MIPS: Use rcu to lookup a task in mipsmt_sys_sched_setaffinity()
The call simply looks up the corresponding task (without iterating the tasklist), which is safe under rcu instead of the tasklist_lock. In addition, the setaffinity counter part already does this. Signed-off-by: Davidlohr Bueso <dbueso@suse.de> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
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