strange code in include/linux/kernel_stat.h
From: Dmitri Vorobiev
Date: Fri Mar 27 2009 - 06:31:36 EST
Hi,
Depending on whether the CONFIG_GENERIC_HARDIRQS option is enabled or not, the header file include/linux/kernel_stat.h defines the following two entities:
- the macro kstat_irqs_this_cpu for the case when CONFIG_GENERIC_HARDIRQS is set:
#define kstat_irqs_this_cpu(DESC) \
((DESC)->kstat_irqs[smp_processor_id()])
- another macro with the same name as the macro above but for the case CONFIG_GENERIC_HARDIRQS is not set:
#define kstat_irqs_this_cpu(irq) \
(kstat_this_cpu.irqs[irq])
Apparently, it is assumed that the types for the macro argument are different, and depend on the value of CONFIG_GENERIC_HARDIRQS. Is this intentional?
Thanks,
Dmitri
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