bio_vec-backed iov_iter

New variant of iov_iter - ITER_BVEC in iter->type, backed with
bio_vec array instead of iovec one.  Primitives taught to deal
with such beasts, __swap_write() switched to using that kind
of iov_iter.

Note that bio_vec is just a <page, offset, length> triple - there's
nothing block-specific about it.  I've left the definition where it
was, but took it from under ifdef CONFIG_BLOCK.

Next target: ->splice_write()...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 7fbc803cf51d..b2dae9d1437c 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -1288,7 +1288,7 @@ static int fuse_get_user_pages(struct fuse_req *req, struct iov_iter *ii,
         size_t nbytes = 0;  /* # bytes already packed in req */
 
         /* Special case for kernel I/O: can copy directly into the buffer */
-        if (ii->type & REQ_KERNEL) {
+        if (ii->type & ITER_KVEC) {
                 unsigned long user_addr = fuse_get_user_addr(ii);
                 size_t frag_size = fuse_get_frag_size(ii, *nbytesp);