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

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Date:	Fri, 21 Nov 2014 18:32:15 +1100
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Jiri Kosina <jkosina@...e.cz>, Petr Mladek <pmladek@...e.cz>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Subject: linux-next: build failure after merge of the ftrace tree

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 reverted that commit (and the following one (a9edc8809328 "x86/nmi:
Perform a safe NMI stack trace on all CPUs" in case it depended in it)
for today.
-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au

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