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s390/bitops: fix find_next_bit_left
authorMartin Schwidefsky <schwidefsky@de.ibm.com>
Thu, 25 Jul 2013 08:18:17 +0000 (10:18 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Mon, 12 Aug 2013 01:35:25 +0000 (18:35 -0700)
commitfa2446744dd5a99a3938aad9faade9b8928aec48
treeed56acf132f5d54553e2e4383c929f341addbb5btree | snapshot
parent72e2729ea923cbbbeda03e5fce14f50b0707f724commit | diff
s390/bitops: fix find_next_bit_left

commit 3b0040a47ad63f7147e9e7d2febb61a3b564bb90 upstream.

The find_next_bit_left function is broken if used with an offset which
is not a multiple of 64. The shift to mask the bits of a 64-bit word
not to search is in the wrong direction, the result can be either a
bit found smaller than the offset or failure to find a set bit.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
arch/s390/include/asm/bitops.h diff | blob | history
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