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author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-12-18 03:44:00 +0100 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-12-18 03:44:00 +0100 |
commit | 0110c350c86d511be2130cb2a30dcbb76c4af750 (patch) | |
tree | d343a9e0fcb586a7110b13d411b314d33d404c08 /fs/9p | |
parent | Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile (diff) | |
parent | Merge branch 'work.autofs' into for-linus (diff) | |
download | linux-0110c350c86d511be2130cb2a30dcbb76c4af750.tar.xz linux-0110c350c86d511be2130cb2a30dcbb76c4af750.zip |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull more vfs updates from Al Viro:
"In this pile:
- autofs-namespace series
- dedupe stuff
- more struct path constification"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (40 commits)
ocfs2: implement the VFS clone_range, copy_range, and dedupe_range features
ocfs2: charge quota for reflinked blocks
ocfs2: fix bad pointer cast
ocfs2: always unlock when completing dio writes
ocfs2: don't eat io errors during _dio_end_io_write
ocfs2: budget for extent tree splits when adding refcount flag
ocfs2: prohibit refcounted swapfiles
ocfs2: add newlines to some error messages
ocfs2: convert inode refcount test to a helper
simple_write_end(): don't zero in short copy into uptodate
exofs: don't mess with simple_write_{begin,end}
9p: saner ->write_end() on failing copy into non-uptodate page
fix gfs2_stuffed_write_end() on short copies
fix ceph_write_end()
nfs_write_end(): fix handling of short copies
vfs: refactor clone/dedupe_file_range common functions
fs: try to clone files first in vfs_copy_file_range
vfs: misc struct path constification
namespace.c: constify struct path passed to a bunch of primitives
quota: constify struct path in quota_on
...
Diffstat (limited to 'fs/9p')
-rw-r--r-- | fs/9p/vfs_addr.c | 15 |
1 files changed, 4 insertions, 11 deletions
diff --git a/fs/9p/vfs_addr.c b/fs/9p/vfs_addr.c index 5ca1fb0043f6..adaf6f6dd858 100644 --- a/fs/9p/vfs_addr.c +++ b/fs/9p/vfs_addr.c @@ -310,18 +310,10 @@ static int v9fs_write_end(struct file *filp, struct address_space *mapping, p9_debug(P9_DEBUG_VFS, "filp %p, mapping %p\n", filp, mapping); - if (unlikely(copied < len)) { - /* - * zero out the rest of the area - */ - unsigned from = pos & (PAGE_SIZE - 1); - - zero_user(page, from + copied, len - copied); - flush_dcache_page(page); + if (unlikely(copied < len && !PageUptodate(page))) { + copied = 0; + goto out; } - - if (!PageUptodate(page)) - SetPageUptodate(page); /* * No need to use i_size_read() here, the i_size * cannot change under us because we hold the i_mutex. @@ -331,6 +323,7 @@ static int v9fs_write_end(struct file *filp, struct address_space *mapping, i_size_write(inode, last_pos); } set_page_dirty(page); +out: unlock_page(page); put_page(page); |