linux-kernel - Re: [PATCH v2] signal: trivial, fix the "timespec declared inside parameter list" warning

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Message-Id: <20110518163725.13e816fe.akpm@linux-foundation.org>
Date:	Wed, 18 May 2011 16:37:25 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	Mike Frysinger <vapier.adi@...il.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Tejun Heo <tj@...nel.org>,
	"Nikita V. Youshchenko" <nyoushchenko@...sta.com>,
	Matt Fleming <matt@...sole-pimps.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] signal: trivial, fix the
 "timespec declared inside parameter list" warning

On Mon, 16 May 2011 14:57:29 +0200
Oleg Nesterov <oleg@...hat.com> wrote:

> Fix the compile warning, do_sigtimedwait(struct timespec *) in signal.h
> needs the forward declaration of timespec.
> 

The offending patch is in your tree, so you may as well put this patch
in there too.

> --- sigprocmask/include/linux/signal.h~15_stw_warning	2011-05-12 20:44:43.000000000 +0200
> +++ sigprocmask/include/linux/signal.h	2011-05-16 14:53:08.000000000 +0200
> @@ -234,6 +234,9 @@ static inline int valid_signal(unsigned 
>  	return sig <= _NSIG ? 1 : 0;
>  }
>  
> +struct timespec;
> +struct pt_regs;
> +
>  extern int next_signal(struct sigpending *pending, sigset_t *mask);
>  extern int do_send_sig_info(int sig, struct siginfo *info,
>  				struct task_struct *p, bool group);

Please put the forward declarations at top-of-file.  In this case,
inside #ifdef __KERNEL__.  This reduces the risk of accumulating
duplicated forward declarations, as has happened in the past.



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