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@xxxxxxxxxx>
---
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
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