linux-kernel - Re: [PATCH 10/21] ext4: Remove unnecessary release when memory allocation failed in ext4_mb_init

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Message-ID: <Y+qT83KMcIgkKjiB@li-bb2b2a4c-3307-11b2-a85c-8fa5c3a69313.ibm.com>
Date:   Tue, 14 Feb 2023 01:18:03 +0530
From:   Ojaswin Mujoo <ojaswin@...ux.ibm.com>
To:     Kemeng Shi <shikemeng@...weicloud.com>
Cc:     tytso@....edu, adilger.kernel@...ger.ca, jack@...e.cz,
        linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 10/21] ext4: Remove unnecessary release when memory
 allocation failed in ext4_mb_init_cache

On Fri, Feb 10, 2023 at 03:48:14AM +0800, Kemeng Shi wrote:
> If we alloc array of buffer_head failed, there is no resource need to be
> freed and we can simpily return error.
> 
> Signed-off-by: Kemeng Shi <shikemeng@...weicloud.com>
> ---
>  fs/ext4/mballoc.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
> index ad9e3b7d3198..15fc7105becc 100644
> --- a/fs/ext4/mballoc.c
> +++ b/fs/ext4/mballoc.c
> @@ -1168,10 +1168,8 @@ static int ext4_mb_init_cache(struct page *page, char *incore, gfp_t gfp)
>  	if (groups_per_page > 1) {
>  		i = sizeof(struct buffer_head *) * groups_per_page;
>  		bh = kzalloc(i, gfp);
> -		if (bh == NULL) {
> -			err = -ENOMEM;
> -			goto out;
> -		}
> +		if (bh == NULL)
> +			return -ENOMEM;
>  	} else
>  		bh = &bhs;
>  
> -- 
> 2.30.0
> 
Feel free to add:

Reviewed-by: Ojaswin Mujoo <ojaswin@...ux.ibm.com>