linux-kernel - [PATCH] x86: Add a platform

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Message-ID: <20100324121428.27881.96956.stgit@localhost.localdomain>
Date:	Wed, 24 Mar 2010 12:14:44 +0000
From:	Alan Cox <alan@...ux.intel.com>
To:	linux-kernel@...r.kernel.org, mingo@...e.hu
Subject: [PATCH] x86: Add a platform_type helper

Various x86 drivers for embedded stuff will need to know the platform they
are running on to do runtime setup. Having them all grovelling around at
boot_params.hdr.hardware_subarch seems a bad idea, so export it as an
inline function that hides all the details of how the value arrives.

Signed-off-by: Alan Cox <alan@...ux.intel.com>
---

 arch/x86/include/asm/setup.h |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)


diff --git a/arch/x86/include/asm/setup.h b/arch/x86/include/asm/setup.h
index 86b1506..4008446 100644
--- a/arch/x86/include/asm/setup.h
+++ b/arch/x86/include/asm/setup.h
@@ -60,6 +60,12 @@ static inline void x86_mrst_early_setup(void) { }
  */
 extern struct boot_params boot_params;
 
+/* Isolate the internal knowledge from the generic callers */
+extern __inline int x86_platform_type(void)
+{
+	return boot_params.hdr.hardware_subarch;
+}
+
 /*
  * Do NOT EVER look at the BIOS memory size location.
  * It does not work on many machines.

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