Re: next-20081106: today's ftrace episode

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Alexey Dobriyan wrote:
On m68k-amiga:

  CC      arch/m68k/kernel/asm-offsets.s
In file included from include/linux/fs.h:287,
                 from include/linux/ftrace.h:5,		<===
                 from include/linux/hardirq.h:7,
                 from include2/asm/system.h:69,
                 from include/linux/list.h:7,		<===
                 from include/linux/preempt.h:11,
                 from include/linux/spinlock.h:50,
                 from include/linux/seqlock.h:29,
                 from include/linux/time.h:8,
                 from include/linux/timex.h:57,
                 from include/linux/sched.h:54,
                 from arch/m68k/kernel/asm-offsets.c:12:
include/linux/wait.h:37: error: field 'task_list' has incomplete type
	...

commit 7e5e26a3d8ac4bcadb380073dc9604c07a9a6198 aka "trace: fix hardirq header for non ftrace archs"


We only need to include the ftrace.h to declare the ftrace_nmi_enter and exit.

I could separate that out into its own "ftrace_irq.h" file, that hardirq.h can include. That should fix it.

basically all that would be needed in that file is this:

#ifdef CONFIG_DYNAMIC_FTRACE
   extern void ftrace_nmi_enter(void);
   extern void ftrace_nmi_exit(void);
#else
   static inline void ftrace_nmi_enter(void) { }
   static inline void ftrace_nmi_exit(void) { }
#endif /* CONFIG_DYNAMIC_FTRACE */

-- Steve


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