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[x86 setup] video setup: Fix VBE DDC reading
authorAntonino A. Daplas <adaplas@gmail.com>
Thu, 2 Aug 2007 10:16:46 +0000 (18:16 +0800)
committerH. Peter Anvin <hpa@zytor.com>
Thu, 2 Aug 2007 15:08:27 +0000 (11:08 -0400)
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>

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