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| author | Catalin Marinas <catalin.marinas@arm.com> | 2014-03-12 16:28:09 +0000 |
|---|---|---|
| committer | Chanho Park <chanho61.park@samsung.com> | 2014-04-16 21:36:49 +0900 |
| commit | a492503aecbdb05de78a697013645aa1d58c9f89 (patch) | |
| tree | 27bc3a22f7cf218afb3c952fdba78b24c514677e | |
| parent | 6183a40e137f8f104acd5527ccd6658044e710d8 (diff) | |
| download | linux-3.10-a492503aecbdb05de78a697013645aa1d58c9f89.tar.gz linux-3.10-a492503aecbdb05de78a697013645aa1d58c9f89.tar.bz2 linux-3.10-a492503aecbdb05de78a697013645aa1d58c9f89.zip | |
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>
| -rw-r--r-- | arch/arm64/include/asm/pgtable.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index 2d3cede6270..72c9ac38cdd 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; |