The patch titled
paravirt: remove read hazard from cow
has been removed from the -mm tree. Its filename is
paravirt-remove-read-hazard-from-cow.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: paravirt: remove read hazard from cow
From: Zachary Amsden <zach@xxxxxxxxxx>
We don't want to read PTEs directly like this after they have been modified,
as a lazy MMU implementation of direct page tables may not have written the
updated PTE back to memory yet.
Signed-off-by: Zachary Amsden <zach@xxxxxxxxxx>
Signed-off-by: Jeremy Fitzhardinge <jeremy@xxxxxxxxxxxxx>
Cc: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
mm/memory.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/memory.c~paravirt-remove-read-hazard-from-cow mm/memory.c
--- a/mm/memory.c~paravirt-remove-read-hazard-from-cow
+++ a/mm/memory.c
@@ -467,7 +467,7 @@ copy_one_pte(struct mm_struct *dst_mm, s
*/
if (is_cow_mapping(vm_flags)) {
ptep_set_wrprotect(src_mm, addr, src_pte);
- pte = *src_pte;
+ pte = pte_wrprotect(pte);
}
/*
_
Patches currently in -mm which might be from zach@xxxxxxxxxx are
origin.patch
x86-remove-default_ldt-and-simplify-ldt-setting.patch
-
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