From: "Kirill A. Shutemov" Subject: [PATCHv4 21/43] thp: introduce hpage_size() and hpage_mask() Date: Tue, 25 Oct 2016 03:13:20 +0300 Message-ID: <20161025001342.76126-22-kirill.shutemov@linux.intel.com> References: <20161025001342.76126-1-kirill.shutemov@linux.intel.com> Cc: Alexander Viro , Hugh Dickins , Andrea Arcangeli , Dave Hansen , Vlastimil Babka , Matthew Wilcox , Ross Zwisler , linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-block@vger.kernel.org, "Kirill A. Shutemov" To: "Theodore Ts'o" , Andreas Dilger , Jan Kara , Andrew Morton Return-path: In-Reply-To: <20161025001342.76126-1-kirill.shutemov@linux.intel.com> Sender: owner-linux-mm@kvack.org List-Id: linux-ext4.vger.kernel.org Introduce new helpers which return size/mask of the page: HPAGE_PMD_SIZE/HPAGE_PMD_MASK if the page is PageTransHuge() and PAGE_SIZE/PAGE_MASK otherwise. Signed-off-by: Kirill A. Shutemov --- include/linux/huge_mm.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h index 9b9f65d99873..42934769f256 100644 --- a/include/linux/huge_mm.h +++ b/include/linux/huge_mm.h @@ -142,6 +142,20 @@ static inline int hpage_nr_pages(struct page *page) return 1; } +static inline int hpage_size(struct page *page) +{ + if (unlikely(PageTransHuge(page))) + return HPAGE_PMD_SIZE; + return PAGE_SIZE; +} + +static inline unsigned long hpage_mask(struct page *page) +{ + if (unlikely(PageTransHuge(page))) + return HPAGE_PMD_MASK; + return PAGE_MASK; +} + extern int do_huge_pmd_numa_page(struct fault_env *fe, pmd_t orig_pmd); extern struct page *huge_zero_page; @@ -167,6 +181,8 @@ void mm_put_huge_zero_page(struct mm_struct *mm); #define HPAGE_PMD_SIZE ({ BUILD_BUG(); 0; }) #define hpage_nr_pages(x) 1 +#define hpage_size(x) PAGE_SIZE +#define hpage_mask(x) PAGE_MASK #define transparent_hugepage_enabled(__vma) 0 -- 2.9.3 -- 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