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iov_iter: set nr_segs = 1 for ITER_UBUF

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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@kernel.dk>
This commit is contained in:
Jens Axboe
2023-03-28 14:29:03 -06:00
parent 6eb203e1a8
commit cd0bd57a9d
1 changed files with 2 additions and 1 deletions
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3
include/linux/uio.h
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@@ -355,7 +355,8 @@ 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*() */