Change all the usages of file->f_mapping in ext3_*write_end() functions to use
the mapping argument directly.  This has two consequences:

 (*) Consistency.  Without this patch sometimes one is used and sometimes the
     other is.

 (*) A NULL file pointer can be passed.  This feature is then made use of by
     the generic hook in the next patch, which is used by CacheFiles to write
     pages to a file without setting up a file struct.

Signed-off-by: David Howells <dhowells@redhat.com>
---

 fs/ext3/inode.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)


diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index eb95670..c976123 100644
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -1215,7 +1215,7 @@ static int ext3_generic_write_end(struct file *file,
 				loff_t pos, unsigned len, unsigned copied,
 				struct page *page, void *fsdata)
 {
-	struct inode *inode = file->f_mapping->host;
+	struct inode *inode = mapping->host;
 
 	copied = block_write_end(file, mapping, pos, len, copied, page, fsdata);
 
@@ -1240,7 +1240,7 @@ static int ext3_ordered_write_end(struct file *file,
 				struct page *page, void *fsdata)
 {
 	handle_t *handle = ext3_journal_current_handle();
-	struct inode *inode = file->f_mapping->host;
+	struct inode *inode = mapping->host;
 	unsigned from, to;
 	int ret = 0, ret2;
 
@@ -1281,7 +1281,7 @@ static int ext3_writeback_write_end(struct file *file,
 				struct page *page, void *fsdata)
 {
 	handle_t *handle = ext3_journal_current_handle();
-	struct inode *inode = file->f_mapping->host;
+	struct inode *inode = mapping->host;
 	int ret = 0, ret2;
 	loff_t new_i_size;
 

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