linux-kernel - [PATCH 4/9] x86/init: make ebda depend on PC subarch

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Message-Id: <1455887316-9223-5-git-send-email-mcgrof@kernel.org>
Date:	Fri, 19 Feb 2016 05:08:31 -0800
From:	"Luis R. Rodriguez" <mcgrof@...nel.org>
To:	bp@...en8.de
Cc:	x86@...nel.org, linux-kernel@...r.kernel.org, luto@...capital.net,
	boris.ostrovsky@...cle.com, rusty@...tcorp.com.au,
	david.vrabel@...rix.com, konrad.wilk@...cle.com,
	xen-devel@...ts.xensource.com,
	"Luis R. Rodriguez" <mcgrof@...nel.org>
Subject: [PATCH 4/9] x86/init: make ebda depend on PC subarch

This lets us remove its use of paravirt_enabled(). The
other subarchs are not needed here given that on 32-bit
there is a switch already that negates access to this
code on X86_SUBARCH_INTEL_MID, and X86_SUBARCH_CE4100.
Both lguest and Xen had paravirt_enabled so that
excludes them.

Signed-off-by: Luis R. Rodriguez <mcgrof@...nel.org>
---
 arch/x86/kernel/head.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/head.c b/arch/x86/kernel/head.c
index 992f442ca155..4e3be58a1a77 100644
--- a/arch/x86/kernel/head.c
+++ b/arch/x86/kernel/head.c
@@ -38,7 +38,7 @@ void __init reserve_ebda_region(void)
 	 * that the paravirt case can handle memory setup
 	 * correctly, without our help.
 	 */
-	if (paravirt_enabled())
+	if (boot_params.hdr.hardware_subarch != X86_SUBARCH_PC)
 		return;
 
 	/* end of low (conventional) memory */
-- 
2.7.0