From: Oleg Nesterov <oleg@redhat.com>
Date: Wed, 10 Dec 2014 23:54:42 +0000 (-0800)
Subject: usermodehelper: kill the kmod_thread_locker logic
X-Git-Tag: omap-for-v3.19/fixes-rc1~142^2~16
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7f6def9f9b6ebba42fcdc12cfb3092f2cf44b3fe;p=pandora-kernel.git

usermodehelper: kill the kmod_thread_locker logic

Now that we do not call kernel_thread(CLONE_VFORK) from the worker
thread we can not deadlock if do_execve() in turn triggers another
call_usermodehelper(), we can remove the kmod_thread_locker code.

Note: we should probably kill khelper_wq and simply use one of the
global workqueues, say, system_unbound_wq, this special wq for umh buys
nothing nowadays.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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