linux-kernel - Re: [PATCH] microblaze: remove unneeded variable 'err'

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Date:   Wed, 10 Mar 2021 10:30:47 +0100
From:   Michal Simek <monstr@...str.eu>
To:     Yang Li <yang.lee@...ux.alibaba.com>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH] microblaze: remove unneeded variable 'err'



On 3/10/21 9:50 AM, Yang Li wrote:
> Fix the following coccicheck warning:
> ./arch/microblaze/kernel/signal.c:60:14-17: Unneeded variable: "err".
> Return "0" on line 78
> 
> Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
> Signed-off-by: Yang Li <yang.lee@...ux.alibaba.com>
> ---
>  arch/microblaze/kernel/signal.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/arch/microblaze/kernel/signal.c b/arch/microblaze/kernel/signal.c
> index fc61eb0..c4b7b30 100644
> --- a/arch/microblaze/kernel/signal.c
> +++ b/arch/microblaze/kernel/signal.c
> @@ -57,8 +57,6 @@ struct rt_sigframe {
>  static int restore_sigcontext(struct pt_regs *regs,
>  				struct sigcontext __user *sc, int *rval_p)
>  {
> -	unsigned int err = 0;
> -
>  #define COPY(x)		{err |= __get_user(regs->x, &sc->regs.x); }

This is wrong because as you use err is used here.

Thanks,
Michal


>  	COPY(r0);
>  	COPY(r1);
> @@ -75,7 +73,7 @@ static int restore_sigcontext(struct pt_regs *regs,
>  
>  	*rval_p = regs->r3;
>  
> -	return err;
> +	return 0;
>  }
>  
>  asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
> 

-- 
Michal Simek, Ing. (M.Eng), OpenPGP -> KeyID: FE3D1F91
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel - Xilinx Microblaze
Maintainer of Linux kernel - Xilinx Zynq ARM and ZynqMP ARM64 SoCs
U-Boot custodian - Xilinx Microblaze/Zynq/ZynqMP/Versal SoCs