[PATCH] powerpc: Add doorbell tracepoints

[Anton Blanchard]

Hi Russell,

> snowpatch builds failed for this patch on all 64-bit configurations
> (ppc64e, ppc64 and ppc64le) with the following:

Thanks! Stupid bug on my part, need more quilt ref. Update to follow.

Anton

> arch/powerpc/kernel/dbell.c:85:9: error: undefined identifier
> 'trace_doorbell_entry'
> arch/powerpc/kernel/dbell.c:96:9: error: undefined identifier
> 'trace_doorbell_exit'
> ./arch/powerpc/include/asm/spinlock.h:171:9: warning: context
> imbalance in 'key_user_put' - unexpected unlock
> arch/powerpc/kernel/dbell.c: In function 'doorbell_exception':
> arch/powerpc/kernel/dbell.c:85:2: error: implicit declaration of
> function 'trace_doorbell_entry'; did you mean 'trace_irq_entry'?
> [-Werror=implicit- function-declaration]
>   trace_doorbell_entry(regs);
>   ^~~~~~~~~~~~~~~~~~~~
>   trace_irq_entry
> arch/powerpc/kernel/dbell.c:96:2: error: implicit declaration of
> function 'trace_doorbell_exit'; did you mean 'trace_irq_exit'?
> [-Werror=implicit-function- declaration]
>   trace_doorbell_exit(regs);
>   ^~~~~~~~~~~~~~~~~~~
>   trace_irq_exit
> cc1: all warnings being treated as errors
> scripts/Makefile.build:305: recipe for target
> 'arch/powerpc/kernel/dbell.o' failed make[1]: ***
> [arch/powerpc/kernel/dbell.o] Error 1 Makefile:1060: recipe for
> target 'arch/powerpc/kernel' failed
> 
> So does something else need to check for CONFIG_PPC_DOORBELL maybe?
> 
> You can see the failures here:
> http://patchwork.ozlabs.org/patch/978088/ - output in build_new.log
> (I know it's not pretty in there yet, you can search for "Error 1" to
> find the build failure)
> 
> - Russell
> 
>