linux-kernel - Re: [PATCH 2/2] mdadm.c: fix compile error "switch condition has boolean value"

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Date:   Wed, 29 Mar 2017 11:47:28 -0400
From:   jes.sorensen@...il.com
To:     Gioh Kim <gi-oh.kim@...fitbricks.com>
Cc:     neilb@...e.com, linux-raid@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] mdadm.c: fix compile error "switch condition has boolean value"

Gioh Kim <gi-oh.kim@...fitbricks.com> writes:
> Remove a boolean expression in switch condition
> to prevent compile error of some compilers.

Please be specific, which compile is unable to handle this?

> Signed-off-by: Gioh Kim <gi-oh.kim@...fitbricks.com>
> ---
>  mdadm.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/mdadm.c b/mdadm.c
> index 08ddcab..a98a051 100644
> --- a/mdadm.c
> +++ b/mdadm.c
> @@ -1905,11 +1905,11 @@ static int misc_list(struct mddev_dev *devlist,
>  			rv |= SetAction(dv->devname, c->action);
>  			continue;
>  		}
> -		switch(dv->devname[0] == '/') {
> -			case 0:
> +		switch(dv->devname[0]) {
> +			default:
>  				mdfd = open_dev(dv->devname);
>  				if (mdfd >= 0) break;
> -			case 1:
> +			case '/':
>  				mdfd = open_mddev(dv->devname, 1);  
>  		}
>  		if (mdfd>=0) {

While I agree the original code is ugly, I am not convinced your
replacement is a lot prettier.

Thanks,
Jes