Re: linux-next: build failure after merge of the ftrace tree

From: Steven Rostedt
Date: Fri Nov 21 2014 - 07:43:58 EST

On Fri, 21 Nov 2014 18:32:15 +1100
Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:

> Hi Steven,
> After merging the ftrace tree, today's linux-next build (powerpc
> allnoconfig) failed like this:
> In file included from include/asm-generic/percpu.h:6:0,
> from arch/powerpc/include/asm/percpu.h:19,
> from include/linux/percpu.h:11,
> from include/linux/sched.h:41,
> from arch/powerpc/kernel/asm-offsets.c:17:
> include/linux/percpu.h:138:17: error: 'printk_func_t' undeclared here (not in a function)
> DECLARE_PER_CPU(printk_func_t, printk_func);
> ^
> include/linux/percpu-defs.h:101:38: note: in definition of macro 'DECLARE_PER_CPU_SECTION'
> extern __PCPU_ATTRS(sec) __typeof__(type) name
> ^
> include/linux/percpu.h:138:1: note: in expansion of macro 'DECLARE_PER_CPU'
> DECLARE_PER_CPU(printk_func_t, printk_func);
> ^
> Caused by commit afdc34a3d3b8 ("printk: Add per_cpu printk func to
> allow printk to be diverted"). See Rule 1 in
> Documentation/SubmitChecklist.

I had to fight header include hell with that change. That's why rule 1
wasn't followed so well.

Thanks Jiri for fixing it. I'll start running your patch through my

-- Steve
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