This is a note to let you know that I've just added the patch titled
arm64: Do not synchronise I and D caches for special ptes
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm64-do-not-synchronise-i-and-d-caches-for-special-ptes.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 71fdb6bf61bf0692f004f9daf5650392c0cfe300 Mon Sep 17 00:00:00 2001
From: Catalin Marinas <catalin.marinas@xxxxxxx>
Date: Wed, 12 Mar 2014 16:28:09 +0000
Subject: arm64: Do not synchronise I and D caches for special ptes
From: Catalin Marinas <catalin.marinas@xxxxxxx>
commit 71fdb6bf61bf0692f004f9daf5650392c0cfe300 upstream.
Special pte mappings are not intended to be executable and do not even
have an associated struct page. This patch ensures that we do not call
__sync_icache_dcache() on such ptes.
Signed-off-by: Catalin Marinas <catalin.marinas@xxxxxxx>
Reported-by: Steve Capper <Steve.Capper@xxxxxxx>
Tested-by: Laura Abbott <lauraa@xxxxxxxxxxxxxx>
Tested-by: Bharat Bhushan <Bharat.Bhushan@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm64/include/asm/pgtable.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -199,7 +199,7 @@ static inline void set_pte_at(struct mm_
pte_t *ptep, pte_t pte)
{
if (pte_valid_user(pte)) {
- if (pte_exec(pte))
+ if (!pte_special(pte) && pte_exec(pte))
__sync_icache_dcache(pte, addr);
if (pte_dirty(pte) && pte_write(pte))
pte_val(pte) &= ~PTE_RDONLY;
Patches currently in stable-queue which might be from catalin.marinas@xxxxxxx are
queue-3.14/arm64-make-dma-coherent-and-strongly-ordered-mappings-not-executable.patch
queue-3.14/arm64-do-not-synchronise-i-and-d-caches-for-special-ptes.patch
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