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authorAkinobu Mita <akinobu.mita@gmail.com>2014-10-09 15:26:55 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-10-09 22:25:53 -0400
commit4db96b71e3caea5bb39053d57683129e0682c66f (patch)
treeed8deca97f1b2beb3f73a79a8112d8819fd2df2c /fs/buffer.c
parent59d43914ed7b96255271ad6b7b735344beffa3c0 (diff)
downloadop-kernel-dev-4db96b71e3caea5bb39053d57683129e0682c66f.zip
op-kernel-dev-4db96b71e3caea5bb39053d57683129e0682c66f.tar.gz
vfs: guard end of device for mpage interface
Add guard_bio_eod() check for mpage code in order to allow 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. Using mpage_readpages() for block device requires this guard check. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/buffer.c')
-rw-r--r--fs/buffer.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/buffer.c b/fs/buffer.c
index e442a26..7bd5c46 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -2966,7 +2966,7 @@ static void end_bio_bh_io_sync(struct bio *bio, int err)
* errors, this only handles the "we need to be able to
* do IO at the final sector" case.
*/
-static void guard_bio_eod(int rw, struct bio *bio)
+void guard_bio_eod(int rw, struct bio *bio)
{
sector_t maxsector;
struct bio_vec *bvec = &bio->bi_io_vec[bio->bi_vcnt - 1];
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