From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qg0-f53.google.com (mail-qg0-f53.google.com [209.85.192.53]) by kanga.kvack.org (Postfix) with ESMTP id 2D36382966 for ; Thu, 21 May 2015 15:34:09 -0400 (EDT) Received: by qgfa63 with SMTP id a63so27671384qgf.0 for ; Thu, 21 May 2015 12:34:09 -0700 (PDT) Received: from mail-qg0-x22f.google.com (mail-qg0-x22f.google.com. [2607:f8b0:400d:c04::22f]) by mx.google.com with ESMTPS id d69si17609286qhc.129.2015.05.21.12.34.07 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 21 May 2015 12:34:08 -0700 (PDT) Received: by qget53 with SMTP id t53so47121362qge.3 for ; Thu, 21 May 2015 12:34:07 -0700 (PDT) From: j.glisse@gmail.com Subject: [PATCH 15/36] memcg: export get_mem_cgroup_from_mm() Date: Thu, 21 May 2015 15:31:24 -0400 Message-Id: <1432236705-4209-16-git-send-email-j.glisse@gmail.com> In-Reply-To: <1432236705-4209-1-git-send-email-j.glisse@gmail.com> References: <1432236705-4209-1-git-send-email-j.glisse@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: owner-linux-mm@kvack.org List-ID: To: akpm@linux-foundation.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Linus Torvalds , joro@8bytes.org, Mel Gorman , "H. Peter Anvin" , Peter Zijlstra , Andrea Arcangeli , Johannes Weiner , Larry Woodman , Rik van Riel , Dave Airlie , Brendan Conoboy , Joe Donohue , Duncan Poole , Sherry Cheung , Subhash Gutti , John Hubbard , Mark Hairgrove , Lucien Dunning , Cameron Buschardt , Arvind Gopalakrishnan , Haggai Eran , Shachar Raindel , Liran Liss , Roland Dreier , Ben Sander , Greg Stoner , John Bridgman , Michael Mantor , Paul Blinzer , Laurent Morichetti , Alexander Deucher , Oded Gabbay , =?UTF-8?q?J=C3=A9r=C3=B4me=20Glisse?= From: JA(C)rA'me Glisse Usefull for HMM when trying to uncharge freshly allocated anonymous pages after error inside migration memory migration path. Signed-off-by: JA(C)rA'me Glisse --- include/linux/memcontrol.h | 7 +++++++ mm/memcontrol.c | 3 ++- 2 files changed, 9 insertions(+), 1 deletion(-) diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 6c89181..488748e 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -93,6 +93,7 @@ bool task_in_mem_cgroup(struct task_struct *task, struct mem_cgroup *memcg); extern struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page); extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); +extern struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm); extern struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg); extern struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css); @@ -275,6 +276,12 @@ static inline struct cgroup_subsys_state return NULL; } + +static inline struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) +{ + return NULL; +} + static inline struct mem_cgroup * mem_cgroup_iter(struct mem_cgroup *root, struct mem_cgroup *prev, diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 14c2f20..360d9e0 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -966,7 +966,7 @@ struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p) return mem_cgroup_from_css(task_css(p, memory_cgrp_id)); } -static struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) +struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) { struct mem_cgroup *memcg = NULL; @@ -988,6 +988,7 @@ static struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) rcu_read_unlock(); return memcg; } +EXPORT_SYMBOL(get_mem_cgroup_from_mm); /** * mem_cgroup_iter - iterate over memory cgroup hierarchy -- 1.9.3 -- 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