From: Paul Mundt <lethal@linux-sh.org>
Date: Thu, 28 Dec 2006 01:54:01 +0000 (+0900)
Subject: sh: Don't set reserved _PAGE_WT bit on SH-3.
X-Git-Tag: v2.6.21-rc1~179^2~22
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=adac9570966eb2eb137209e552b258d4d1d4825b;p=linux-2.6

sh: Don't set reserved _PAGE_WT bit on SH-3.

Only SH-4 needs to set _PAGE_WT when using write-through caching,
don't attempt to set it on SH-3 where it ends up being a reserved
bit.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---

diff --git a/arch/sh/mm/tlb-flush.c b/arch/sh/mm/tlb-flush.c
index 9347534aa8..ef3e4d4778 100644
--- a/arch/sh/mm/tlb-flush.c
+++ b/arch/sh/mm/tlb-flush.c
@@ -175,7 +175,7 @@ void update_mmu_cache(struct vm_area_struct *vma,
 
 	/* Set PTEL register */
 	pteval &= _PAGE_FLAGS_HARDWARE_MASK; /* drop software flags */
-#ifdef CONFIG_SH_WRITETHROUGH
+#if defined(CONFIG_SH_WRITETHROUGH) && defined(CONFIG_CPU_SH4)
 	pteval |= _PAGE_WT;
 #endif
 	/* conveniently, we want all the software flags to be 0 anyway */