From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx149.postini.com [74.125.245.149]) by kanga.kvack.org (Postfix) with SMTP id B462E6B00AA for ; Mon, 16 Sep 2013 07:25:57 -0400 (EDT) From: "Kirill A. Shutemov" Subject: [PATCHv2 3/9] mm: introduce api for split page table lock for PMD level Date: Mon, 16 Sep 2013 14:25:34 +0300 Message-Id: <1379330740-5602-4-git-send-email-kirill.shutemov@linux.intel.com> In-Reply-To: <1379330740-5602-1-git-send-email-kirill.shutemov@linux.intel.com> References: <1379330740-5602-1-git-send-email-kirill.shutemov@linux.intel.com> Sender: owner-linux-mm@kvack.org List-ID: To: Alex Thorlton , Ingo Molnar , Andrew Morton , Naoya Horiguchi Cc: "Eric W . Biederman" , "Paul E . McKenney" , Al Viro , Andi Kleen , Andrea Arcangeli , Dave Hansen , Dave Jones , David Howells , Frederic Weisbecker , Johannes Weiner , Kees Cook , Mel Gorman , Michael Kerrisk , Oleg Nesterov , Peter Zijlstra , Rik van Riel , Robin Holt , Sedat Dilek , Srikar Dronamraju , Thomas Gleixner , linux-kernel@vger.kernel.org, linux-mm@kvack.org, "Kirill A. Shutemov" Basic api, backed by mm->page_table_lock for now. Actual implementation will be added later. Signed-off-by: Naoya Horiguchi Signed-off-by: Kirill A. Shutemov --- include/linux/mm.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/include/linux/mm.h b/include/linux/mm.h index 6cf8ddb..e3481c6 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1294,6 +1294,19 @@ static inline void pgtable_page_dtor(struct page *page) ((unlikely(pmd_none(*(pmd))) && __pte_alloc_kernel(pmd, address))? \ NULL: pte_offset_kernel(pmd, address)) +static inline spinlock_t *pmd_lockptr(struct mm_struct *mm, pmd_t *pmd) +{ + return &mm->page_table_lock; +} + + +static inline spinlock_t *pmd_lock(struct mm_struct *mm, pmd_t *pmd) +{ + spinlock_t *ptl = pmd_lockptr(mm, pmd); + spin_lock(ptl); + return ptl; +} + extern void free_area_init(unsigned long * zones_size); extern void free_area_init_node(int nid, unsigned long * zones_size, unsigned long zone_start_pfn, unsigned long *zholes_size); -- 1.8.4.rc3 -- 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/ . Don't email: email@kvack.org