[PATCH] Turn do_sync_file_range() into do_sync_mapping_range()
do_sync_file_range() accepts a file * from which it takes an address_space to
sync. Abstract out the bulk of the function into do_sync_mapping_range()
which takes the address_space directly. This way callers who want to sync an
address_space directly can take advantage of the functionality provided.
do_sync_file_range() is preserved as a small wrapper around
do_sync_mapping_range().
Ocfs2 in particular would like to use this to initiate a sync of a specific
inode range during truncate, where a file * may not be available.
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
diff --git a/fs/sync.c b/fs/sync.c
index d0feff6..5cb9e7e 100644
--- a/fs/sync.c
+++ b/fs/sync.c
@@ -239,13 +239,11 @@
/*
* `endbyte' is inclusive
*/
-int do_sync_file_range(struct file *file, loff_t offset, loff_t endbyte,
- unsigned int flags)
+int do_sync_mapping_range(struct address_space *mapping, loff_t offset,
+ loff_t endbyte, unsigned int flags)
{
int ret;
- struct address_space *mapping;
- mapping = file->f_mapping;
if (!mapping) {
ret = -EINVAL;
goto out;
@@ -275,4 +273,4 @@
out:
return ret;
}
-EXPORT_SYMBOL_GPL(do_sync_file_range);
+EXPORT_SYMBOL_GPL(do_sync_mapping_range);
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 86ec3f4..095a9c9 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -843,8 +843,13 @@
extern int fcntl_getlease(struct file *filp);
/* fs/sync.c */
-extern int do_sync_file_range(struct file *file, loff_t offset, loff_t endbyte,
- unsigned int flags);
+extern int do_sync_mapping_range(struct address_space *mapping, loff_t offset,
+ loff_t endbyte, unsigned int flags);
+static inline int do_sync_file_range(struct file *file, loff_t offset,
+ loff_t endbyte, unsigned int flags)
+{
+ return do_sync_mapping_range(file->f_mapping, offset, endbyte, flags);
+}
/* fs/locks.c */
extern void locks_init_lock(struct file_lock *);
