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author | Nicolas Pitre <nicolas.pitre@linaro.org> | 2014-01-29 12:45:10 -0500 |
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committer | Ingo Molnar <mingo@kernel.org> | 2014-02-11 09:58:24 +0100 |
commit | d8c6ad3184ca6516a5cf457af1afaa293d8f09c0 (patch) | |
tree | dd7c96a0808480aac612746a7747725794c11e24 /drivers/macintosh/windfarm_cpufreq_clamp.c | |
parent | ad68cc7a777948b77f15a3dc3510918ff87ed0c0 (diff) | |
download | op-kernel-dev-d8c6ad3184ca6516a5cf457af1afaa293d8f09c0.zip op-kernel-dev-d8c6ad3184ca6516a5cf457af1afaa293d8f09c0.tar.gz |
sched/idle, PPC: Remove redundant cpuidle_idle_call()
The core idle loop now takes care of it. However a few things need
checking:
- Invocation of cpuidle_idle_call() in pseries_lpar_idle() happened
through arch_cpu_idle() and was therefore always preceded by a call
to ppc64_runlatch_off(). To preserve this property now that
cpuidle_idle_call() is invoked directly from core code, a call to
ppc64_runlatch_off() has been added to idle_loop_prolog() in
platforms/pseries/processor_idle.c.
- Similarly, cpuidle_idle_call() was followed by ppc64_runlatch_off()
so a call to the later has been added to idle_loop_epilog().
- And since arch_cpu_idle() always made sure to re-enable IRQs if they
were not enabled, this is now
done in idle_loop_epilog() as well.
The above was made in order to keep the execution flow close to the
original. I don't know if that was strictly necessary. Someone well
aquainted with the platform details might find some room for possible
optimizations.
Signed-off-by: Nicolas Pitre <nico@linaro.org>
Reviewed-by: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-sh@vger.kernel.org
Cc: linux-pm@vger.kernel.org
Cc: Russell King <linux@arm.linux.org.uk>
Cc: linaro-kernel@lists.linaro.org
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/n/tip-47o4m03citrfg9y1vxic5asb@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/macintosh/windfarm_cpufreq_clamp.c')
0 files changed, 0 insertions, 0 deletions