Re: [PATCH] ARM: Don't enable GENERIC_LOCKBREAK with ticket spinlocks

From: Will Deacon
Date: Sun Aug 05 2012 - 09:20:59 EST


On Fri, Aug 03, 2012 at 11:42:42PM +0100, Stephen Boyd wrote:
> Now that ARM has implemented its spinlocks with tickets we don't
> need to use the generic lockbreak algorithm. Remove the Kconfig
> from ARM so that we use the arch_spin_is_contended() definition
> from the asm header. This also saves a word in each lock because
> we don't need the break_lock member anymore.
>
> Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
> ---
>
> It seems we define the arch_spin_is_contended() macro but we don't
> use it on SMP && PREEMPT kernels?

Thanks, I missed that.

Acked-by: Will Deacon <will.deacon@xxxxxxx>

Will
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