linux-kernel - Re: [PATCH] arch/powerpc: Remove unnecessary endian conversion code in XICS

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Message-ID: <ZJ5zKJ2ZjHx6fsZk@li-c6426e4c-27cf-11b2-a85c-95d65bc0de0e.ibm.com>
Date:   Fri, 30 Jun 2023 11:46:08 +0530
From:   Gautam Menghani <gautam@...ux.ibm.com>
To:     mpe@...erman.id.au, npiggin@...il.com, christophe.leroy@...roup.eu
Cc:     linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arch/powerpc: Remove unnecessary endian conversion code
 in XICS

On Fri, Jun 30, 2023 at 11:43:26AM +0530, Gautam Menghani wrote:
> Remove an unnecessary piece of code that does an endianness conversion but
> does not use the result. The following warning was reported by Clang's
> static analyzer:
> 
> arch/powerpc/sysdev/xics/ics-opal.c:114:2: warning: Value stored to
> 'server' is never read [deadcode.DeadStores]
>         server = be16_to_cpu(oserver);
> 
> As the result of endianness conversion is never used, delete the line
> and fix the warning.
> 
> Signed-off-by: Gautam Menghani <gautam@...ux.ibm.com>
> ---
>  arch/powerpc/sysdev/xics/ics-opal.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/arch/powerpc/sysdev/xics/ics-opal.c b/arch/powerpc/sysdev/xics/ics-opal.c
> index 6cfbb4fac7fb..5fe73dabab79 100644
> --- a/arch/powerpc/sysdev/xics/ics-opal.c
> +++ b/arch/powerpc/sysdev/xics/ics-opal.c
> @@ -111,7 +111,6 @@ static int ics_opal_set_affinity(struct irq_data *d,
>  		       __func__, d->irq, hw_irq, rc);
>  		return -1;
>  	}
> -	server = be16_to_cpu(oserver);
>  
>  	wanted_server = xics_get_irq_server(d->irq, cpumask, 1);
>  	if (wanted_server < 0) {
> -- 
> 2.39.3
> 

I resent this patch by mistake, please ignore this. Apologies for the
trouble.