linux-kernel - [tip:x86/urgent] x86/uv: Fix uv_gpa_to_soc_phys

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Date:	Thu, 26 Jan 2012 05:37:10 -0800
From:	tip-bot for Russ Anderson <rja@....com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, rja@....com, hpa@...or.com,
	mingo@...hat.com, stable@...nel.org, tglx@...utronix.de,
	mingo@...e.hu
Subject: [tip:x86/urgent] x86/uv: Fix uv_gpa_to_soc_phys_ram() shift

Commit-ID:  5a51467b146ab7948d2f6812892eac120a30529c
Gitweb:     http://git.kernel.org/tip/5a51467b146ab7948d2f6812892eac120a30529c
Author:     Russ Anderson <rja@....com>
AuthorDate: Wed, 18 Jan 2012 20:07:54 -0600
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Thu, 26 Jan 2012 10:58:27 +0100

x86/uv: Fix uv_gpa_to_soc_phys_ram() shift

uv_gpa_to_soc_phys_ram() was inadvertently ignoring the
shift values.  This fix takes the shift into account.

Signed-off-by: Russ Anderson <rja@....com>
Cc: <stable@...nel.org>
Link: http://lkml.kernel.org/r/20120119020753.GA7228@sgi.com
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 arch/x86/include/asm/uv/uv_hub.h |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/uv/uv_hub.h b/arch/x86/include/asm/uv/uv_hub.h
index 54a13aa..21f7385 100644
--- a/arch/x86/include/asm/uv/uv_hub.h
+++ b/arch/x86/include/asm/uv/uv_hub.h
@@ -318,13 +318,13 @@ uv_gpa_in_mmr_space(unsigned long gpa)
 /* UV global physical address --> socket phys RAM */
 static inline unsigned long uv_gpa_to_soc_phys_ram(unsigned long gpa)
 {
-	unsigned long paddr = gpa & uv_hub_info->gpa_mask;
+	unsigned long paddr;
 	unsigned long remap_base = uv_hub_info->lowmem_remap_base;
 	unsigned long remap_top =  uv_hub_info->lowmem_remap_top;
 
 	gpa = ((gpa << uv_hub_info->m_shift) >> uv_hub_info->m_shift) |
 		((gpa >> uv_hub_info->n_lshift) << uv_hub_info->m_val);
-	gpa = gpa & uv_hub_info->gpa_mask;
+	paddr = gpa & uv_hub_info->gpa_mask;
 	if (paddr >= remap_base && paddr < remap_base + remap_top)
 		paddr -= remap_base;
 	return paddr;
--
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