tree eb28b9003453d55c21b81da63ce1fb4a897023ed
parent 210c6f1caa451623e14a7cd71000d2c2e0d9cc43
author David Chinner <dgc@sgi.com> 1181024655 +1000
committer Tim Shimmin <tes@chook.melbourne.sgi.com> 1184390977 +1000

[XFS] xfs_bmapi fails to update the previous extent pointer

When processing multiple extent maps, xfs_bmapi needs to keep track of the
extent behind the one it is currently working on to be able to trim extent
ranges correctly. Failing to update the previous pointer can result in
corrupted extent lists in memory and this will result in panics or assert
failures.

Update the previous pointer correctly when we move to the next extent to
process.

SGI-PV: 965631
SGI-Modid: xfs-linux-melb:xfs-kern:28773a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Vlad Apostolov <vapo@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>