perf: Reorder & optimize perf_event_context to remove alignment padding on 64 bit builds
Remove 8 bytes of alignment padding from perf_event_context on 64 bit builds which shrinks its size to 192 bytes allowing it to fit into one fewer cache lines and into a smaller slab. Signed-off-by: NRichard Kennedy <richard@rsk.demon.co.uk> Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1299512819.2039.5.camel@castor.rsk> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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