]> git.proxmox.com Git - mirror_ubuntu-disco-kernel.git/commit
ext4: Restore wbc->range_start in ext4_da_writepages()
authorTheodore Ts'o <tytso@mit.edu>
Mon, 31 Aug 2009 21:00:59 +0000 (17:00 -0400)
committerTheodore Ts'o <tytso@mit.edu>
Mon, 31 Aug 2009 21:00:59 +0000 (17:00 -0400)
commitde89de6e0cf4b1eb13f27137cf2aa40d287aabdf
treeb6429d327cb0a6985d3fd9bf11755353408ee44c
parent98a56ab382079f777e261e14512cbd4fb2107af4
ext4: Restore wbc->range_start in ext4_da_writepages()

To solve a lock inversion problem, we implement part of the
range_cyclic algorithm in ext4_da_writepages().  (See commit 2acf2c26
for more details.)

As part of that change wbc->range_start was modified by ext4's
writepages function, which causes its callers to get confused since
they aren't expecting the filesystem to modify it.  The simplest fix
is to save and restore wbc->range_start in ext4_da_writepages.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
fs/ext4/inode.c