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| author | Antonino A. Daplas <adaplas@gmail.com> | 2007-08-02 14:16:46 +0400 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2007-08-02 19:08:27 +0400 |
| commit | 59acc08fd95aefb5430458a08a82b15a4174ed74 (patch) | |
| tree | 446a1712a99eb0485a60ca789c71757f6f436277 | |
| parent | 1ed4395035a6791ebbbf618429a58ab9c207cc83 (diff) | |
| download | linux-59acc08fd95aefb5430458a08a82b15a4174ed74.tar.xz | |
[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 <adaplas@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| -rw-r--r-- | arch/i386/boot/video-vesa.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/i386/boot/video-vesa.c b/arch/i386/boot/video-vesa.c index e6aa9eb8d93a..f1bc71e948cf 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 */ |