From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Kirill A. Shutemov" Subject: [PATCHv3, RFC 02/34] block: implement add_bdi_stat() Date: Fri, 5 Apr 2013 14:59:26 +0300 Message-ID: <1365163198-29726-3-git-send-email-kirill.shutemov@linux.intel.com> References: <1365163198-29726-1-git-send-email-kirill.shutemov@linux.intel.com> Cc: Al Viro , Hugh Dickins , Wu Fengguang , Jan Kara , Mel Gorman , linux-mm@kvack.org, Andi Kleen , Matthew Wilcox , "Kirill A. Shutemov" , Hillf Danton , Dave Hansen , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" To: Andrea Arcangeli , Andrew Morton Return-path: In-Reply-To: <1365163198-29726-1-git-send-email-kirill.shutemov@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-fsdevel.vger.kernel.org From: "Kirill A. Shutemov" We're going to add/remove a number of page cache entries at once. This patch implements add_bdi_stat() which adjusts bdi stats by arbitrary amount. It's required for batched page cache manipulations. Signed-off-by: Kirill A. Shutemov --- include/linux/backing-dev.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h index 3504599..b05d961 100644 --- a/include/linux/backing-dev.h +++ b/include/linux/backing-dev.h @@ -167,6 +167,16 @@ static inline void __dec_bdi_stat(struct backing_dev_info *bdi, __add_bdi_stat(bdi, item, -1); } +static inline void add_bdi_stat(struct backing_dev_info *bdi, + enum bdi_stat_item item, s64 amount) +{ + unsigned long flags; + + local_irq_save(flags); + __add_bdi_stat(bdi, item, amount); + local_irq_restore(flags); +} + static inline void dec_bdi_stat(struct backing_dev_info *bdi, enum bdi_stat_item item) { -- 1.7.10.4