From mboxrd@z Thu Jan 1 00:00:00 1970 From: Davidlohr Bueso Subject: [PATCH 01/10] mm,fs: introduce helpers around the i_mmap_mutex Date: Thu, 30 Oct 2014 12:34:08 -0700 Message-ID: <1414697657-1678-2-git-send-email-dave@stgolabs.net> References: <1414697657-1678-1-git-send-email-dave@stgolabs.net> Return-path: In-Reply-To: <1414697657-1678-1-git-send-email-dave@stgolabs.net> Sender: linux-kernel-owner@vger.kernel.org To: akpm@linux-foundation.org Cc: hughd@google.com, riel@redhat.com, mgorman@suse.de, peterz@infradead.org, mingo@kernel.org, linux-kernel@vger.kernel.org, dbueso@suse.de, linux-mm@kvack.org, Davidlohr Bueso List-Id: linux-mm.kvack.org 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 Reviewed-by: Rik van Riel Acked-by: Kirill A. Shutemov --- include/linux/fs.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/include/linux/fs.h b/include/linux/fs.h index 09d4480..f3a2372 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -467,6 +467,16 @@ 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? */ -- 1.8.4.5