diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/buffer.c | 43 | ||||
| -rw-r--r-- | fs/internal.h | 1 |
2 files changed, 0 insertions, 44 deletions
diff --git a/fs/buffer.c b/fs/buffer.c index b8d28370cfd7..3f5758e01e40 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -3019,49 +3019,6 @@ static void end_bio_bh_io_sync(struct bio *bio) bio_put(bio); } -/* - * This allows us to do IO even on the odd last sectors - * of a device, even if the block size is some multiple - * of the physical sector size. - * - * We'll just truncate the bio to the size of the device, - * and clear the end of the buffer head manually. - * - * Truly out-of-range accesses will turn into actual IO - * errors, this only handles the "we need to be able to - * do IO at the final sector" case. - */ -void guard_bio_eod(struct bio *bio) -{ - sector_t maxsector; - struct hd_struct *part; - - rcu_read_lock(); - part = __disk_get_part(bio->bi_disk, bio->bi_partno); - if (part) - maxsector = part_nr_sects_read(part); - else - maxsector = get_capacity(bio->bi_disk); - rcu_read_unlock(); - - if (!maxsector) - return; - - /* - * If the *whole* IO is past the end of the device, - * let it through, and the IO layer will turn it into - * an EIO. - */ - if (unlikely(bio->bi_iter.bi_sector >= maxsector)) - return; - - maxsector -= bio->bi_iter.bi_sector; - if (likely((bio->bi_iter.bi_size >> 9) <= maxsector)) - return; - - bio_truncate(bio, maxsector << 9); -} - static int submit_bh_wbc(int op, int op_flags, struct buffer_head *bh, enum rw_hint write_hint, struct writeback_control *wbc) { diff --git a/fs/internal.h b/fs/internal.h index f3f280b952a3..4d37912a5587 100644 --- a/fs/internal.h +++ b/fs/internal.h @@ -38,7 +38,6 @@ static inline int __sync_blockdev(struct block_device *bdev, int wait) /* * buffer.c */ -extern void guard_bio_eod(struct bio *bio); extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len, get_block_t *get_block, struct iomap *iomap); |