fs: move inode_dio_wait calls into ->setattr

Let filesystems handle waiting for direct I/O requests themselves instead
of doing it beforehand.  This means filesystem-specific locks to prevent
new dio referenes from appearing can be held.  This is important to allow
generalizing i_dio_count to non-DIO_LOCKING filesystems.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 3 insertions, 0 deletions

diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index 4fd5bb33dbb5..dcf543d8caf1 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -3114,6 +3114,9 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
                         error = -EFBIG;
                         goto out;
                 }
+
+                inode_dio_wait(inode);
+
                 /* fill in hole pointers in the expanding truncate case. */
                 if (attr->ia_size > inode->i_size) {
                         error = generic_cont_expand_simple(inode, attr->ia_size);