[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>
diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index 54d2473..e104f59 100644
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c
@@ -150,8 +150,9 @@
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 ubd {
+ /* name (and fd, below) of the file opened for writing, either the
+ * backing or the cow file. */
char *file;
int count;
int fd;