diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/iov_iter.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/lib/iov_iter.c b/lib/iov_iter.c index 6c597cdfcf5b..e55357f09f71 100644 --- a/lib/iov_iter.c +++ b/lib/iov_iter.c @@ -1065,6 +1065,21 @@ static void pipe_advance(struct iov_iter *i, size_t size) pipe_truncate(i); } +static void iov_iter_bvec_advance(struct iov_iter *i, size_t size) +{ + struct bvec_iter bi; + + bi.bi_size = i->count; + bi.bi_bvec_done = i->iov_offset; + bi.bi_idx = 0; + bvec_iter_advance(i->bvec, &bi, size); + + i->bvec += bi.bi_idx; + i->nr_segs -= bi.bi_idx; + i->count = bi.bi_size; + i->iov_offset = bi.bi_bvec_done; +} + void iov_iter_advance(struct iov_iter *i, size_t size) { if (unlikely(iov_iter_is_pipe(i))) { @@ -1075,6 +1090,10 @@ void iov_iter_advance(struct iov_iter *i, size_t size) i->count -= size; return; } + if (iov_iter_is_bvec(i)) { + iov_iter_bvec_advance(i, size); + return; + } iterate_and_advance(i, size, v, 0, 0, 0) } EXPORT_SYMBOL(iov_iter_advance); |