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Mon, 22 Sep 2025 17:33:55 -0700 (PDT) From: Joanne Koong To: brauner@kernel.org, miklos@szeredi.hu Cc: djwong@kernel.org, hch@infradead.org, linux-block@vger.kernel.org, gfs2@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org, linux-doc@vger.kernel.org, hsiangkao@linux.alibaba.com, kernel-team@meta.com Subject: [PATCH v4 02/15] iomap: move read/readahead bio submission logic into helper function Date: Mon, 22 Sep 2025 17:23:40 -0700 Message-ID: <20250923002353.2961514-3-joannelkoong@gmail.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20250923002353.2961514-1-joannelkoong@gmail.com> References: <20250923002353.2961514-1-joannelkoong@gmail.com> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Move the read/readahead bio submission logic into a separate helper. This is needed to make iomap read/readahead more generically usable, especially for filesystems that do not require CONFIG_BLOCK. Signed-off-by: Joanne Koong Reviewed-by: "Darrick J. Wong" --- fs/iomap/buffered-io.c | 30 ++++++++++++++++-------------- 1 file changed, 16 insertions(+), 14 deletions(-) diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index 7e65075b6345..f8b985bb5a6b 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -367,6 +367,14 @@ struct iomap_readpage_ctx { struct readahead_control *rac; }; +static void iomap_bio_submit_read(struct iomap_readpage_ctx *ctx) +{ + struct bio *bio = ctx->bio; + + if (bio) + submit_bio(bio); +} + static void iomap_bio_read_folio_range(const struct iomap_iter *iter, struct iomap_readpage_ctx *ctx, loff_t pos, size_t plen) { @@ -392,8 +400,7 @@ static void iomap_bio_read_folio_range(const struct iomap_iter *iter, gfp_t orig_gfp = gfp; unsigned int nr_vecs = DIV_ROUND_UP(length, PAGE_SIZE); - if (ctx->bio) - submit_bio(ctx->bio); + iomap_bio_submit_read(ctx); if (ctx->rac) /* same as readahead_gfp_mask */ gfp |= __GFP_NORETRY | __GFP_NOWARN; @@ -488,13 +495,10 @@ int iomap_read_folio(struct folio *folio, const struct iomap_ops *ops) while ((ret = iomap_iter(&iter, ops)) > 0) iter.status = iomap_read_folio_iter(&iter, &ctx); - if (ctx.bio) { - submit_bio(ctx.bio); - WARN_ON_ONCE(!ctx.cur_folio_in_bio); - } else { - WARN_ON_ONCE(ctx.cur_folio_in_bio); + iomap_bio_submit_read(&ctx); + + if (!ctx.cur_folio_in_bio) folio_unlock(folio); - } /* * Just like mpage_readahead and block_read_full_folio, we always @@ -560,12 +564,10 @@ void iomap_readahead(struct readahead_control *rac, const struct iomap_ops *ops) while (iomap_iter(&iter, ops) > 0) iter.status = iomap_readahead_iter(&iter, &ctx); - if (ctx.bio) - submit_bio(ctx.bio); - if (ctx.cur_folio) { - if (!ctx.cur_folio_in_bio) - folio_unlock(ctx.cur_folio); - } + iomap_bio_submit_read(&ctx); + + if (ctx.cur_folio && !ctx.cur_folio_in_bio) + folio_unlock(ctx.cur_folio); } EXPORT_SYMBOL_GPL(iomap_readahead); -- 2.47.3