From e4a1cc56e4d728eb87072c71c07581524e5160b1 Mon Sep 17 00:00:00 2001 From: Rik van Riel Date: Tue, 6 Nov 2012 09:55:18 +0000 Subject: [PATCH] x86: mm: drop TLB flush from ptep_set_access_flags Intel has an architectural guarantee that the TLB entry causing a page fault gets invalidated automatically. This means we should be able to drop the local TLB invalidation. Because of the way other areas of the page fault code work, chances are good that all x86 CPUs do this. However, if someone somewhere has an x86 CPU that does not invalidate the TLB entry causing a page fault, this one-liner should be easy to revert. Signed-off-by: Rik van Riel Cc: Linus Torvalds Cc: Andrew Morton Cc: Michel Lespinasse Cc: Peter Zijlstra Cc: Ingo Molnar --- arch/x86/mm/pgtable.c | 1 - 1 file changed, 1 deletion(-) diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c index be3bb4690887..7353de3d98a7 100644 --- a/arch/x86/mm/pgtable.c +++ b/arch/x86/mm/pgtable.c @@ -317,7 +317,6 @@ int ptep_set_access_flags(struct vm_area_struct *vma, if (changed && dirty) { *ptep = entry; pte_update_defer(vma->vm_mm, address, ptep); - __flush_tlb_one(address); } return changed; -- GitLab