From 2a9d32f682b2b4928dcd4680bc99e98a3d096816 Mon Sep 17 00:00:00 2001
From: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Date: Mon, 30 Oct 2006 22:07:04 -0800
Subject: [PATCH] [PATCH] uml ubd driver: document some struct fields

Add documentation about some fields in struct ubd, whose meaning is
non-obvious due to struct names (should change names altogether, I agree).

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
 arch/um/drivers/ubd_kern.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index 54d24738280e3..e104f59ec519b 100644
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c
@@ -150,8 +150,9 @@ static struct gendisk *fake_gendisk[MAX_DEV];
 static struct openflags global_openflags = OPEN_FLAGS;
 
 struct cow {
-	/* This is the backing file, actually */
+	/* backing file name */
 	char *file;
+	/* backing file fd */
 	int fd;
 	unsigned long *bitmap;
 	unsigned long bitmap_len;
@@ -160,6 +161,8 @@ struct cow {
 };
 
 struct ubd {
+	/* name (and fd, below) of the file opened for writing, either the
+	 * backing or the cow file. */
 	char *file;
 	int count;
 	int fd;
-- 
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