From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail202.messagelabs.com (mail202.messagelabs.com [216.82.254.227]) by kanga.kvack.org (Postfix) with ESMTP id DEE086B004F for ; Thu, 4 Jun 2009 17:28:22 -0400 (EDT) From: Andi Kleen References: <200906041128.112757038@firstfloor.org> In-Reply-To: <200906041128.112757038@firstfloor.org> Subject: [PATCH] [2/15] HWPOISON: Export some rmap vma locking to outside world Message-Id: <20090604212812.D86311D028F@basil.firstfloor.org> Date: Thu, 4 Jun 2009 23:28:12 +0200 (CEST) Sender: owner-linux-mm@kvack.org To: akpm@linux-foundation.org, npiggin@suse.de, linux-kernel@vger.kernel.org, linux-mm@kvack.org, fengguang.wu@intel.com List-ID: 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 +++ linux/include/linux/rmap.h @@ -115,6 +115,12 @@ int try_to_munlock(struct page *); 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 +++ linux/mm/rmap.c @@ -191,7 +191,7 @@ void __init anon_vma_init(void) * 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 @@ out: 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, 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