tree 9674a8f8ad1ae25466700d45580d1f2562926716
parent e03ad4ee2783e41afc90cc7848468aef10741c0e
author Jens Axboe <axboe@kernel.dk> 1679690239 -0600
committer Jens Axboe <axboe@kernel.dk> 1680185549 -0600

iov_iter: import single vector iovecs as ITER_UBUF

Add a special case to __import_iovec(), which imports a single segment
iovec as an ITER_UBUF rather than an ITER_IOVEC. ITER_UBUF is cheaper
to iterate than ITER_IOVEC, and for a single segment iovec, there's no
point in using a segmented iterator.

Signed-off-by: Jens Axboe <axboe@kernel.dk>