bitops: fix test_and_change_bit()

./bitops.h:192: warning: ‘old’ is used uninitialized in this function

Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

diff --git a/bitops.h b/bitops.h
index ae7bcb1..e2b9df3 100644 (file)
--- a/bitops.h
+++ b/bitops.h
@@ -187,7 +187,7 @@ static inline int test_and_change_bit(int nr, volatile unsigned long *addr)
 {
        unsigned long mask = BIT_MASK(nr);
        unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
-       unsigned long old;
+       unsigned long old = *p;
 
        *p = old ^ mask;
        return (old & mask) != 0;