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ext4: replace ext4_io_submit->io_op with ->io_wbc

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ext4_io_submit_init() takes the pointer to writeback_control to test
its sync_mode and determine between WRITE and WRITE_SYNC and records
the result in ->io_op.  This patch makes it record the pointer
directly and moves the test to ext4_io_submit().

This doesn't cause any noticeable differences now but having
writeback_control available throughout IO submission path will be
depended upon by the planned cgroup writeback support.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Tejun Heo 2015-07-21 23:50:24 -04:00 committed by Theodore Ts'o
parent 27977b69e4
commit 5a33911fa5
2 changed files with 5 additions and 3 deletions
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2
fs/ext4/ext4.h
View file

@ -187,7 +187,7 @@ typedef struct ext4_io_end {
} ext4_io_end_t;
struct ext4_io_submit {
int io_op;
struct writeback_control *io_wbc;
struct bio *io_bio;
ext4_io_end_t *io_end;
sector_t io_next_block;

6
fs/ext4/page-io.c
View file

@ -357,8 +357,10 @@ void ext4_io_submit(struct ext4_io_submit *io)
struct bio *bio = io->io_bio;
if (bio) {
int io_op = io->io_wbc->sync_mode == WB_SYNC_ALL ?
WRITE_SYNC : WRITE;
bio_get(io->io_bio);
submit_bio(io->io_op, io->io_bio);
submit_bio(io_op, io->io_bio);
bio_put(io->io_bio);
}
io->io_bio = NULL;
@ -367,7 +369,7 @@ void ext4_io_submit(struct ext4_io_submit *io)
void ext4_io_submit_init(struct ext4_io_submit *io,
struct writeback_control *wbc)
{
io->io_op = (wbc->sync_mode == WB_SYNC_ALL ? WRITE_SYNC : WRITE);
io->io_wbc = wbc;
io->io_bio = NULL;
io->io_end = NULL;
}