[PATCH] fuse: add DESTROY operation

Add a DESTROY operation for block device based filesystems.  With the help of
this operation, such a filesystem can flush dirty data to the device
synchronously before the umount returns.

This is needed in situations where the filesystem is assumed to be clean
immediately after unmount (e.g.  ejecting removable media).

Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/linux/fuse.h b/include/linux/fuse.h
index 162a754..534744e 100644
--- a/include/linux/fuse.h
+++ b/include/linux/fuse.h
@@ -133,6 +133,7 @@
 	FUSE_CREATE        = 35,
 	FUSE_INTERRUPT     = 36,
 	FUSE_BMAP          = 37,
+	FUSE_DESTROY       = 38,
 };
 
 /* The read buffer is required to be at least 8k, but may be much larger */