linux-kernel - Re: include/linux/kprobes.h:361:2: error: invalid use of undefined type 'struct kprobe

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Message-ID: <20160313160016.GS19428@n2100.arm.linux.org.uk>
Date:	Sun, 13 Mar 2016 16:00:16 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	kbuild test robot <fengguang.wu@...el.com>
Cc:	kbuild-all@...org, linux-kernel@...r.kernel.org,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: include/linux/kprobes.h:361:2: error: invalid use of undefined
 type 'struct kprobe_ctlblk'

On Sun, Mar 13, 2016 at 04:37:14PM +0800, kbuild test robot wrote:
> Hi Russell,
> 
> FYI, the error/warning still remains.

Sorry, I've no clue about this.  From what I can see, kprobes.h is
correct.

#ifdef CONFIG_KPROBES
DECLARE_PER_CPU(struct kprobe *, current_kprobe);
DECLARE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk);
...
static inline struct kprobe_ctlblk *get_kprobe_ctlblk(void)
{
        return this_cpu_ptr(&kprobe_ctlblk);
}

The only way I can see that kprobe_ctlblk would be undefined is if
MN10300 were doing something totally weird with DECLARE_PER_CPU().

Since I know precisely nothing about MN10300, and it doesn't seem to
touch the definition of DECLARE_PER_CPU(), I'm at a total loss to
understand how this error can occur.

Some help would be nice - as right now I have absolutely no idea on
this.

-- 
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