| From | Greg Kroah-Hartman <> | Subject | [PATCH 3.14 001/158] arm64: Do not synchronise I and D caches for special ptes | Date | Sun, 4 May 2014 11:38:30 -0400 |
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3.14-stable review patch. If anyone has any objections, please let me know.
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From: Catalin Marinas <catalin.marinas@arm.com>
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@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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- 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;
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