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Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1qM7zi-0068E6-Va; Wed, 19 Jul 2023 14:17:35 +0000 Date: Wed, 19 Jul 2023 15:17:34 +0100 From: Matthew Wilcox To: Peng Zhang Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, sidhartha.kumar@oracle.com, akpm@linux-foundation.org, wangkefeng.wang@huawei.com, sunnanyong@huawei.com Subject: Re: [PATCH v2 3/9] mm/page_io: convert bio_first_page_all() to bio_first_folio_all() Message-ID: References: <20230719095848.3422629-1-zhangpeng362@huawei.com> <20230719095848.3422629-4-zhangpeng362@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230719095848.3422629-4-zhangpeng362@huawei.com> X-Rspamd-Queue-Id: 016AA4002E X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: ngee8px48pfnek74naxqj1yccgu4cejx X-HE-Tag: 1689776265-341840 X-HE-Meta: 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 B/AHrRTk 6/YI3lz9tIvfcX9IQxOVmp5jw55gTwIvxG6mJsxKeArfScYxJFB43JulloG22cFLaavExGJ6VJXWELxEgssHZR0rzlJigSfu9u5+UxLpuvsnaL0RDJh2J0P0Vnr+FCphcrAi5T4EQl/sRpfrXTueXGf+Nl9I3Xzf0D0wCxDQqmQag0YnnZPOGTWrDk/LoYH6F0otLeaPBR8DJ3MSClOlERW2f5bSgMae/7fa59CBRnJb9FyCRgvA/wXY47A3CM5atM7wfR5I8+3vzLV0= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, Jul 19, 2023 at 05:58:42PM +0800, Peng Zhang wrote: > From: ZhangPeng > > Convert bio_first_page_all() to bio_first_folio_all() to return a > folio, which makes it easier to use. This wasn't what I was suggesting. Indeed, this may introduce bugs. I was suggesting adding bio_first_folio_all() so that it can be used by code that knows this is what it wants. > Suggested-by: Matthew Wilcox (Oracle) > Signed-off-by: ZhangPeng > --- > Documentation/block/biovecs.rst | 2 +- > drivers/block/drbd/drbd_bitmap.c | 2 +- > fs/f2fs/data.c | 2 +- > include/linux/bio.h | 4 ++-- > kernel/power/swap.c | 2 +- > mm/page_io.c | 4 ++-- > 6 files changed, 8 insertions(+), 8 deletions(-) > > diff --git a/Documentation/block/biovecs.rst b/Documentation/block/biovecs.rst > index ddb867e0185b..258f6faed333 100644 > --- a/Documentation/block/biovecs.rst > +++ b/Documentation/block/biovecs.rst > @@ -133,7 +133,7 @@ Usage of helpers: > bio_for_each_segment_all() > bio_for_each_bvec_all() > bio_first_bvec_all() > - bio_first_page_all() > + bio_first_folio_all() > bio_last_bvec_all() > > * The following helpers iterate over single-page segment. The passed 'struct > diff --git a/drivers/block/drbd/drbd_bitmap.c b/drivers/block/drbd/drbd_bitmap.c > index 85ca000a0564..ce1a07ba85ff 100644 > --- a/drivers/block/drbd/drbd_bitmap.c > +++ b/drivers/block/drbd/drbd_bitmap.c > @@ -939,7 +939,7 @@ static void drbd_bm_endio(struct bio *bio) > struct drbd_bm_aio_ctx *ctx = bio->bi_private; > struct drbd_device *device = ctx->device; > struct drbd_bitmap *b = device->bitmap; > - unsigned int idx = bm_page_to_idx(bio_first_page_all(bio)); > + unsigned int idx = bm_page_to_idx(&bio_first_folio_all(bio)->page); > > if ((ctx->flags & BM_AIO_COPY_PAGES) == 0 && > !bm_test_page_unchanged(b->bm_pages[idx])) > diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c > index 5882afe71d82..6706858de984 100644 > --- a/fs/f2fs/data.c > +++ b/fs/f2fs/data.c > @@ -288,7 +288,7 @@ static void f2fs_post_read_work(struct work_struct *work) > > static void f2fs_read_end_io(struct bio *bio) > { > - struct f2fs_sb_info *sbi = F2FS_P_SB(bio_first_page_all(bio)); > + struct f2fs_sb_info *sbi = F2FS_P_SB(&bio_first_folio_all(bio)->page); > struct bio_post_read_ctx *ctx; > bool intask = in_task(); > > diff --git a/include/linux/bio.h b/include/linux/bio.h > index c4f5b5228105..7d2979d24530 100644 > --- a/include/linux/bio.h > +++ b/include/linux/bio.h > @@ -248,9 +248,9 @@ static inline struct bio_vec *bio_first_bvec_all(struct bio *bio) > return bio->bi_io_vec; > } > > -static inline struct page *bio_first_page_all(struct bio *bio) > +static inline struct folio *bio_first_folio_all(struct bio *bio) > { > - return bio_first_bvec_all(bio)->bv_page; > + return page_folio(bio_first_bvec_all(bio)->bv_page); > } > > static inline struct bio_vec *bio_last_bvec_all(struct bio *bio) > diff --git a/kernel/power/swap.c b/kernel/power/swap.c > index f6ebcd00c410..2796ce48ca4b 100644 > --- a/kernel/power/swap.c > +++ b/kernel/power/swap.c > @@ -247,7 +247,7 @@ static void hib_finish_batch(struct hib_bio_batch *hb) > static void hib_end_io(struct bio *bio) > { > struct hib_bio_batch *hb = bio->bi_private; > - struct page *page = bio_first_page_all(bio); > + struct page *page = &bio_first_folio_all(bio)->page; > > if (bio->bi_status) { > pr_alert("Read-error on swap-device (%u:%u:%Lu)\n", > diff --git a/mm/page_io.c b/mm/page_io.c > index 5ddb5d9c5013..e21d570c873d 100644 > --- a/mm/page_io.c > +++ b/mm/page_io.c > @@ -29,7 +29,7 @@ > > static void __end_swap_bio_write(struct bio *bio) > { > - struct page *page = bio_first_page_all(bio); > + struct page *page = &bio_first_folio_all(bio)->page; > > if (bio->bi_status) { > /* > @@ -57,7 +57,7 @@ static void end_swap_bio_write(struct bio *bio) > > static void __end_swap_bio_read(struct bio *bio) > { > - struct page *page = bio_first_page_all(bio); > + struct page *page = &bio_first_folio_all(bio)->page; > > if (bio->bi_status) { > pr_alert_ratelimited("Read-error on swap-device (%u:%u:%llu)\n", > -- > 2.25.1 >