From: Peter Zijlstra <peterz@infradead.org> Date: Thu, 22 Dec 2011 20:16:39 +0100
> ARM being the last user of that feature, and with only SPARC64 and IA64 > (needlessly) using __ARCH_WANT_UNLOCKED_CTXSW we could finally remove > some of that hairy code from the core scheduler.