diff options
| author | Keith Busch <kbusch@kernel.org> | 2022-06-10 12:58:27 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-06-27 06:29:11 -0600 |
| commit | cfa320f72882f0e944e2237287db84b0f7df877d (patch) | |
| tree | 4f98bfdc889216c8e68f4c1a1ce0b5a489f87654 /include/linux/uio.h | |
| parent | 9cfe3ddecdc556ab1d1693b29e8a26ba80953ccc (diff) | |
iov: introduce iov_iter_aligned
The existing iov_iter_alignment() function returns the logical OR of
address and length. For cases where address and length need to be
considered separately, introduce a helper function that a caller can
specificy length and address masks that indicate if the iov is
unaligned.
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220610195830.3574005-9-kbusch@fb.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/uio.h')
| -rw-r--r-- | include/linux/uio.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/uio.h b/include/linux/uio.h index 739285fe5a2f..34ba4a731179 100644 --- a/include/linux/uio.h +++ b/include/linux/uio.h @@ -219,6 +219,8 @@ size_t _copy_mc_to_iter(const void *addr, size_t bytes, struct iov_iter *i); #endif size_t iov_iter_zero(size_t bytes, struct iov_iter *); +bool iov_iter_is_aligned(const struct iov_iter *i, unsigned addr_mask, + unsigned len_mask); unsigned long iov_iter_alignment(const struct iov_iter *i); unsigned long iov_iter_gap_alignment(const struct iov_iter *i); void iov_iter_init(struct iov_iter *i, unsigned int direction, const struct iovec *iov, |