From: Eric Biggers <[email protected]> _submit_bh() allowed submitting a buffer_head for I/O using custom bio_flags. It used to be used by jbd to set BIO_SNAP_STABLE, introduced by commit 713685111774 ("mm: make snapshotting pages for stable writes a per-bio operation"). However, the code and flag has since been removed and no _submit_bh() users remain.
These days, bio_flags are mostly used internally by the block layer to track the state of bio's. As such, it doesn't really make sense for filesystems to use them instead of op_flags when wanting special behavior for block requests. Therefore, remove _submit_bh() and trim the bio_flags argument from submit_bh_wbc(). Cc: Darrick J. Wong <[email protected]> Signed-off-by: Eric Biggers <[email protected]> --- fs/buffer.c | 19 +++++-------------- include/linux/buffer_head.h | 2 -- 2 files changed, 5 insertions(+), 16 deletions(-) diff --git a/fs/buffer.c b/fs/buffer.c index 9196f2a270da..68dc05ce06a5 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -49,7 +49,6 @@ 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, - unsigned long bio_flags, struct writeback_control *wbc); #define BH_ENTRY(list) list_entry((list), struct buffer_head, b_assoc_buffers) @@ -1830,7 +1829,7 @@ int __block_write_full_page(struct inode *inode, struct page *page, do { struct buffer_head *next = bh->b_this_page; if (buffer_async_write(bh)) { - submit_bh_wbc(REQ_OP_WRITE, write_flags, bh, 0, wbc); + submit_bh_wbc(REQ_OP_WRITE, write_flags, bh, wbc); nr_underway++; } bh = next; @@ -1884,7 +1883,7 @@ int __block_write_full_page(struct inode *inode, struct page *page, struct buffer_head *next = bh->b_this_page; if (buffer_async_write(bh)) { clear_buffer_dirty(bh); - submit_bh_wbc(REQ_OP_WRITE, write_flags, bh, 0, wbc); + submit_bh_wbc(REQ_OP_WRITE, write_flags, bh, wbc); nr_underway++; } bh = next; @@ -3095,7 +3094,7 @@ void guard_bio_eod(int op, struct bio *bio) } static int submit_bh_wbc(int op, int op_flags, struct buffer_head *bh, - unsigned long bio_flags, struct writeback_control *wbc) + struct writeback_control *wbc) { struct bio *bio; @@ -3130,7 +3129,6 @@ static int submit_bh_wbc(int op, int op_flags, struct buffer_head *bh, bio->bi_end_io = end_bio_bh_io_sync; bio->bi_private = bh; - bio->bi_flags |= bio_flags; /* Take care of bh's that straddle the end of the device */ guard_bio_eod(op, bio); @@ -3145,16 +3143,9 @@ static int submit_bh_wbc(int op, int op_flags, struct buffer_head *bh, return 0; } -int _submit_bh(int op, int op_flags, struct buffer_head *bh, - unsigned long bio_flags) +int submit_bh(int op, int op_flags, struct buffer_head *bh) { - return submit_bh_wbc(op, op_flags, bh, bio_flags, NULL); -} -EXPORT_SYMBOL_GPL(_submit_bh); - -int submit_bh(int op, int op_flags, struct buffer_head *bh) -{ - return submit_bh_wbc(op, op_flags, bh, 0, NULL); + return 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 79591c3660cc..bd029e52ef5e 100644 --- a/include/linux/buffer_head.h +++ b/include/linux/buffer_head.h @@ -196,8 +196,6 @@ 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 op, int op_flags, struct buffer_head *bh, - unsigned long bio_flags); int submit_bh(int, int, struct buffer_head *); void write_boundary_block(struct block_device *bdev, sector_t bblock, unsigned blocksize); -- 2.12.1
