r" (v)
+	: "r" (v), "m" (*v)
 	: "cc");
 
-	return t == 0;
+	return t;
 }
-#endif /* 0 */
+
+#define atomic_add(a, v)		((void) atomic_add_return((a), (v)))
+#define atomic_sub(a, v)		((void) atomic_sub_return((a), (v)))
+#define atomic_sub_and_test(a, v)	(atomic_sub_return((a), (v)) == 0)
+#define atomic_inc(v)			((void) atomic_inc_return((v)))
+#define atomic_dec(v)			((void) atomic_dec_return((v)))
+#define atomic_dec_and_test(v)		(atomic_dec_return((v)) == 0)
 
 #endif /* _ASM_PPC_ATOMIC_H_ */