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This patch cleans up 2 of it's caller in jbd2 to drop submit_bh's useless return value. Once all submit_bh callers are cleaned up, we can make it's return type as void. Signed-off-by: Ritesh Harjani Reviewed-by: Christoph Hellwig Reviewed-by: Jan Kara --- fs/jbd2/commit.c | 11 +++++------ fs/jbd2/journal.c | 6 ++---- 2 files changed, 7 insertions(+), 10 deletions(-) diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c index eb315e81f1a6..688fd960d01f 100644 --- a/fs/jbd2/commit.c +++ b/fs/jbd2/commit.c @@ -122,8 +122,8 @@ static int journal_submit_commit_record(journal_t *journal, { struct commit_header *tmp; struct buffer_head *bh; - int ret; struct timespec64 now; + int write_flags = REQ_SYNC; *cbh = NULL; @@ -155,13 +155,12 @@ static int journal_submit_commit_record(journal_t *journal, if (journal->j_flags & JBD2_BARRIER && !jbd2_has_feature_async_commit(journal)) - ret = submit_bh(REQ_OP_WRITE, - REQ_SYNC | REQ_PREFLUSH | REQ_FUA, bh); - else - ret = submit_bh(REQ_OP_WRITE, REQ_SYNC, bh); + write_flags |= REQ_PREFLUSH | REQ_FUA; + + submit_bh(REQ_OP_WRITE, write_flags, bh); *cbh = bh; - return ret; + return 0; } /* diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index c0cbeeaec2d1..81a282e676bc 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -1606,7 +1606,7 @@ static int jbd2_write_superblock(journal_t *journal, int write_flags) { struct buffer_head *bh = journal->j_sb_buffer; journal_superblock_t *sb = journal->j_superblock; - int ret; + int ret = 0; /* Buffer got discarded which means block device got invalidated */ if (!buffer_mapped(bh)) { @@ -1636,14 +1636,12 @@ static int jbd2_write_superblock(journal_t *journal, int write_flags) sb->s_checksum = jbd2_superblock_csum(journal, sb); get_bh(bh); bh->b_end_io = end_buffer_write_sync; - ret = submit_bh(REQ_OP_WRITE, write_flags, bh); + submit_bh(REQ_OP_WRITE, write_flags, bh); wait_on_buffer(bh); if (buffer_write_io_error(bh)) { clear_buffer_write_io_error(bh); set_buffer_uptodate(bh); ret = -EIO; - } - if (ret) { printk(KERN_ERR "JBD2: Error %d detected when updating " "journal superblock for %s.\n", ret, journal->j_devname); From patchwork Mon Jun 20 05:58:41 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Ritesh Harjani (IBM)" X-Patchwork-Id: 1645233 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; 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Sun, 19 Jun 2022 22:59:36 -0700 (PDT) Received: from localhost ([2406:7400:63:5d34:e6c2:4c64:12ae:aa11]) by smtp.gmail.com with ESMTPSA id v20-20020a17090331d400b001641047544bsm7709664ple.103.2022.06.19.22.59.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 19 Jun 2022 22:59:35 -0700 (PDT) From: Ritesh Harjani To: linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org Cc: Jan Kara , Alexander Viro , Ritesh Harjani Subject: [RFC 2/3] fs/buffer: Drop useless return value of submit_bh Date: Mon, 20 Jun 2022 11:28:41 +0530 Message-Id: <77274d2a2030f6ee06901496f9c5fbe8779127a3.1655703467.git.ritesh.list@gmail.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: References: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM, RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org submit_bh always returns 0. This patch drops the useless return value of submit_bh from __sync_dirty_buffer(). Once all of submit_bh callers are cleaned up, we can make it's return type as void. Signed-off-by: Ritesh Harjani Reviewed-by: Christoph Hellwig Reviewed-by: Jan Kara --- fs/buffer.