[PATCH 3/8] jump_label: introduce DEFINE_STATIC_KEY_{TRUE,FALSE}_ARRAY macros

Kevin Hao haokexin at gmail.com
Fri Aug 21 13:23:34 AEST 2015

On Thu, Aug 20, 2015 at 08:31:58PM +0200, Peter Zijlstra wrote:
> On Thu, Aug 20, 2015 at 08:14:31PM +0800, Kevin Hao wrote:
> > These are used to define a static_key_{true,false} array.
> Yes but why...
> there might have been some clue in the patches you didn't send me, but
> since you didn't send them, I'm left wondering.

Sorry for the confusion. In order to use jump label for the
{cpu,mmu}_has_feature() functions on powerpc, we need to declare an array of
32 or 64 static_key_true (one static_key_true for each cpu or mmu feature).
The following are the two patches which depends on this patch.

So far only DEFINE_STATIC_KEY_TRUE_ARRAY macro is used, but I think it may seem
canonical to define the macros for both true or false keys at the same time.

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