Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=1c6b2ca5e0939bf8b5d1a11f1646f25189ecd447
Commit: 1c6b2ca5e0939bf8b5d1a11f1646f25189ecd447
Parent: 0349337467dc6039dcfb225074944ae944e7b34e
Author: Paul Mundt <[EMAIL PROTECTED]>
AuthorDate: Mon Nov 19 13:00:32 2007 +0900
Committer: Paul Mundt <[EMAIL PROTECTED]>
CommitDate: Mon Nov 19 13:00:32 2007 +0900
sh: Kill off UTLB flush in fast-path.
The __do_page_fault() fast-path contains a UTLB flush in order to
force an ITLB reload, this isn't needed in practice as the ITLB is
auto-reloaded from the UTLB anyways, which is already displaced by
the manual 'ldtlb' in the update_mmu_cache() path.
This provides a measurable speed up in the TLB miss fast-path.
Signed-off-by: Paul Mundt <[EMAIL PROTECTED]>
---
arch/sh/mm/fault.c | 8 --------
1 files changed, 0 insertions(+), 8 deletions(-)
diff --git a/arch/sh/mm/fault.c b/arch/sh/mm/fault.c
index f33cedb..c56a5fa 100644
--- a/arch/sh/mm/fault.c
+++ b/arch/sh/mm/fault.c
@@ -304,14 +304,6 @@ asmlinkage int __kprobes __do_page_fault(struct pt_regs
*regs,
entry = pte_mkdirty(entry);
entry = pte_mkyoung(entry);
-#ifdef CONFIG_CPU_SH4
- /*
- * 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);
ret = 0;
-
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