| Message ID | 20230502101934.24901-5-johannes.thumshirn@wdc.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | bio: check return values of bio_add_page | expand |
> > The buffer_head submission code uses bio_add_page() to add a page to a > newly created bio. bio_add_page() can fail, but the return value is never > checked. > > Use __bio_add_page() as adding a single page to a newly created bio is > guaranteed to succeed. > > This brings us a step closer to marking bio_add_page() as __must_check. > > Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> > Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> > --- > fs/buffer.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/fs/buffer.c b/fs/buffer.c > index a7fc561758b1..5abc26d8399d 100644 > --- a/fs/buffer.c > +++ b/fs/buffer.c > @@ -2760,7 +2760,7 @@ static void submit_bh_wbc(blk_opf_t opf, struct buffer_head *bh, > > bio->bi_iter.bi_sector = bh->b_blocknr * (bh->b_size >> 9); > > - bio_add_page(bio, bh->b_page, bh->b_size, bh_offset(bh)); > + __bio_add_page(bio, bh->b_page, bh->b_size, bh_offset(bh)); > BUG_ON(bio->bi_iter.bi_size != bh->b_size); Can `BUG_ON` be deleted now ? > > bio->bi_end_io = end_bio_bh_io_sync; > -- > 2.40.0 -- thanks, Gou Hao
diff --git a/fs/buffer.c b/fs/buffer.c index a7fc561758b1..5abc26d8399d 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -2760,7 +2760,7 @@ static void submit_bh_wbc(blk_opf_t opf, struct buffer_head *bh, bio->bi_iter.bi_sector = bh->b_blocknr * (bh->b_size >> 9); - bio_add_page(bio, bh->b_page, bh->b_size, bh_offset(bh)); + __bio_add_page(bio, bh->b_page, bh->b_size, bh_offset(bh)); BUG_ON(bio->bi_iter.bi_size != bh->b_size); bio->bi_end_io = end_bio_bh_io_sync;