[LV-k25-commit] CVS: kernel-2.5/include/asm-vax bitops.h,1.4,1.5

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

Update of /cvsroot/linux-vax/kernel-2.5/include/asm-vax
In directory usw-pr-cvs1:/tmp/cvs-serv17366

Modified Files:
	bitops.h 
Log Message:
Added __ffs() (works like ffz() in that result is undefined if no bit is 
set in argument - contrast with ffs() which returns -1 if nothing set)


Index: bitops.h
===================================================================
RCS file: /cvsroot/linux-vax/kernel-2.5/include/asm-vax/bitops.h,v
retrieving revision 1.4
retrieving revision 1.5
diff -u -r1.4 -r1.5
--- bitops.h	5 Jun 2002 21:55:04 -0000	1.4
+++ bitops.h	6 Jun 2002 00:06:11 -0000	1.5
@@ -341,6 +341,20 @@
 	return word;
 }
 
+/**
+ * __ffs - find first bit in word.
+ * @word: The word to search
+ *
+ * Undefined if no bit exists, so code should check against 0 first.
+ */
+static __inline__ unsigned long __ffs(unsigned long word)
+{
+	__asm__("ffs $0, $32, %1 , %0\n"
+		:"=ir" (word)
+		:"ir" (word));
+	return word;
+}
+
 #ifdef __KERNEL__
 /**
  * ffs - find first bit set