[x86 setup] EDD: add missing =m constraint

Add a missing =m constraint to the EDD-probing code, that could have
caused improper dead-code elimination.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/i386/boot/edd.c b/arch/i386/boot/edd.c
index 77d92daf7923..658834d9f92a 100644
--- a/arch/i386/boot/edd.c
+++ b/arch/i386/boot/edd.c
@@ -127,7 +127,7 @@ static int get_edd_info(u8 devno, struct edd_info *ei)
         ax = 0x4800;
         dx = devno;
         asm("pushfl; int $0x13; popfl"
-            : "+a" (ax), "+d" (dx)
+            : "+a" (ax), "+d" (dx), "=m" (ei->params)
             : "S" (&ei->params)
             : "ebx", "ecx", "edi");