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authorHideo Saito <saito@densan.co.jp>2008-02-14 14:45:08 +0900
committerPaul Mundt <lethal@linux-sh.org>2008-02-14 14:45:08 +0900
commita602cc05f8fc849023e72e2857bd842f0104f648 (patch)
tree347a49a0339b867c73e9d2c6b8644966841e7c6d /arch/sh/mm
parent123100cf4fff3e8ffa375df2c74c7f2cb29ab17a (diff)
downloadop-kernel-dev-a602cc05f8fc849023e72e2857bd842f0104f648.zip
op-kernel-dev-a602cc05f8fc849023e72e2857bd842f0104f648.tar.gz
sh: Fix multiple UTLB hit on UP SH-4.
This acts as a reversion of 1c6b2ca5e0939bf8b5d1a11f1646f25189ecd447 in the case of UP SH-4, where we still have the risk of a multiple hit between the slow and fast paths. As seen on SH7780. Signed-off-by: Hideo Saito <saito@densan.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/mm')
-rw-r--r--arch/sh/mm/fault_32.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/sh/mm/fault_32.c b/arch/sh/mm/fault_32.c
index 4ef0a1f..d1fa275 100644
--- a/arch/sh/mm/fault_32.c
+++ b/arch/sh/mm/fault_32.c
@@ -299,6 +299,14 @@ asmlinkage int __kprobes __do_page_fault(struct pt_regs *regs,
entry = pte_mkdirty(entry);
entry = pte_mkyoung(entry);
+#if defined(CONFIG_CPU_SH4) && !defined(CONFIG_SMP)
+ /*
+ * ITLB is not affected by "ldtlb" instruction.
+ * So, we need to flush the entry by ourselves.
+ */
+ local_flush_tlb_one(get_asid(), address & PAGE_MASK);
+#endif
+
set_pte(pte, entry);
update_mmu_cache(NULL, address, entry);
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