Messages in this thread | | | From | Ingo Oeser <> | Subject | Re: [PATCH] ARCH_HAS_IRQ_PER_CPU avoids dead code in __do_IRQ() | Date | Sat, 6 Aug 2005 23:28:50 +0200 |
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Hi Karsten,
On Saturday 06 August 2005 18:14, Karsten Wiese wrote: > From: Karsten Wiese <annabellesgarden@yahoo.de> > > IRQ_PER_CPU is not used by all architectures. > To avoid dead code generation in __do_IRQ() > this patch introduces the macro ARCH_HAS_IRQ_PER_CPU. > > ARCH_HAS_IRQ_PER_CPU is defined by architectures using > IRQ_PER_CPU in their > include/asm_ARCH/irq.h > file.
Why not the other way around?
Just define IRQ_PER_CPU to 0 on architectures not needing it and add a FAT comment there, that this disables it. Or make it a config option.
Then just leave the code as is and let GCC optimize the dead code away without any changes in the C file. It works, I just checked it ;-)
Regards
Ingo Oeser
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