From: Oleg Nesterov <oleg@tv-sign.ru>
Date: Fri, 29 Sep 2006 09:00:24 +0000 (-0700)
Subject: [PATCH] elf_core_dump: don't take tasklist_lock
X-Git-Tag: v2.6.19-rc1~748
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=486ccb05fdbb7ca79784fdf0d07d2a86de48cf05;p=pandora-kernel.git

[PATCH] elf_core_dump: don't take tasklist_lock

do_each_thread() is rcu-safe, and all tasks which use this ->mm must sleep
in wait_for_completion(&mm->core_done) at this point, so we can use RCU
locks.

Also, remove unneeded INIT_LIST_HEAD(new) before list_add(new, head).

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

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