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Message-Id: <1434495193-31182-2-git-send-email-tj@kernel.org> Date: Tue, 16 Jun 2015 18:53:12 -0400 From: Tejun Heo <tj@...nel.org> To: axboe@...nel.dk Cc: linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org, lizefan@...wei.com, cgroups@...r.kernel.org, hannes@...xchg.org, kernel-team@...com, tytso@....edu, adilger.kernel@...ger.ca, linux-ext4@...r.kernel.org, Tejun Heo <tj@...nel.org> Subject: [PATCH 1/2] ext4: replace ext4_io_submit->io_op with ->io_wbc 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@...nel.org> Cc: "Theodore Ts'o" <tytso@....edu> Cc: Andreas Dilger <adilger.kernel@...ger.ca> Cc: linux-ext4@...r.kernel.org --- fs/ext4/ext4.h | 2 +- fs/ext4/page-io.c | 6 ++++-- 2 files changed, 5 insertions(+), 3 deletions(-) diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 009a059..74a4923 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -191,7 +191,7 @@ 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; diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c index c5d81e8..3f80cb2 100644 --- a/fs/ext4/page-io.c +++ b/fs/ext4/page-io.c @@ -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; } -- 2.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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