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authorHeiko Carstens <heiko.carstens@de.ibm.com>2010-09-16 12:42:25 (GMT)
committerIngo Molnar <mingo@elte.hu>2010-09-16 14:38:34 (GMT)
commit31915ab4cbf507aadab40847cf9989da5e88b090 (patch)
tree48f7f64cbfd82ee88cece1384e6eb949ef2cbed0 /drivers/base
parent7740191cd909b75d75685fb08a5d1f54b8a9d28b (diff)
downloadlinux-fsl-qoriq-31915ab4cbf507aadab40847cf9989da5e88b090.tar.xz
sched: Remove branch hints within context_switch()
With 710390d9 "sched: Optimize branch hint in context_switch()" the branch hint logic within context_switch() got inversed. In fact the hints "if (likely(!mm))" and "if (likely(!prev->mm))" mean that it is likely that the previous and next task are kernel threads. That assumption is certainly counter intuitive, but Tim has shown that at least with his workload this is true. Nevertheless the truth is: it depends on the current workload. So just remove the annotations which also improves readability. Reported-by: Tim Blechmann <tim@klingt.org> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> LKML-Reference: <20100916124225.GA2209@osiris.boeblingen.de.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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