linux-kernel - Re: [PATCH 2/2] kernel/stop_machine.c: remove false assignment to static

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Message-ID: <20140507210411.GB2844@laptop.programming.kicks-ass.net>
Date:	Wed, 7 May 2014 23:04:11 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Fabian Frederick <fabf@...net.be>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	akpm <akpm@...ux-foundation.org>
Subject: Re: [PATCH 2/2] kernel/stop_machine.c: remove false assignment to
 static

On Wed, May 07, 2014 at 10:46:56PM +0200, Fabian Frederick wrote:
> This patch also fixes function prototype over 80 characters

And does it wrong.. Also does it really matter to GCC that we init the
bool? Surely it can see its 0 and put it in .bss anyway?

> Cc: Peter Zijlstra <peterz@...radead.org>
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Signed-off-by: Fabian Frederick <fabf@...net.be>
> ---
>  kernel/stop_machine.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/kernel/stop_machine.c b/kernel/stop_machine.c
> index 695f0c6..8d29ee2 100644
> --- a/kernel/stop_machine.c
> +++ b/kernel/stop_machine.c
> @@ -42,7 +42,7 @@ struct cpu_stopper {
>  
>  static DEFINE_PER_CPU(struct cpu_stopper, cpu_stopper);
>  static DEFINE_PER_CPU(struct task_struct *, cpu_stopper_task);
> -static bool stop_machine_initialized = false;
> +static bool stop_machine_initialized;
>  
>  /*
>   * Avoids a race between stop_two_cpus and global stop_cpus, where
> @@ -241,7 +241,8 @@ static void irq_cpu_stop_queue_work(void *arg)
>   *
>   * returns when both are completed.
>   */
> -int stop_two_cpus(unsigned int cpu1, unsigned int cpu2, cpu_stop_fn_t fn, void *arg)
> +int stop_two_cpus(unsigned int cpu1, unsigned int cpu2, cpu_stop_fn_t fn,
> +		  void *arg)

Its only 84, so I didn't care to wrap it, its more readable this way,
but if you want it split split it like:

int
stop_two_cpus(unsigned int cpu1, unsigned int cpu2, cpu_stop_fn_t fn, void *arg)

Or if you really have to split arguments to it in groups that make
sense; like:

int stop_two_cpus(unsigned int cpu1, unsigned int cpu2,
		  cpu_stop_fn_t fn, void *arg)

But really, these are two unrelated changes, and should therefore not be
in a single patch.
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