[PATCH] s390: test_bit return value
The test_bit function returns a non-boolean value, it returns 0,1,2,4,...
instead of only 0 or 1. This causes wrongs results in the mincore system
call. Check against 0 to get a proper boolean value.
Signed-off-by: Christian Borntraeger <cborntra@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/asm-s390/bitops.h b/include/asm-s390/bitops.h
index 8651524..b07c578 100644
--- a/include/asm-s390/bitops.h
+++ b/include/asm-s390/bitops.h
@@ -518,8 +518,8 @@
static inline int
__constant_test_bit(unsigned long nr, const volatile unsigned long *addr) {
- return (((volatile char *) addr)
- [(nr^(__BITOPS_WORDSIZE-8))>>3] & (1<<(nr&7)));
+ return ((((volatile char *) addr)
+ [(nr^(__BITOPS_WORDSIZE-8))>>3] & (1<<(nr&7)))) != 0;
}
#define test_bit(nr,addr) \