kmod: avoid propagating PF_NO_SETAFFINITY into userspace child

[zhang . yi20]

The kernel worker thread has the PF_NO_SETAFFINITY flag, and it is propagated
into the userspace child. Clearing this flag in usersapce child to enable its
migrating capability.


Signed-off-by: Zhang Yi <zhang.yi20@xxxxxxxxxx>

--- linux3-12/kernel/kmod.c	2013-11-14 09:06:58.991781656 +0000
+++ linux3-12/kernel/kmod.c	2013-11-14 09:08:47.511781621 +0000
@@ -217,6 +217,7 @@ static int ____call_usermodehelper(void
 	 * Avoid propagating that into the userspace child.
 	 */
 	set_user_nice(current, 0);
+	current->flags &= ~PF_NO_SETAFFINITY;

 	retval = -ENOMEM;
 	new = prepare_kernel_cred(current);

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