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block: remove BLKDEV_IFL_WAIT

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All the blkdev_issue_* helpers can only sanely be used for synchronous
caller.  To issue cache flushes or barriers asynchronously the caller needs
to set up a bio by itself with a completion callback to move the asynchronous
state machine ahead.  So drop the BLKDEV_IFL_WAIT flag that is always
specified when calling blkdev_issue_* and also remove the now unused flags
argument to blkdev_issue_flush and blkdev_issue_zeroout.  For
blkdev_issue_discard we need to keep it for the secure discard flag, which
gains a more descriptive name and loses the bitops vs flag confusion.

Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Christoph Hellwig 2010-09-16 20:51:46 +02:00 • committed by Jens Axboe
commit dd3932eddf
19 changed files with 47 additions and 71 deletions
Download patch file Download diff file Expand all files Collapse all files

3
fs/jbd2/checkpoint.c
View file

@ -532,8 +532,7 @@ int jbd2_cleanup_journal_tail(journal_t *journal)
*/
if ((journal->j_fs_dev != journal->j_dev) &&
(journal->j_flags & JBD2_BARRIER))
blkdev_issue_flush(journal->j_fs_dev, GFP_KERNEL, NULL,
BLKDEV_IFL_WAIT);
blkdev_issue_flush(journal->j_fs_dev, GFP_KERNEL, NULL);
if (!(journal->j_flags & JBD2_ABORT))
jbd2_journal_update_superblock(journal, 1);
return 0;

6
fs/jbd2/commit.c
View file

@ -684,8 +684,7 @@ start_journal_io:
if (commit_transaction->t_flushed_data_blocks &&
(journal->j_fs_dev != journal->j_dev) &&
(journal->j_flags & JBD2_BARRIER))
blkdev_issue_flush(journal->j_fs_dev, GFP_KERNEL, NULL,
BLKDEV_IFL_WAIT);
blkdev_issue_flush(journal->j_fs_dev, GFP_KERNEL, NULL);
/* Done it all: now write the commit record asynchronously. */
if (JBD2_HAS_INCOMPAT_FEATURE(journal,
@ -810,8 +809,7 @@ wait_for_iobuf:
if (JBD2_HAS_INCOMPAT_FEATURE(journal,
JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT) &&
journal->j_flags & JBD2_BARRIER) {
blkdev_issue_flush(journal->j_dev, GFP_KERNEL, NULL,
BLKDEV_IFL_WAIT);
blkdev_issue_flush(journal->j_dev, GFP_KERNEL, NULL);
}
if (err)