s390: fold kernel_thread_helper() into ret_from_fork()

... and don't bother with syscall return path in case of kernel
threads.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-09-10 18:03:41 -04:00
commit 37fe5d41f6
3 changed files with 28 additions and 16 deletions