Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754895AbZFCSqx (ORCPT ); Wed, 3 Jun 2009 14:46:53 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754428AbZFCSqm (ORCPT ); Wed, 3 Jun 2009 14:46:42 -0400 Received: from one.firstfloor.org ([213.235.205.2]:37810 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754779AbZFCSql (ORCPT ); Wed, 3 Jun 2009 14:46:41 -0400 From: Andi Kleen References: <20090603846.816684333@firstfloor.org> In-Reply-To: <20090603846.816684333@firstfloor.org> To: akpm@linux-foundation.org, npiggin@suse.de, linux-kernel@vger.kernel.org, linux-mm@kvack.org, fengguang.wu@intel.com Subject: [PATCH] [2/16] HWPOISON: Export some rmap vma locking to outside world Message-Id: <20090603184634.647601D0281@basil.firstfloor.org> Date: Wed, 3 Jun 2009 20:46:34 +0200 (CEST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2015 Lines: 58 Needed for later patch that walks rmap entries on its own. This used to be very frowned upon, but memory-failure.c does some rather specialized rmap walking and rmap has been stable for quite some time, so I think it's ok now to export it. Signed-off-by: Andi Kleen --- include/linux/rmap.h | 6 ++++++ mm/rmap.c | 4 ++-- 2 files changed, 8 insertions(+), 2 deletions(-) Index: linux/include/linux/rmap.h =================================================================== --- linux.orig/include/linux/rmap.h 2009-06-03 19:36:22.000000000 +0200 +++ linux/include/linux/rmap.h 2009-06-03 20:39:50.000000000 +0200 @@ -115,6 +115,12 @@ int page_wrprotect(struct page *page, int *odirect_sync, int count_offset); #endif +/* + * Called by memory-failure.c to kill processes. + */ +struct anon_vma *page_lock_anon_vma(struct page *page); +void page_unlock_anon_vma(struct anon_vma *anon_vma); + #else /* !CONFIG_MMU */ #define anon_vma_init() do {} while (0) Index: linux/mm/rmap.c =================================================================== --- linux.orig/mm/rmap.c 2009-06-03 19:36:22.000000000 +0200 +++ linux/mm/rmap.c 2009-06-03 20:39:50.000000000 +0200 @@ -191,7 +191,7 @@ * Getting a lock on a stable anon_vma from a page off the LRU is * tricky: page_lock_anon_vma rely on RCU to guard against the races. */ -static struct anon_vma *page_lock_anon_vma(struct page *page) +struct anon_vma *page_lock_anon_vma(struct page *page) { struct anon_vma *anon_vma; unsigned long anon_mapping; @@ -211,7 +211,7 @@ return NULL; } -static void page_unlock_anon_vma(struct anon_vma *anon_vma) +void page_unlock_anon_vma(struct anon_vma *anon_vma) { spin_unlock(&anon_vma->lock); rcu_read_unlock(); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/