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authorCatalin Marinas <catalin.marinas@arm.com>2014-03-12 20:28:09 +0400
committerCatalin Marinas <catalin.marinas@arm.com>2014-03-13 15:22:29 +0400
commit71fdb6bf61bf0692f004f9daf5650392c0cfe300 (patch)
tree9a3f7110c06475f49c97d766f7d0c32f7de6135e /arch/arm64/include
parentde2db7432917a82b62d55bb59635586eeca6d1bd (diff)
downloadlinux-71fdb6bf61bf0692f004f9daf5650392c0cfe300.tar.xz
arm64: Do not synchronise I and D caches for special ptes
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@arm.com> Reported-by: Steve Capper <Steve.Capper@arm.com> Tested-by: Laura Abbott <lauraa@codeaurora.org> Tested-by: Bharat Bhushan <Bharat.Bhushan@freescale.com> Cc: <stable@vger.kernel.org>
Diffstat (limited to 'arch/arm64/include')
-rw-r--r--arch/arm64/include/asm/pgtable.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index 2d3cede62709..72c9ac38cdd9 100644
--- 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_struct *mm, unsigned long addr,
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;