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ext4: Update comment in mpage_prepare_extent_to_map() 

Since filemap_write_and_wait() is now enough to get journalled data to
final location update the comment in mpage_prepare_extent_to_map().

Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20230329154950.19720-12-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Jan Kara 2023-03-29 17:49:43 +02:00 committed by Theodore Ts'o
parent 951cafa6b8
commit ab382539ad
1 changed files with 4 additions and 5 deletions
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9
fs/ext4/inode.c
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@ -2496,11 +2496,10 @@ static int mpage_prepare_extent_to_map(struct mpage_da_data *mpd)
* Just submit the page. For data=journal mode we
* first handle writeout of the page for checkpoint and
* only after that handle delayed page dirtying. This
* is crutial so that forcing a transaction commit and
* then calling filemap_write_and_wait() guarantees
* current state of data is in its final location. Such
* sequence is used for example by insert/collapse
* range operations before discarding the page cache.
* makes sure current data is checkpointed to the final
* location before possibly journalling it again which
* is desirable when the page is frequently dirtied
* through a pin.
*/
if (!mpd->can_map) {
WARN_ON_ONCE(sb->s_writers.frozen ==