The patch titled
paravirt: remove read hazard from cow
has been added to the -mm tree. Its filename is
paravirt-remove-read-hazard-from-cow.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
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>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
mm/memory.c | 2 +-
1 files 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
split-i386-and-x86_64-ptraceh.patch
uml-use-ptrace-abih-instead-of-ptraceh.patch
x86-allow-a-kernel-to-not-be-in-ring-0.patch
x86-allow-a-kernel-to-not-be-in-ring-0-tidy.patch
x86-add-a-bootparameter-to-reserve-high-linear-address-space.patch
x86-trivial-pgtableh-__assembly__-move.patch
x86-trivial-move-of-__have-macros-in-i386-pagetable-headers.patch
x86-trivial-move-of-ptep_set_access_flags.patch
x86-remove-unused-include-from-efi_stubs.patch
paravirt-remove-read-hazard-from-cow.patch
paravirt-pte-clear-not-present.patch
paravirt-lazy-mmu-mode-hooks.patch
paravirt-combine-flush-accessed-dirty.patch
paravirt-kpte-flush.patch
paravirt-optimize-ptep-establish-for-pae.patch
paravirt-remove-set-pte-atomic.patch
paravirt-pae-compile-fix.patch
paravirt-update-pte-hook.patch
-
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