Date: Thu, 27 Feb 2014 11:32:30 -0500
From: Steven Rostedt <rostedt@goodmis.org>
To: Rashika Kheria <rashika.kheria@gmail.com>
Cc: linux-kernel@vger.kernel.org, Chris Metcalf <cmetcalf@tilera.com>,
        Tony Lu <zlu@tilera.com>,
        Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        "Michael S. Tsirkin" <mst@redhat.com>,
        "David S. Miller" <davem@davemloft.net>,
        Ingo Molnar <mingo@kernel.org>, Alex Elder <alex.elder@linaro.org>,
        Dhaval Giani <dhaval.giani@gmail.com>,
        Stephen Rothwell <sfr@canb.auug.org.au>,
        Daniel Borkmann <dborkman@redhat.com>,
        Andre Naujoks <nautsch2@gmail.com>, Jason Baron <jbaron@akamai.com>,
        Rusty Russell <rusty@rustcorp.com.au>,
        Randy Dunlap <rdunlap@infradead.org>, Robin Holt <holt@sgi.com>,
        Tony Luck <tony.luck@intel.com>, Alex Thorlton <athorlton@sgi.com>,
        Kees Cook <keescook@chromium.org>, Tejun Heo <tj@kernel.org>,
        Chen Gang <gang.chen@asianux.com>, josh@joshtriplett.org
Subject: Re: [PATCH 02/46] kernel: Add prototype definition to
 include/linux/kernel.h
Message-ID: <20140227113230.3e726bc7@gandalf.local.home>
In-Reply-To: <644cc80558c61ce1f498393a77df366ad0d7b960.1393493276.git.rashika.kheria@gmail.com>
References: <7b4a60c74ced00e0d65c38488f20dc4bd69f0dd2.1393493276.git.rashika.kheria@gmail.com>
	<644cc80558c61ce1f498393a77df366ad0d7b960.1393493276.git.rashika.kheria@gmail.com>
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Sender: linux-kernel-owner@vger.kernel.org

On Thu, 27 Feb 2014 16:38:50 +0530
Rashika Kheria <rashika.kheria@gmail.com> wrote:

> Add prototype declaration to header file include/linux/kernel.h because
> it is used by more than one file.
> 
> This also eliminates the following warning in kernel/panic.c:
> kernel/panic.c:55:13: warning: no previous prototype for ‘panic_smp_self_stop’ [-Wmissing-prototypes]
> 
> Signed-off-by: Rashika Kheria <rashika.kheria@gmail.com>
> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
> ---
>  arch/tile/kernel/smp.c |    1 +
>  include/linux/kernel.h |    2 ++
>  kernel/panic.c         |    1 +
>  3 files changed, 4 insertions(+)
> 
> diff --git a/arch/tile/kernel/smp.c b/arch/tile/kernel/smp.c
> index 01e8ab2..8b645fd 100644
> --- a/arch/tile/kernel/smp.c
> +++ b/arch/tile/kernel/smp.c
> @@ -19,6 +19,7 @@
>  #include <linux/io.h>
>  #include <linux/irq.h>
>  #include <linux/module.h>
> +#include <linux/kernel.h>
>  #include <asm/cacheflush.h>
>  #include <asm/homecache.h>
>  
> diff --git a/include/linux/kernel.h b/include/linux/kernel.h
> index 196d1ea..c7cee7d 100644
> --- a/include/linux/kernel.h
> +++ b/include/linux/kernel.h
> @@ -154,6 +154,8 @@ struct completion;
>  struct pt_regs;
>  struct user;
>  
> +void __weak panic_smp_self_stop(void);

Is __weak required in a prototype? What about the override that is not
weak.

-- Steve


> +
>  #ifdef CONFIG_PREEMPT_VOLUNTARY
>  extern int _cond_resched(void);
>  # define might_resched() _cond_resched()
> diff --git a/kernel/panic.c b/kernel/panic.c
> index 6d63003..14e08c2 100644
> --- a/kernel/panic.c
> +++ b/kernel/panic.c
> @@ -23,6 +23,7 @@
>  #include <linux/sysrq.h>
>  #include <linux/init.h>
>  #include <linux/nmi.h>
> +#include <linux/kernel.h>
>  
>  #define PANIC_TIMER_STEP 100
>  #define PANIC_BLINK_SPD 18

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