From: =?UTF-8?q?Rados=C5=82aw=20Smogura?= Subject: [WIP 12/18] Additional macros for pmd operations Date: Thu, 16 Feb 2012 15:47:51 +0100 Message-ID: <1329403677-25629-2-git-send-email-mail@smogura.eu> References: <1329403677-25629-1-git-send-email-mail@smogura.eu> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Cc: Yongqiang Yang , mail@smogura.eu, linux-ext4@vger.kernel.org To: linux-mm@kvack.org Return-path: In-Reply-To: <1329403677-25629-1-git-send-email-mail@smogura.eu> Sender: owner-linux-mm@kvack.org List-Id: linux-ext4.vger.kernel.org Macros for operating on pmd in simillar way like for pte. Signed-off-by: Rados=C5=82aw Smogura --- arch/x86/include/asm/pgtable.h | 21 +++++++++++++++++++++ 1 files changed, 21 insertions(+), 0 deletions(-) diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtabl= e.h index 49afb3f..38fd008 100644 --- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -265,6 +265,11 @@ static inline pmd_t pmd_wrprotect(pmd_t pmd) return pmd_clear_flags(pmd, _PAGE_RW); } =20 +static inline int pmd_dirty(pmd_t pmd) +{ + return pmd_flags(pmd) & _PAGE_DIRTY; +} + static inline pmd_t pmd_mkdirty(pmd_t pmd) { return pmd_set_flags(pmd, _PAGE_DIRTY); @@ -285,6 +290,11 @@ static inline pmd_t pmd_mkwrite(pmd_t pmd) return pmd_set_flags(pmd, _PAGE_RW); } =20 +static inline pmd_t pmd_writeprotect(pmd_t pmd) +{ + return pmd_clear_flags(pmd, _PAGE_RW); +} + static inline pmd_t pmd_mknotpresent(pmd_t pmd) { return pmd_clear_flags(pmd, _PAGE_PRESENT); @@ -731,6 +741,17 @@ static inline int pmd_write(pmd_t pmd) return pmd_flags(pmd) & _PAGE_RW; } =20 +#define __HAVE_ARCH_PMD_EXEC +static inline int pmd_exec(pmd_t pmd) +{ + return !(pmd_flags(pmd) & _PAGE_NX); +} + +static inline void pmd_mkexec(pmd_t pmd) +{ + pmd_clear_flags(pmd, _PAGE_NX); +} + #define __HAVE_ARCH_PMDP_GET_AND_CLEAR static inline pmd_t pmdp_get_and_clear(struct mm_struct *mm, unsigned lo= ng addr, pmd_t *pmdp) --=20 1.7.3.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter= .ca/ Don't email: email@kvack.org