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Commit 187dfc67 authored by Christian Borntraeger's avatar Christian Borntraeger Committed by Linus Torvalds
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[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: default avatarChristian Borntraeger <cborntra@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent d4b68996

include/asm-s390/bitops.h

+2 −2
Original line number Diff line number Diff line
@@ -518,8 +518,8 @@ static inline int __test_bit(unsigned long nr, const volatile unsigned long *ptr 


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) \