linux-kernel - [PATCH RESEND 3/3] memcg: kill start_kernel()->mm_init_owner(&init

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20140428151947.GA20757@redhat.com>
Date:	Mon, 28 Apr 2014 17:19:47 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Balbir Singh <bsingharora@...il.com>,
	Johannes Weiner <hannes@...xchg.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Michal Hocko <mhocko@...e.cz>,
	Peter Chiang <pchiang@...dia.com>, linux-kernel@...r.kernel.org
Subject: [PATCH RESEND 3/3] memcg: kill
	start_kernel()->mm_init_owner(&init_mm)

Remove start_kernel()->mm_init_owner(&init_mm, &init_task).

This doesn't really hurt but unnecessary and misleading. init_task
is the "swapper" thread == current, its ->mm is always NULL. And
init_mm can only be used as ->active_mm, not as ->mm.

mm_init_owner() has a single caller with this patch, perhaps it
should die. mm_init() can initialize ->owner under #ifdef.

Signed-off-by: Oleg Nesterov <oleg@...hat.com>
Reviewed-by: Michal Hocko <mhocko@...e.cz>
---
 init/main.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)

diff --git a/init/main.c b/init/main.c
index 3815895..17090bb 100644
--- a/init/main.c
+++ b/init/main.c
@@ -507,7 +507,6 @@ asmlinkage void __init start_kernel(void)
 	page_address_init();
 	pr_notice("%s", linux_banner);
 	setup_arch(&command_line);
-	mm_init_owner(&init_mm, &init_task);
 	mm_init_cpumask(&init_mm);
 	setup_command_line(command_line);
 	setup_nr_cpu_ids();
-- 
1.5.5.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/