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Subject[PATCH 15/20] Re: [2.6-BK-URL] NTFS 2.1.17 release
This is patch 15/20 in the series.  It contains the following ChangeSet:

<aia21@cantab.net> (04/08/17 1.1821)
NTFS: Minor update to fs/ntfs/bitmap.c to only perform rollback if at
least one bit has actually been changed.

Signed-off-by: Anton Altaparmakov <aia21@cantab.net>

Best regards,

Anton
--
Anton Altaparmakov <aia21 at cam.ac.uk> (replace at with @)
Unix Support, Computing Service, University of Cambridge, CB2 3QH, UK
Linux NTFS maintainer / IRC: #ntfs on irc.freenode.net
WWW: http://linux-ntfs.sf.net/, http://www-stu.christs.cam.ac.uk/~aia21/

===================================================================

diff -Nru a/fs/ntfs/bitmap.c b/fs/ntfs/bitmap.c
--- a/fs/ntfs/bitmap.c 2004-08-18 20:50:34 +01:00
+++ b/fs/ntfs/bitmap.c 2004-08-18 20:50:34 +01:00
@@ -115,7 +115,7 @@
len += pos;

/* If we are not in the last page, deal with all subsequent pages. */
- while (end_index > index) {
+ while (index < end_index) {
BUG_ON(cnt <= 0);

/* Update @index and get the next page. */
@@ -168,8 +168,11 @@
*/
if (is_rollback)
return PTR_ERR(page);
- pos = __ntfs_bitmap_set_bits_in_run(vi, start_bit, count - cnt,
- value ? 0 : 1, TRUE);
+ if (count != cnt)
+ pos = __ntfs_bitmap_set_bits_in_run(vi, start_bit, count - cnt,
+ value ? 0 : 1, TRUE);
+ else
+ pos = 0;
if (!pos) {
/* Rollback was successful. */
ntfs_error(vi->i_sb, "Failed to map subsequent page (error "
-
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