---

yaml --- r: 356162 b: refs/heads/master c: 5e4bf1a h: refs/heads/master v: v3
git-mirror · Nov 22, 2012 · 6c5a2db · 6c5a2db
1 parent 3006ff4
commit 6c5a2db
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Showing 2 changed files with 7 additions and 2 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: bbee3aec3472fc2ca10b6b1020aec84567ea25ce
+refs/heads/master: 5e4bf1a55da976a5ed60901bb8801f1024ef9774
diff --git a/trunk/arch/x86/mm/pgtable.c b/trunk/arch/x86/mm/pgtable.c
@@ -328,7 +328,12 @@ int pmdp_set_access_flags(struct vm_area_struct *vma,
 	if (changed && dirty) {
 		*pmdp = entry;
 		pmd_update_defer(vma->vm_mm, address, pmdp);
-		flush_tlb_range(vma, address, address + HPAGE_PMD_SIZE);
+		/*
+		 * We had a write-protection fault here and changed the pmd
+		 * to to more permissive. No need to flush the TLB for that,
+		 * #PF is architecturally guaranteed to do that and in the
+		 * worst-case we'll generate a spurious fault.
+		 */
 	}
 
 	return changed;