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authorLinus Torvalds <torvalds@linux-foundation.org>2014-06-12 10:30:18 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-06-12 10:30:18 -0700
commit16b9057804c02e2d351e9c8f606e909b43cbd9e7 (patch)
treea3ac6e1d9d57a8abf4267e5ead3f2de1309335eb /mm/page_io.c
parent5c02c392cd2320e8d612376d6b72b6548a680923 (diff)
parentc2338f2dc7c1e9f6202f370c64ffd7f44f3d4b51 (diff)
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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs updates from Al Viro: "This the bunch that sat in -next + lock_parent() fix. This is the minimal set; there's more pending stuff. In particular, I really hope to get acct.c fixes merged this cycle - we need that to deal sanely with delayed-mntput stuff. In the next pile, hopefully - that series is fairly short and localized (kernel/acct.c, fs/super.c and fs/namespace.c). In this pile: more iov_iter work. Most of prereqs for ->splice_write with sane locking order are there and Kent's dio rewrite would also fit nicely on top of this pile" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (70 commits) lock_parent: don't step on stale ->d_parent of all-but-freed one kill generic_file_splice_write() ceph: switch to iter_file_splice_write() shmem: switch to iter_file_splice_write() nfs: switch to iter_splice_write_file() fs/splice.c: remove unneeded exports ocfs2: switch to iter_file_splice_write() ->splice_write() via ->write_iter() bio_vec-backed iov_iter optimize copy_page_{to,from}_iter() bury generic_file_aio_{read,write} lustre: get rid of messing with iovecs ceph: switch to ->write_iter() ceph_sync_direct_write: stop poking into iov_iter guts ceph_sync_read: stop poking into iov_iter guts new helper: copy_page_from_iter() fuse: switch to ->write_iter() btrfs: switch to ->write_iter() ocfs2: switch to ->write_iter() xfs: switch to ->write_iter() ...
Diffstat (limited to 'mm/page_io.c')
-rw-r--r--mm/page_io.c21
1 files changed, 14 insertions, 7 deletions
diff --git a/mm/page_io.c b/mm/page_io.c
index 58b50d2901fe..243a9b76e5ce 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -264,9 +264,17 @@ int __swap_writepage(struct page *page, struct writeback_control *wbc,
struct kiocb kiocb;
struct file *swap_file = sis->swap_file;
struct address_space *mapping = swap_file->f_mapping;
- struct iovec iov = {
- .iov_base = kmap(page),
- .iov_len = PAGE_SIZE,
+ struct bio_vec bv = {
+ .bv_page = page,
+ .bv_len = PAGE_SIZE,
+ .bv_offset = 0
+ };
+ struct iov_iter from = {
+ .type = ITER_BVEC | WRITE,
+ .count = PAGE_SIZE,
+ .iov_offset = 0,
+ .nr_segs = 1,
+ .bvec = &bv
};
init_sync_kiocb(&kiocb, swap_file);
@@ -275,10 +283,9 @@ int __swap_writepage(struct page *page, struct writeback_control *wbc,
set_page_writeback(page);
unlock_page(page);
- ret = mapping->a_ops->direct_IO(KERNEL_WRITE,
- &kiocb, &iov,
- kiocb.ki_pos, 1);
- kunmap(page);
+ ret = mapping->a_ops->direct_IO(ITER_BVEC | WRITE,
+ &kiocb, &from,
+ kiocb.ki_pos);
if (ret == PAGE_SIZE) {
count_vm_event(PSWPOUT);
ret = 0;