From 59acc08fd95aefb5430458a08a82b15a4174ed74 Mon Sep 17 00:00:00 2001 From: "Antonino A. Daplas" Date: Thu, 2 Aug 2007 18:16:46 +0800 Subject: [PATCH] [x86 setup] video setup: Fix VBE DDC reading Add memory operand constraint and write-only modifier to the inline assembly to effect the writing of the EDID block to boot_params.edid_info. Without this, gcc would think the EDID query was dead code and would eliminate it. Signed-off-by: Antonino Daplas Signed-off-by: H. Peter Anvin --- arch/i386/boot/video-vesa.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/i386/boot/video-vesa.c b/arch/i386/boot/video-vesa.c index e6aa9eb8d9..f1bc71e948 100644 --- a/arch/i386/boot/video-vesa.c +++ b/arch/i386/boot/video-vesa.c @@ -268,7 +268,7 @@ void vesa_store_edid(void) dx = 0; /* EDID block number */ di =(size_t) &boot_params.edid_info; /* (ES:)Pointer to block */ asm(INT10 - : "+a" (ax), "+b" (bx), "+d" (dx) + : "+a" (ax), "+b" (bx), "+d" (dx), "=m" (boot_params.edid_info) : "c" (cx), "D" (di) : "esi"); #endif /* CONFIG_FIRMWARE_EDID */ -- 2.39.5