Konstantin Belousov wrote:
Author: kib
Date: Sun Jan 4 15:56:49 2009
New Revision: 186740
URL: http://svn.freebsd.org/changeset/base/186740
Log:
Do not incorrectly add the low 5 bits of the offset to the resulting
position of the found zero bit.
Submitted by: Jaakko Heinonen <jh saunalahti fi>
MFC after: 2 weeks
Modified:
head/sys/gnu/fs/ext2fs/ext2_bitops.h
Does this fix ext2fs on amd64?
Kris
Modified: head/sys/gnu/fs/ext2fs/ext2_bitops.h
==============================================================================
--- head/sys/gnu/fs/ext2fs/ext2_bitops.h Sun Jan 4 15:49:30 2009
(r186739)
+++ head/sys/gnu/fs/ext2fs/ext2_bitops.h Sun Jan 4 15:56:49 2009
(r186740)
@@ -84,7 +84,7 @@ find_next_zero_bit(void *data, size_t sz
mask = ~0U << (ofs & 31);
bit = *p | ~mask;
if (bit != ~0U)
- return (ffs(~bit) + ofs - 1);
+ return (ffs(~bit) + (ofs & ~31U) - 1);
p++;
ofs = (ofs + 31U) & ~31U;
}
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