um: kill thread->forking
authorAl Viro <viro@zeniv.linux.org.uk>
Thu, 20 Sep 2012 13:28:25 +0000 (09:28 -0400)
committerAl Viro <viro@zeniv.linux.org.uk>
Thu, 20 Sep 2012 14:49:09 +0000 (10:49 -0400)
we only use that to tell copy_thread() done by syscall from that
done by kernel_thread().  However, it's easier to do simply by
checking PF_KTHREAD in thread flags.

Merge sys_clone() guts for 32bit and 64bit, while we are at it...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

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