linux-kernel - Re: [PATCH] locktorture: Fix assignment of boolean variables

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Date:   Sat, 1 Dec 2018 12:37:01 -0800
From:   "Paul E. McKenney" <paulmck@...ux.ibm.com>
To:     Wen Yang <wen.yang99@....com.cn>
Cc:     Davidlohr Bueso <dave@...olabs.net>,
        Josh Triplett <josh@...htriplett.org>,
        linux-kernel@...r.kernel.org, zhong.weidong@....com.cn,
        peterz@...radead.org, mingo@...hat.com, will.deacon@....com
Subject: Re: [PATCH] locktorture: Fix assignment of boolean variables

On Sat, Dec 01, 2018 at 04:31:49PM +0800, Wen Yang wrote:
> Fix the following warnings reported by coccinelle:
> 
> kernel/locking/locktorture.c:703:6-10: WARNING: Assignment of bool to 0/1
> kernel/locking/locktorture.c:918:2-20: WARNING: Assignment of bool to 0/1
> kernel/locking/locktorture.c:949:3-20: WARNING: Assignment of bool to 0/1
> kernel/locking/locktorture.c:682:2-19: WARNING: Assignment of bool to 0/1
> kernel/locking/locktorture.c:688:2-19: WARNING: Assignment of bool to 0/1
> kernel/locking/locktorture.c:648:2-20: WARNING: Assignment of bool to 0/1
> kernel/locking/locktorture.c:654:2-20: WARNING: Assignment of bool to 0/1
> 
> This patch also makes the code more readable.
> 
> Signed-off-by: Wen Yang <wen.yang99@....com.cn>
> CC: Davidlohr Bueso <dave@...olabs.net>
> CC: "Paul E. McKenney" <paulmck@...ux.ibm.com>
> CC: Josh Triplett <josh@...htriplett.org>
> CC: linux-kernel@...r.kernel.org

Adding the current maintainers on CC.

							Thanx, Paul

> ---
>  kernel/locking/locktorture.c | 14 +++++++-------
>  1 file changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/kernel/locking/locktorture.c b/kernel/locking/locktorture.c
> index 7d0b0ed74404..cd95c01491d8 100644
> --- a/kernel/locking/locktorture.c
> +++ b/kernel/locking/locktorture.c
> @@ -645,13 +645,13 @@ static int lock_torture_writer(void *arg)
>  		cxt.cur_ops->writelock();
>  		if (WARN_ON_ONCE(lock_is_write_held))
>  			lwsp->n_lock_fail++;
> -		lock_is_write_held = 1;
> +		lock_is_write_held = true;
>  		if (WARN_ON_ONCE(lock_is_read_held))
>  			lwsp->n_lock_fail++; /* rare, but... */
>  
>  		lwsp->n_lock_acquired++;
>  		cxt.cur_ops->write_delay(&rand);
> -		lock_is_write_held = 0;
> +		lock_is_write_held = false;
>  		cxt.cur_ops->writeunlock();
>  
>  		stutter_wait("lock_torture_writer");
> @@ -679,13 +679,13 @@ static int lock_torture_reader(void *arg)
>  			schedule_timeout_uninterruptible(1);
>  
>  		cxt.cur_ops->readlock();
> -		lock_is_read_held = 1;
> +		lock_is_read_held = true;
>  		if (WARN_ON_ONCE(lock_is_write_held))
>  			lrsp->n_lock_fail++; /* rare, but... */
>  
>  		lrsp->n_lock_acquired++;
>  		cxt.cur_ops->read_delay(&rand);
> -		lock_is_read_held = 0;
> +		lock_is_read_held = false;
>  		cxt.cur_ops->readunlock();
>  
>  		stutter_wait("lock_torture_reader");
> @@ -700,7 +700,7 @@ static int lock_torture_reader(void *arg)
>  static void __torture_print_stats(char *page,
>  				  struct lock_stress_stats *statp, bool write)
>  {
> -	bool fail = 0;
> +	bool fail = false;
>  	int i, n_stress;
>  	long max = 0, min = statp ? statp[0].n_lock_acquired : 0;
>  	long long sum = 0;
> @@ -915,7 +915,7 @@ static int __init lock_torture_init(void)
>  
>  	/* Initialize the statistics so that each run gets its own numbers. */
>  	if (nwriters_stress) {
> -		lock_is_write_held = 0;
> +		lock_is_write_held = false;
>  		cxt.lwsa = kmalloc_array(cxt.nrealwriters_stress,
>  					 sizeof(*cxt.lwsa),
>  					 GFP_KERNEL);
> @@ -946,7 +946,7 @@ static int __init lock_torture_init(void)
>  		}
>  
>  		if (nreaders_stress) {
> -			lock_is_read_held = 0;
> +			lock_is_read_held = false;
>  			cxt.lrsa = kmalloc_array(cxt.nrealreaders_stress,
>  						 sizeof(*cxt.lrsa),
>  						 GFP_KERNEL);
> -- 
> 2.19.1
>