diff options
| author | Christoph Hellwig <hch@lst.de> | 2019-06-26 16:49:28 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-06-29 18:47:32 +0300 |
| commit | b620743077e291ae7d0debd21f50413a8c266229 (patch) | |
| tree | 965cefe7b283e821cc9f288e9ded8ba0778f6a60 /include/linux/uio.h | |
| parent | d7c8aa85ed204ccebf0c18f29b941d52b33deae3 (diff) | |
| download | linux-b620743077e291ae7d0debd21f50413a8c266229.tar.xz | |
block: never take page references for ITER_BVEC
If we pass pages through an iov_iter we always already have a reference
in the caller. Thus remove the ITER_BVEC_FLAG_NO_REF and don't take
reference to pages by default for bvec backed iov_iters.
Reviewed-by: Minwoo Im <minwoo.im.dev@gmail.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/uio.h')
| -rw-r--r-- | include/linux/uio.h | 10 |
1 files changed, 1 insertions, 9 deletions
diff --git a/include/linux/uio.h b/include/linux/uio.h index 2c90a0842ee8..cea1761c5672 100644 --- a/include/linux/uio.h +++ b/include/linux/uio.h @@ -19,9 +19,6 @@ struct kvec { }; enum iter_type { - /* set if ITER_BVEC doesn't hold a bv_page ref */ - ITER_BVEC_FLAG_NO_REF = 2, - /* iter types */ ITER_IOVEC = 4, ITER_KVEC = 8, @@ -56,7 +53,7 @@ struct iov_iter { static inline enum iter_type iov_iter_type(const struct iov_iter *i) { - return i->type & ~(READ | WRITE | ITER_BVEC_FLAG_NO_REF); + return i->type & ~(READ | WRITE); } static inline bool iter_is_iovec(const struct iov_iter *i) @@ -89,11 +86,6 @@ static inline unsigned char iov_iter_rw(const struct iov_iter *i) return i->type & (READ | WRITE); } -static inline bool iov_iter_bvec_no_ref(const struct iov_iter *i) -{ - return (i->type & ITER_BVEC_FLAG_NO_REF) != 0; -} - /* * Total number of bytes covered by an iovec. * |