To avoid needing to check if a given user backed iov_iter is of type ITER_IOVEC or ITER_UBUF, set the number of segments for the ITER_UBUF case to 1 as we're carrying a single segment. Signed-off-by: Jens Axboe <axboe@xxxxxxxxx> --- include/linux/uio.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/include/linux/uio.h b/include/linux/uio.h index 192831775d2b..953ccba94164 100644 --- a/include/linux/uio.h +++ b/include/linux/uio.h @@ -390,7 +390,8 @@ static inline void iov_iter_ubuf(struct iov_iter *i, unsigned int direction, .user_backed = true, .data_source = direction, .ubuf = buf, - .count = count + .count = count, + .nr_segs = 1 }; } /* Flags for iov_iter_get/extract_pages*() */ -- 2.39.2