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/fs/buffer.c b/fs/buffer.c index 898c7f301b1b..313283af15b6 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -3121,8 +3121,6 @@ EXPORT_SYMBOL(write_dirty_buffer); */ int __sync_dirty_buffer(struct buffer_head *bh, int op_flags) { - int ret = 0; - WARN_ON(atomic_read(&bh->b_count) < 1); lock_buffer(bh); if (test_clear_buffer_dirty(bh)) { @@ -3137,14 +3135,14 @@ int __sync_dirty_buffer(struct buffer_head *bh, int op_flags) get_bh(bh); bh->b_end_io = end_buffer_write_sync; - ret = submit_bh(REQ_OP_WRITE, op_flags, bh); + submit_bh(REQ_OP_WRITE, op_flags, bh); wait_on_buffer(bh); - if (!ret && !buffer_uptodate(bh)) - ret = -EIO; + if (!buffer_uptodate(bh)) + return -EIO; } else { unlock_buffer(bh); } - return ret; + return 0; } EXPORT_SYMBOL(__sync_dirty_buffer); From patchwork Mon Jun 20 05:58:42 2022 Content-Type: text/plain; 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Sun, 19 Jun 2022 22:59:41 -0700 (PDT) Received: from localhost ([2406:7400:63:5d34:e6c2:4c64:12ae:aa11]) by smtp.gmail.com with ESMTPSA id 144-20020a621796000000b0051b693baadcsm7934601pfx.205.2022.06.19.22.59.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 19 Jun 2022 22:59:41 -0700 (PDT) From: Ritesh Harjani To: linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org Cc: Jan Kara , Alexander Viro , Ritesh Harjani Subject: [RFC 3/3] fs/buffer: Make submit_bh & submit_bh_wbc return type as void Date: Mon, 20 Jun 2022 11:28:42 +0530 Message-Id: X-Mailer: git-send-email 2.35.3 In-Reply-To: References: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM, RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org submit_bh/submit_bh_wbc are non-blocking functions which just submits the bio and returns. The caller of submit_bh/submit_bh_wbc needs to wait on buffer till I/O completion and then check buffer head's b_state field to know if there was any I/O error. Hence there is no need for these functions to have any return type. Even now they always returns 0. Hence drop the return value and make their return type as void to avoid any confusion. Signed-off-by: Ritesh Harjani Reviewed-by: Christoph Hellwig Reviewed-by: Jan Kara --- fs/buffer.c | 9 ++++----- include/linux/buffer_head.h | 2 +- 2 files changed, 5 insertions(+), 6 deletions(-) diff --git a/fs/buffer.c b/fs/buffer.c index 313283af15b6..6671abc98e21 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -52,7 +52,7 @@ #include "internal.h" static int fsync_buffers_list(spinlock_t *lock, struct list_head *list); -static int submit_bh_wbc(int op, int op_flags, struct buffer_head *bh, +static void submit_bh_wbc(int op, int op_flags, struct buffer_head *bh, struct writeback_control *wbc); #define BH_ENTRY(list) list_entry((list), struct buffer_head, b_assoc_buffers) @@ -2994,7 +2994,7 @@ static void end_bio_bh_io_sync(struct bio *bio) bio_put(bio); } -static int submit_bh_wbc(int op, int op_flags, struct buffer_head *bh, +static void submit_bh_wbc(int op, int op_flags, struct buffer_head *bh, struct writeback_control *wbc) { struct bio *bio; @@ -3037,12 +3037,11 @@ static int submit_bh_wbc(int op, int op_flags, struct buffer_head *bh, } submit_bio(bio); - return 0; } -int submit_bh(int op, int op_flags, struct buffer_head *bh) +void submit_bh(int op, int op_flags, struct buffer_head *bh) { - return submit_bh_wbc(op, op_flags, bh, NULL); + submit_bh_wbc(op, op_flags, bh, NULL); } EXPORT_SYMBOL(submit_bh); diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h index c9d1463bb20f..392d7d5aec05 100644 --- a/include/linux/buffer_head.h +++ b/include/linux/buffer_head.h @@ -205,7 +205,7 @@ void ll_rw_block(int, int, int, struct buffer_head * bh[]); int sync_dirty_buffer(struct buffer_head *bh); int __sync_dirty_buffer(struct buffer_head *bh, int op_flags); void write_dirty_buffer(struct buffer_head *bh, int op_flags); -int submit_bh(int, int, struct buffer_head *); +void submit_bh(int op, int op_flags, struct buffer_head *bh); void write_boundary_block(struct block_device *bdev, sector_t bblock, unsigned blocksize); int bh_uptodate_or_lock(struct buffer_head *bh);