[PATCH] uml: make 64-bit COW files compatible with 32-bit ones
This is the minimal fix to make 64-bit UML binaries create 32-bit
compatible COW files and read them.
I've indeed tested that current code doesn't do this - the code gets
SIGFPE for a division by a value read at the wrong place, where 0 is
found.
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/cow_user.c b/arch/um/drivers/cow_user.c
index 0ec4052..6ab852b 100644
--- a/arch/um/drivers/cow_user.c
+++ b/arch/um/drivers/cow_user.c
@@ -100,7 +100,7 @@
__u32 alignment;
__u32 cow_format;
char backing_file[PATH_LEN_V3];
-};
+} __attribute__((packed));
/* COW format definitions - for now, we have only the usual COW bitmap */
#define COW_BITMAP 0