Remove last traces of ->sync_page

Commit 7eaceaccab5f removed ->sync_page, but a few mentions of it still
existed in documentation and comments,

Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 2 insertions, 9 deletions

diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index 75eea7ce3d7c..08086dc160d3 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -179,7 +179,6 @@ unlocks and drops the reference.
 prototypes:
         int (*writepage)(struct page *page, struct writeback_control *wbc);
         int (*readpage)(struct file *, struct page *);
-        int (*sync_page)(struct page *);
         int (*writepages)(struct address_space *, struct writeback_control *);
         int (*set_page_dirty)(struct page *page);
         int (*readpages)(struct file *filp, struct address_space *mapping,
@@ -208,7 +207,6 @@ locking rules:
                         PageLocked(page)        i_mutex
 writepage:              yes, unlocks (see below)
 readpage:               yes, unlocks
-sync_page:              maybe
 writepages:
 set_page_dirty          no
 readpages:
@@ -226,8 +224,8 @@ error_remove_page:	yes
 swap_activate:          no
 swap_deactivate:        no
 
-        ->write_begin(), ->write_end(), ->sync_page() and ->readpage()
-may be called from the request handler (/dev/loop).
+        ->write_begin(), ->write_end() and ->readpage() may be called from
+the request handler (/dev/loop).
 
         ->readpage() unlocks the page, either synchronously or via I/O
 completion.
@@ -283,11 +281,6 @@ will leave the page itself marked clean but it will be tagged as dirty in the
 radix tree.  This incoherency can lead to all sorts of hard-to-debug problems
 in the filesystem like having dirty inodes at umount and losing written data.
 
-        ->sync_page() locking rules are not well-defined - usually it is called
-with lock on page, but that is not guaranteed. Considering the currently
-existing instances of this method ->sync_page() itself doesn't look
-well-defined...
-
         ->writepages() is used for periodic writeback and for syscall-initiated
 sync operations.  The address_space should start I/O against at least
 *nr_to_write pages.  *nr_to_write must be decremented for each page which is