From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pb0-f46.google.com (mail-pb0-f46.google.com [209.85.160.46]) by kanga.kvack.org (Postfix) with ESMTP id 4B73A6B003B for ; Wed, 2 Oct 2013 16:18:07 -0400 (EDT) Received: by mail-pb0-f46.google.com with SMTP id rq2so1399447pbb.33 for ; Wed, 02 Oct 2013 13:18:06 -0700 (PDT) From: Davidlohr Bueso Subject: [PATCH 1/2] mm,fs: introduce helpers around i_mmap_mutex Date: Wed, 2 Oct 2013 13:17:45 -0700 Message-Id: <1380745066-9925-2-git-send-email-davidlohr@hp.com> In-Reply-To: <1380745066-9925-1-git-send-email-davidlohr@hp.com> References: <1380745066-9925-1-git-send-email-davidlohr@hp.com> Sender: owner-linux-mm@kvack.org List-ID: To: Ingo Molnar , Andrew Morton Cc: Peter Zijlstra , aswin@hp.com, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, Davidlohr Bueso Various parts of the kernel acquire and release this mutex, so add i_mmap_lock_write() and immap_unlock_write() helper functions that will encapsulate this logic. The next patch will make use of these. Signed-off-by: Davidlohr Bueso --- include/linux/fs.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/include/linux/fs.h b/include/linux/fs.h index 3f40547..b32e64f 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -478,6 +478,16 @@ struct block_device { int mapping_tagged(struct address_space *mapping, int tag); +static inline void i_mmap_lock_write(struct address_space *mapping) +{ + mutex_lock(&mapping->i_mmap_mutex); +} + +static inline void i_mmap_unlock_write(struct address_space *mapping) +{ + mutex_unlock(&mapping->i_mmap_mutex); +} + /* * Might pages of this file be mapped into userspace? */ -- 1.8.1.4 -- 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/ . Don't email: email@kvack.org