[LV-kern-commit] CVS: kernel-2.4/include/asm-vax atomic.h,1.1,1.2

[Kenn H. <ke...@us...>]

Update of /cvsroot/linux-vax/kernel-2.4/include/asm-vax
In directory usw-pr-cvs1:/tmp/cvs-serv25963

Modified Files:
	atomic.h 
Log Message:
Added atomic_add_negative (returns non-zero if count still negative

Index: atomic.h
===================================================================
RCS file: /cvsroot/linux-vax/kernel-2.4/include/asm-vax/atomic.h,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -r1.1 -r1.2
--- atomic.h	2001/01/17 16:18:52	1.1
+++ atomic.h	2001/01/29 00:44:21	1.2
@@ -94,5 +94,20 @@
 
 #define atomic_sub_and_test(i,v) (atomic_sub_return((i), (v)) == 0)
 
+/* This one returns non-zero if the result is negative */
+static __inline__ int atomic_add_negative(int i, atomic_t *v)
+{
+	int retval = 0;
+	__asm__ __volatile__(
+		"	addl2 %2,%1 \n" 
+		"	blss 1f     \n"
+		"	incl %0     \n"
+		"1:		    \n"
+		: "=g" (retval) 
+		: "m" (*v), "g" (i));
+
+	return retval;
+}
+
 
 #endif /* _ARCH_VAX_ATOMIC*/