linux-kernel - Re: [PATCH -next] module: Use vzalloc() instead of vmalloc()/memset(0)

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Date:   Mon, 4 Jul 2022 15:45:18 +0100
From:   Aaron Tomlin <atomlin@...hat.com>
To:     Yang Yingliang <yangyingliang@...wei.com>
Cc:     linux-kernel@...r.kernel.org, linux-modules@...r.kernel.org,
        mcgrof@...nel.org
Subject: Re: [PATCH -next] module: Use vzalloc() instead of
 vmalloc()/memset(0)

On Mon 2022-07-04 20:03 +0800, Yang Yingliang wrote:
> Use vzalloc() instead of vmalloc() and memset(0) to simpify the code.
> 
> Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
> ---
>  kernel/module/main.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/kernel/module/main.c b/kernel/module/main.c
> index fed58d30725d..02b67abc448f 100644
> --- a/kernel/module/main.c
> +++ b/kernel/module/main.c
> @@ -2138,7 +2138,7 @@ static int move_module(struct module *mod, struct load_info *info)
>  
>  #ifdef CONFIG_ARCH_WANTS_MODULES_DATA_IN_VMALLOC
>  	/* Do the allocs. */
> -	ptr = vmalloc(mod->data_layout.size);
> +	ptr = vzalloc(mod->data_layout.size);
>  	/*
>  	 * The pointer to this block is stored in the module structure
>  	 * which is inside the block. Just mark it as not being a
> @@ -2151,7 +2151,6 @@ static int move_module(struct module *mod, struct load_info *info)
>  		return -ENOMEM;
>  	}
>  
> -	memset(ptr, 0, mod->data_layout.size);
>  	mod->data_layout.base = ptr;
>  #endif
>  	/* Transfer each section which specifies SHF_ALLOC */
> -- 
> 2.25.1
> 

Hi Yang,

Nice!

Reviewed-by: Aaron Tomlin <atomlin@...hat.com>


Kind regards,

-- 
Aaron Tomlin