vfs: remove unused wrapper block_page_mkwrite()

The function currently called "__block_page_mkwrite()" used to be called
"block_page_mkwrite()" until a wrapper for this function was added by:

commit 24da4fab5a61 ("vfs: Create __block_page_mkwrite() helper passing
	error values back")

This wrapper, the current "block_page_mkwrite()", is currently unused.
__block_page_mkwrite() is used directly by ext4, nilfs2 and xfs.

Remove the unused wrapper, rename __block_page_mkwrite() back to
block_page_mkwrite() and update the comment above block_page_mkwrite().

Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Jan Kara <jack@suse.com>
Cc: Jan Kara <jack@suse.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 2 insertions, 22 deletions

diff --git a/fs/buffer.c b/fs/buffer.c
index 51aff0296ce2..4f4cd959da7c 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -2420,9 +2420,9 @@ EXPORT_SYMBOL(block_commit_write);
  * unlock the page.
  *
  * Direct callers of this function should protect against filesystem freezing
- * using sb_start_write() - sb_end_write() functions.
+ * using sb_start_pagefault() - sb_end_pagefault() functions.
  */
-int __block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf,
+int block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf,
                          get_block_t get_block)
 {
         struct page *page = vmf->page;
@@ -2459,26 +2459,6 @@ out_unlock:
         unlock_page(page);
         return ret;
 }
-EXPORT_SYMBOL(__block_page_mkwrite);
-
-int block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf,
-                   get_block_t get_block)
-{
-        int ret;
-        struct super_block *sb = file_inode(vma->vm_file)->i_sb;
-
-        sb_start_pagefault(sb);
-
-        /*
-         * 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);
-
-        ret = __block_page_mkwrite(vma, vmf, get_block);
-        sb_end_pagefault(sb);
-        return block_page_mkwrite_return(ret);
-}
 EXPORT_SYMBOL(block_page_mkwrite);
 
 /*