linux-kernel - Re: [PATCH linux-next] powerpc:security: replace DEFINE_SIMPLE_ATTRIBUTE with DEFINE_DEBUGFS

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Message-ID: <9521dd23-34f6-837e-a397-ee2771675967@csgroup.eu>
Date:   Wed, 25 Aug 2021 08:42:24 +0200
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     CGEL <cgel.zte@...il.com>, Michael Ellerman <mpe@...erman.id.au>
Cc:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Nicholas Piggin <npiggin@...il.com>,
        Alexey Kardashevskiy <aik@...abs.ru>,
        Li Huafei <lihuafei1@...wei.com>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        Jing Yangyang <jing.yangyang@....com.cn>,
        Zeal Robot <zealci@....com.cn>
Subject: Re: [PATCH linux-next] powerpc:security: replace
 DEFINE_SIMPLE_ATTRIBUTE with DEFINE_DEBUGFS_ATTRIBUTE

Hi,

Le 25/08/2021 à 08:40, CGEL a écrit :
> From: Jing Yangyang <jing.yangyang@....com.cn>
> 
> Fix the following coccicheck warning:
> ./arch/powerpc/kernel/security.c:807:0-23: WARNING:
>   fops_entry_flush should be defined with DEFINE_DEBUGFS_ATTRIBUTE
> ./arch/powerpc/kernel/security.c:781:0-23:WARNING:
> fops_rfi_flush should be defined with DEFINE_DEBUGFS_ATTRIBUTE
> ./arch/powerpc/kernel/security.c:833:0-23:WARNING:
> fops_uaccess_flush should be defined with DEFINE_DEBUGFS_ATTRIBUTE

Can you give a few more details why the suggestion from coccicheck is a good suggestion ?

Thanks
Christophe

> 
> Reported-by: Zeal Robot <zealci@....com.cn>
> Signed-off-by: Jing Yangyang <jing.yangyang@....com.cn>
> ---
>   arch/powerpc/kernel/security.c | 6 +++---
>   1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/powerpc/kernel/security.c b/arch/powerpc/kernel/security.c
> index 1a99849..cf8ce24 100644
> --- a/arch/powerpc/kernel/security.c
> +++ b/arch/powerpc/kernel/security.c
> @@ -778,7 +778,7 @@ static int rfi_flush_get(void *data, u64 *val)
>   	return 0;
>   }
>   
> -DEFINE_SIMPLE_ATTRIBUTE(fops_rfi_flush, rfi_flush_get, rfi_flush_set, "%llu\n");
> +DEFINE_DEBUGFS_ATTRIBUTE(fops_rfi_flush, rfi_flush_get, rfi_flush_set, "%llu\n");
>   
>   static int entry_flush_set(void *data, u64 val)
>   {
> @@ -804,7 +804,7 @@ static int entry_flush_get(void *data, u64 *val)
>   	return 0;
>   }
>   
> -DEFINE_SIMPLE_ATTRIBUTE(fops_entry_flush, entry_flush_get, entry_flush_set, "%llu\n");
> +DEFINE_DEBUGFS_ATTRIBUTE(fops_entry_flush, entry_flush_get, entry_flush_set, "%llu\n");
>   
>   static int uaccess_flush_set(void *data, u64 val)
>   {
> @@ -830,7 +830,7 @@ static int uaccess_flush_get(void *data, u64 *val)
>   	return 0;
>   }
>   
> -DEFINE_SIMPLE_ATTRIBUTE(fops_uaccess_flush, uaccess_flush_get, uaccess_flush_set, "%llu\n");
> +DEFINE_DEBUGFS_ATTRIBUTE(fops_uaccess_flush, uaccess_flush_get, uaccess_flush_set, "%llu\n");
>   
>   static __init int rfi_flush_debugfs_init(void)
>   {
>