linux-kernel - Re: sibyte: pointless if tests

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Date: Wed, 28 Feb 2024 12:52:11 +0100
From: Philippe Mathieu-Daudé <philmd@...aro.org>
To: Joe Perches <joe@...ches.com>,
 Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc: linux-mips@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: sibyte: pointless if tests

On 24/2/24 23:28, Joe Perches wrote:
> A checkpatch modification was suggested privately about
> braces around an if test like
> 
> 	if (foo)
> 		;
> 
> so I thought I'd see how many of these possibly pointless
> if tests exist.  There aren't many.
> 
> Here are a couple in sibyte:
> 
> Maybe this should be documented as:
> 
> 	"well, don't know what to do here"

Or pr_devel() / pr_warn() if you want someone to notice it :)

> 
> $ cat if_semi.cocci
> @@
> expression e;
> @@
> 
> *	if (e) ;
> 
> $ spatch --very-quiet -sp-file if_semi.cocci .
> diff -u -p ./arch/mips/sibyte/common/cfe_console.c /tmp/nothing/arch/mips/sibyte/common/cfe_console.c
> --- ./arch/mips/sibyte/common/cfe_console.c
> +++ /tmp/nothing/arch/mips/sibyte/common/cfe_console.c
> @@ -22,8 +22,6 @@ static void cfe_console_write(struct con
>   		if (str[i] == '\n') {
>   			do {
>   				written = cfe_write(cfe_cons_handle, &str[last], i-last);
> -				if (written < 0)
> -					;
>   				last += written;
>   			} while (last < i);
>   			while (cfe_write(cfe_cons_handle, "\r", 1) <= 0)
> @@ -33,8 +31,6 @@ static void cfe_console_write(struct con
>   	if (last != count) {
>   		do {
>   			written = cfe_write(cfe_cons_handle, &str[last], count-last);
> -			if (written < 0)
> -				;
>   			last += written;
>   		} while (last < count);
>   	}
>