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, 2 insertions, 0 deletions

diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index 788e09a07f7e..06e7c767ab35 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -1184,6 +1184,8 @@ static int ext2_setsize(struct inode *inode, loff_t newsize)
         if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
                 return -EPERM;
 
+        inode_dio_wait(inode);
+
         if (mapping_is_xip(inode->i_mapping))
                 error = xip_truncate_page(inode->i_mapping, newsize);
         else if (test_opt(inode->i_sb, NOBH))