From mboxrd@z Thu Jan 1 00:00:00 1970 From: js07.lee@gmail.com (Jungseung Lee) Date: Tue, 21 Oct 2014 20:00:36 +0900 Subject: [PATCH 1/2] arm: Introduce {set,clear}_pte_bit Message-ID: <1413889237-6933-1-git-send-email-js07.lee@gmail.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Introduce helper functions for pte_mk* functions and it would be used to change individual bits in ptes at times. Signed-off-by: Jungseung Lee --- arch/arm/include/asm/pgtable.h | 62 ++++++++++++++++++++++++++++++++++-------- 1 file changed, 51 insertions(+), 11 deletions(-) diff --git a/arch/arm/include/asm/pgtable.h b/arch/arm/include/asm/pgtable.h index 3b30062..d5cac54 100644 --- a/arch/arm/include/asm/pgtable.h +++ b/arch/arm/include/asm/pgtable.h @@ -252,17 +252,57 @@ static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, set_pte_ext(ptep, pteval, ext); } -#define PTE_BIT_FUNC(fn,op) \ -static inline pte_t pte_##fn(pte_t pte) { pte_val(pte) op; return pte; } - -PTE_BIT_FUNC(wrprotect, |= L_PTE_RDONLY); -PTE_BIT_FUNC(mkwrite, &= ~L_PTE_RDONLY); -PTE_BIT_FUNC(mkclean, &= ~L_PTE_DIRTY); -PTE_BIT_FUNC(mkdirty, |= L_PTE_DIRTY); -PTE_BIT_FUNC(mkold, &= ~L_PTE_YOUNG); -PTE_BIT_FUNC(mkyoung, |= L_PTE_YOUNG); -PTE_BIT_FUNC(mkexec, &= ~L_PTE_XN); -PTE_BIT_FUNC(mknexec, |= L_PTE_XN); +static inline pte_t clear_pte_bit(pte_t pte, pgprot_t prot) +{ + pte_val(pte) &= ~pgprot_val(prot); + return pte; +} + +static inline pte_t set_pte_bit(pte_t pte, pgprot_t prot) +{ + pte_val(pte) |= pgprot_val(prot); + return pte; +} + +static inline pte_t pte_wrprotect(pte_t pte) +{ + return set_pte_bit(pte, __pgprot(L_PTE_RDONLY)); +} + +static inline pte_t pte_mkwrite(pte_t pte) +{ + return clear_pte_bit(pte, __pgprot(L_PTE_RDONLY)); +} + +static inline pte_t pte_mkclean(pte_t pte) +{ + return clear_pte_bit(pte, __pgprot(L_PTE_DIRTY)); +} + +static inline pte_t pte_mkdirty(pte_t pte) +{ + return set_pte_bit(pte, __pgprot(L_PTE_DIRTY)); +} + +static inline pte_t pte_mkold(pte_t pte) +{ + return clear_pte_bit(pte, __pgprot(L_PTE_YOUNG)); +} + +static inline pte_t pte_mkyoung(pte_t pte) +{ + return set_pte_bit(pte, __pgprot(L_PTE_YOUNG)); +} + +static inline pte_t pte_mkexec(pte_t pte) +{ + return clear_pte_bit(pte, __pgprot(L_PTE_XN)); +} + +static inline pte_t pte_mknexec(pte_t pte) +{ + return set_pte_bit(pte, __pgprot(L_PTE_XN)); +} static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) { -- 1.9.1