We have two functions for adding a page to a bio, __bio_add_page() which is used to add a single page to a freshly created bio and bio_add_page() which is used to add a page to an existing bio. While __bio_add_page() is expected to succeed, bio_add_page() can fail. This series converts the callers of bio_add_page() which can easily use __bio_add_page() to using it and checks the return of bio_add_page() for callers that don't work on a freshly created bio. Lastly it marks bio_add_page() as __must_check so we don't have to go again and audit all callers. NOTE: David already applied the two btrfs patches to his tree but I've left them in the series to make the build bot happy. Changes to v2: - Removed 'wont fail' comments pointed out by Song Changes to v1: - Removed pointless comment pointed out by Willy - Changed commit messages pointed out by Damien - Colledted Damien's Reviews and Acks Johannes Thumshirn (19): swap: use __bio_add_page to add page to bio drbd: use __bio_add_page to add page to bio dm: dm-zoned: use __bio_add_page for adding single metadata page fs: buffer: use __bio_add_page to add single page to bio md: use __bio_add_page to add single page md: raid5-log: use __bio_add_page to add single page md: raid5: use __bio_add_page to add single page to new bio btrfs: repair: use __bio_add_page for adding single page btrfs: raid56: use __bio_add_page to add single page jfs: logmgr: use __bio_add_page to add single page to bio gfs: use __bio_add_page for adding single page to bio zonefs: use __bio_add_page for adding single page to bio zram: use __bio_add_page for adding single page to bio floppy: use __bio_add_page for adding single page to bio md: check for failure when adding pages in alloc_behind_master_bio md: raid1: use __bio_add_page for adding single page to bio md: raid1: check if adding pages to resync bio fails dm-crypt: check if adding pages to clone bio fails block: mark bio_add_page as __must_check drivers/block/drbd/drbd_bitmap.c | 4 +--- drivers/block/floppy.c | 2 +- drivers/block/zram/zram_drv.c | 2 +- drivers/md/dm-crypt.c | 9 ++++++++- drivers/md/dm-zoned-metadata.c | 6 +++--- drivers/md/md.c | 4 ++-- drivers/md/raid1-10.c | 11 ++++++----- drivers/md/raid1.c | 7 +++++-- drivers/md/raid10.c | 20 ++++++++++---------- drivers/md/raid5-cache.c | 2 +- drivers/md/raid5-ppl.c | 4 ++-- fs/btrfs/bio.c | 2 +- fs/btrfs/raid56.c | 2 +- fs/buffer.c | 2 +- fs/gfs2/ops_fstype.c | 2 +- fs/jfs/jfs_logmgr.c | 4 ++-- fs/zonefs/super.c | 2 +- include/linux/bio.h | 2 +- mm/page_io.c | 8 ++++---- 19 files changed, 52 insertions(+), 43 deletions(-) base-commit: af67688dca57999fd848f051eeea1d375ba546b2 -- 2.39.2
