fs: Push file_update_time() into __block_page_mkwrite()

Tested-by: Kamal Mostafa <kamal@canonical.com>
Tested-by: Peter M. Petrakis <peter.petrakis@canonical.com>
Tested-by: Dann Frazier <dann.frazier@canonical.com>
Tested-by: Massimo Morana <massimo.morana@canonical.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 6 insertions, 0 deletions

diff --git a/fs/buffer.c b/fs/buffer.c
index c7062c896d7c..d5ec360e332d 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -2318,6 +2318,12 @@ int __block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf,
         loff_t size;
         int ret;
 
+        /*
+         * Update file times before taking page lock. We may end up failing the
+         * fault so this update may be superfluous but who really cares...
+         */
+        file_update_time(vma->vm_file);
+
         lock_page(page);
         size = i_size_read(inode);
         if ((page->mapping != inode->i_mapping) ||