[RFC PATCH v2 1/9] arm: avoid using on_each_cpu hard coded ret value
Russell King - ARM Linux
linux at arm.linux.org.uk
Mon Jan 9 03:12:12 EST 2012
On Sun, Jan 08, 2012 at 03:32:21PM +0200, Gilad Ben-Yossef wrote:
> on_each_cpu always returns a hard coded return code of zero.
>
> Removing all tests based on this return value saves run time
> cycles for compares and code bloat for branches.
>
> Signed-off-by: Gilad Ben-Yossef <gilad at benyossef.com>
> Acked-by: Peter Zijlstra <a.p.zijlstra at chello.nl>
> Reviewed-by: Michal Nazarewicz <mina86 at mina86.com>
> CC: Will Deacon <will.deacon at arm.com>
> CC: Peter Zijlstra <a.p.zijlstra at chello.nl>
> CC: Paul Mackerras <paulus at samba.org>
> CC: Ingo Molnar <mingo at elte.hu>
> CC: Arnaldo Carvalho de Melo <acme at ghostprotocols.net>
> CC: Russell King <linux at arm.linux.org.uk>
Reviewed-by: Russell King <rmk+kernel at arm.linux.org.uk>
> CC: Grant Likely <grant.likely at secretlab.ca>
> CC: Rob Herring <rob.herring at calxeda.com>
> CC: linux-arm-kernel at lists.infradead.org
> CC: devicetree-discuss at lists.ozlabs.org
> ---
> arch/arm/kernel/perf_event.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c
> index 5bb91bf..6e9acb7 100644
> --- a/arch/arm/kernel/perf_event.c
> +++ b/arch/arm/kernel/perf_event.c
> @@ -616,7 +616,7 @@ static int __init
> cpu_pmu_reset(void)
> {
> if (cpu_pmu && cpu_pmu->reset)
> - return on_each_cpu(cpu_pmu->reset, NULL, 1);
> + on_each_cpu(cpu_pmu->reset, NULL, 1);
There's not much to review here...
Thanks.
> return 0;
> }
> arch_initcall(cpu_pmu_reset);
> --
> 1.7.0.4
>
More information about the devicetree-discuss
mailing list