Messages in this thread | | | Subject | Re: CONFIG_PREEMPT_COUNT | From | Paul Bolle <> | Date | Mon, 31 Mar 2014 14:24:57 +0200 |
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Alexey,
On Mon, 2014-03-31 at 10:38 +0000, Skidanov, Alexey wrote: > What is the purpose of CONFIG_PREEMPT_COUNT define and how I can > define it?
CONFIG_PREEMPT_COUNT is a Kconfig macro, ie it's (in short) to be defined as a result one of the "*config" make targets. And doing git grep -nw PREEMPT_COUNT
gives kernel/Kconfig.preempt:38: select PREEMPT_COUNT kernel/Kconfig.preempt:57:config PREEMPT_COUNT lib/Kconfig.debug:964: select PREEMPT_COUNT
And looking at those hits it seems PREEMPT_COUNT will be set, and therefore CONFIG_PREEMPT_COUNT defined, if either PREEMPT or DEBUG_ATOMIC_SLEEP are set in a .config.
(I'm not familiar with PREEMPT_COUNT. I think I never used it.)
Hope this helps,
Paul Bolle
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