cifs: Remove cifs_truncate_page() as it should be superfluous

The calls to cifs_truncate_page() should be superfluous as the places that
call it also call truncate_setsize() or cifs_setsize() and therefore
truncate_pagecache() which should also clear the tail part of the folio
containing the EOF marker.

Further, smb3_simple_falloc() calls both cifs_setsize() and
truncate_setsize() in addition to cifs_truncate_page().

Remove the superfluous calls.

This gets rid of another function referring to struct page.

[Should cifs_setsize() also set inode->i_blocks?]

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Steve French <stfrench@microsoft.com>
Reviewed-by: Paulo Alcantara (Red Hat) <pc@manguebit.com>
cc: Matthew Wilcox <willy@infradead.org>
cc: linux-cifs@vger.kernel.org
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>

1 files changed, 0 insertions, 19 deletions

diff --git a/fs/smb/client/inode.c b/fs/smb/client/inode.c
index 3bb21aa58474..a00a9d91d0da 100644
--- a/fs/smb/client/inode.c
+++ b/fs/smb/client/inode.c
@@ -2901,23 +2901,6 @@ int cifs_fiemap(struct inode *inode, struct fiemap_extent_info *fei, u64 start,
 	return -EOPNOTSUPP;
 }
 
-int cifs_truncate_page(struct address_space *mapping, loff_t from)
-{
-	pgoff_t index = from >> PAGE_SHIFT;
-	unsigned offset = from & (PAGE_SIZE - 1);
-	struct page *page;
-	int rc = 0;
-
-	page = grab_cache_page(mapping, index);
-	if (!page)
-		return -ENOMEM;
-
-	zero_user_segment(page, offset, PAGE_SIZE);
-	unlock_page(page);
-	put_page(page);
-	return rc;
-}
-
 void cifs_setsize(struct inode *inode, loff_t offset)
 {
 	struct cifsInodeInfo *cifs_i = CIFS_I(inode);
@@ -3012,8 +2995,6 @@ set_size_out:
 		 */
 		attrs->ia_ctime = attrs->ia_mtime = current_time(inode);
 		attrs->ia_valid |= ATTR_CTIME | ATTR_MTIME;
-
-		cifs_truncate_page(inode->i_mapping, inode->i_size);
 	}
 
 	return rc;