linux-kernel - [PATCH v6 15/16] x86/init: disable pnpbios for X86_SUBARCH_INTEL

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Message-Id: <1460592286-300-16-git-send-email-mcgrof@kernel.org>
Date:	Wed, 13 Apr 2016 17:04:45 -0700
From:	"Luis R. Rodriguez" <mcgrof@...nel.org>
To:	bp@...en8.de, hpa@...or.com, tglx@...utronix.de, mingo@...hat.com,
	rusty@...tcorp.com.au
Cc:	x86@...nel.org, linux-kernel@...r.kernel.org, luto@...capital.net,
	boris.ostrovsky@...cle.com, jgross@...e.com,
	david.vrabel@...rix.com, konrad.wilk@...cle.com,
	xen-devel@...ts.xensource.com, lguest@...ts.ozlabs.org,
	andriy.shevchenko@...ux.intel.com, jlee@...e.com, glin@...e.com,
	matt@...eblueprint.co.uk, andrew.cooper3@...rix.com,
	rjw@...ysocki.net, lenb@...nel.org, robert.moore@...el.com,
	lv.zheng@...el.com, toshi.kani@...com, linux-acpi@...r.kernel.org,
	kozerkov@...allels.com, josh@...htriplett.org,
	bigeasy@...utronix.de, ffainelli@...ebox.fr,
	george.dunlap@...rix.com, julien.grall@...aro.org,
	mbizon@...ebox.fr, tiwai@...e.de,
	"Luis R. Rodriguez" <mcgrof@...nel.org>
Subject: [PATCH v6 15/16] x86/init: disable pnpbios for X86_SUBARCH_INTEL_MID

As per hpa Intel MID platforms can also disable pnpbios [0].

As per 0-day, this bumps the vmlinux size using i386-tinyconfig as
follows:

TOTAL   TEXT   init.text   x86_early_init_platform_quirks()
-8      -8     -8          -8

[0] http://lkml.kernel.org/r/5702B5C2.7070101@zytor.com

v6: add 0-day size impact

Suggested-by: H. Peter Anvin <hpa@...or.com>
Signed-off-by: Luis R. Rodriguez <mcgrof@...nel.org>
---
 arch/x86/kernel/platform-quirks.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/arch/x86/kernel/platform-quirks.c b/arch/x86/kernel/platform-quirks.c
index ab643825a7aa..853919484340 100644
--- a/arch/x86/kernel/platform-quirks.c
+++ b/arch/x86/kernel/platform-quirks.c
@@ -16,10 +16,8 @@ void __init x86_early_init_platform_quirks(void)
 		break;
 	case X86_SUBARCH_XEN:
 	case X86_SUBARCH_LGUEST:
-		x86_platform.legacy.devices.pnpbios = 0;
-		x86_platform.legacy.rtc = 0;
-		break;
 	case X86_SUBARCH_INTEL_MID:
+		x86_platform.legacy.devices.pnpbios = 0;
 		x86_platform.legacy.rtc = 0;
 		break;
 	}
-- 
2.7.2