patch-2.3.30 linux/include/asm-i386/atomic.h

• Lines: 18
• Date: Mon Dec 6 17:22:06 1999
• Orig file: v2.3.29/linux/include/asm-i386/atomic.h
• Orig date: Thu Aug 26 13:05:40 1999

diff -u --recursive --new-file v2.3.29/linux/include/asm-i386/atomic.h linux/include/asm-i386/atomic.h
@@ -46,6 +46,17 @@
 		:"ir" (i), "m" (__atomic_fool_gcc(v)));
 }
 
+static __inline__ int atomic_sub_and_test(int i, volatile atomic_t *v)
+{
+	unsigned char c;
+
+	__asm__ __volatile__(
+		LOCK "subl %2,%0; sete %1"
+		:"=m" (__atomic_fool_gcc(v)), "=qm" (c)
+		:"ir" (i), "m" (__atomic_fool_gcc(v)));
+	return c;
+}
+
 static __inline__ void atomic_inc(volatile atomic_t *v)
 {
 	__asm__ __volatile__(