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authorAl Viro <viro@zeniv.linux.org.uk>2014-03-03 22:03:20 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2014-05-06 17:32:42 -0400
commitf8579f8673b7ecdb7a81d5d5bb1d981093d9aa94 (patch)
treed4287d0dffbf3758e709238302fb8865cdd66651 /mm
parente7c24607b5d68a4cdc56e09d70a3c8bae5f0519f (diff)
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generic_file_direct_write(): switch to iov_iter
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'mm')
-rw-r--r--mm/filemap.c15
1 files changed, 7 insertions, 8 deletions
diff --git a/mm/filemap.c b/mm/filemap.c
index 000a220e2a41..a840890ed39f 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2385,9 +2385,8 @@ int pagecache_write_end(struct file *file, struct address_space *mapping,
EXPORT_SYMBOL(pagecache_write_end);
ssize_t
-generic_file_direct_write(struct kiocb *iocb, const struct iovec *iov,
- unsigned long *nr_segs, loff_t pos,
- size_t count, size_t ocount)
+generic_file_direct_write(struct kiocb *iocb, struct iov_iter *from,
+ loff_t pos, size_t count, size_t ocount)
{
struct file *file = iocb->ki_filp;
struct address_space *mapping = file->f_mapping;
@@ -2397,9 +2396,9 @@ generic_file_direct_write(struct kiocb *iocb, const struct iovec *iov,
pgoff_t end;
if (count != ocount)
- *nr_segs = iov_shorten((struct iovec *)iov, *nr_segs, count);
+ from->nr_segs = iov_shorten((struct iovec *)from->iov, from->nr_segs, count);
- write_len = iov_length(iov, *nr_segs);
+ write_len = iov_length(from->iov, from->nr_segs);
end = (pos + write_len - 1) >> PAGE_CACHE_SHIFT;
written = filemap_write_and_wait_range(mapping, pos, pos + write_len - 1);
@@ -2426,7 +2425,7 @@ generic_file_direct_write(struct kiocb *iocb, const struct iovec *iov,
}
}
- written = mapping->a_ops->direct_IO(WRITE, iocb, iov, pos, *nr_segs);
+ written = mapping->a_ops->direct_IO(WRITE, iocb, from->iov, pos, from->nr_segs);
/*
* Finally, try again to invalidate clean pages which might have been
@@ -2443,6 +2442,7 @@ generic_file_direct_write(struct kiocb *iocb, const struct iovec *iov,
if (written > 0) {
pos += written;
+ iov_iter_advance(from, written);
if (pos > i_size_read(inode) && !S_ISBLK(inode->i_mode)) {
i_size_write(inode, pos);
mark_inode_dirty(inode);
@@ -2645,11 +2645,10 @@ ssize_t __generic_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
if (unlikely(file->f_flags & O_DIRECT)) {
loff_t endbyte;
- written = generic_file_direct_write(iocb, iov, &from.nr_segs, pos,
+ written = generic_file_direct_write(iocb, &from, pos,
count, ocount);
if (written < 0 || written == count)
goto out;
- iov_iter_advance(&from, written);
/*
* direct-io write to a hole: fall through to buffered I/O