[Fedora kexec-tools 1/7] kexec: x86: struct x86_linux_param_header should be packed

[Vivek Goyal]

I think struct x86_linux_param_header should be packed. Strange that we
did not do it so far.

Without packing struct size was 3824 (decimal) on my x86_64 machine. With
packing it is 3820. I think there was a padding of 4 bytes at the end. So
it should be harmless.

I tried to introduce more fields and that introduced padding in the
middle of structure and kexec stopped working and that's how I got to
know that bootparam is not packed.

Signed-off-by: Vivek Goyal <vgoyal at redhat.com>
---
 include/x86/x86-linux.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/x86/x86-linux.h b/include/x86/x86-linux.h
index 0949dc2..5f8f4b6 100644
--- a/include/x86/x86-linux.h
+++ b/include/x86/x86-linux.h
@@ -198,7 +198,7 @@ struct x86_linux_param_header {
 	struct 	edd_info eddbuf[EDDMAXNR];	/* 0xd00 */
 						/* 0xeec */
 #define COMMAND_LINE_SIZE 2048
-};
+} __attribute__ ((packed));
 
 struct x86_linux_faked_param_header {
 	struct x86_linux_param_header hdr;	/* 0x00 */
-- 
1.8.3.1