svn commit: r186740 - head/sys/gnu/fs/ext2fs

[Konstantin Belousov]

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

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;
 	}