generic/2.6.28: update yaffs code

SVN-Revision: 15390

target/linux/generic-2.6/patches-2.6.28/512-yaffs-2.6.28.1-fix.patch

@@ -1,11 +1,11 @@
 --- a/fs/yaffs2/yaffs_fs.c
 +++ b/fs/yaffs2/yaffs_fs.c
-@@ -745,7 +745,7 @@ static int yaffs_write_begin(struct file
-         
- 	T(YAFFS_TRACE_OS, (KERN_DEBUG "start yaffs_write_begin\n"));
+@@ -746,7 +746,7 @@ static int yaffs_write_begin(struct file
+ 
+ 	T(YAFFS_TRACE_OS, ("start yaffs_write_begin\n"));
  	/* Get a page */
--	pg = __grab_cache_page(mapping,index);
-+	pg = grab_cache_page_write_begin(mapping, index, flags);
- 	*pagep = pg;	
- 	if(!pg){
- 		ret =  -ENOMEM;
+-#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28)
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
+ 	pg = grab_cache_page_write_begin(mapping, index, flags);
+ #else
+ 	pg = __grab_cache_page(mapping, index);