tree cad3f1ee096243529125b3d6a028cc1426773b9c
parent e2d670523c6c4ccb0fca9f3ab1b8f066d9aa57d6
author Theodore Ts'o <tytso@mit.edu> 1241141044 -0400
committer Theodore Ts'o <tytso@mit.edu> 1241141044 -0400

ext4: Fix and simplify s_dirt handling

The s_dirt flag wasn't completely handled correctly, but it didn't
really matter when journalling was enabled.  It turns out that when
ext4 runs without a journal, we don't clear s_dirt in places where we
should have, with the result that the high-level write_super()
function was writing the superblock when it wasn't necessary.

So we fix this by making ext4_commit_super() clear the s_dirt flag,
and removing many of the other places where s_dirt is manipulated.
When journalling is enabled, the s_dirt flag might be left set more
often, but s_dirt really doesn't matter when journalling is enabled.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>