linux-kernel - Re: [PATCH 1/4] mm/shmem: check return value of shmem_init

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Date:   Wed, 1 Jun 2022 13:54:18 +0100
From:   Matthew Wilcox <willy@...radead.org>
To:     Chen Wandun <chenwandun@...wei.com>
Cc:     hughd@...gle.com, akpm@...ux-foundation.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] mm/shmem: check return value of shmem_init_inodecache

On Wed, Jun 01, 2022 at 08:44:14PM +0800, Chen Wandun wrote:
> -static void shmem_init_inodecache(void)
> +static struct kmem_cache *shmem_init_inodecache(void)
>  {
>  	shmem_inode_cachep = kmem_cache_create("shmem_inode_cache",
>  				sizeof(struct shmem_inode_info),
>  				0, SLAB_PANIC|SLAB_ACCOUNT, shmem_init_inode);
> +
> +	return shmem_inode_cachep;
>  }
>  
>  static void shmem_destroy_inodecache(void)
> @@ -3924,7 +3926,10 @@ void __init shmem_init(void)
>  {
>  	int error;
>  
> -	shmem_init_inodecache();
> +	if (!shmem_init_inodecache()) {
> +		error = -ENOMEM;
> +		goto out2;
> +	}

better to return the errno from shmem_init_inodecache():

	error = shmem_init_inodecache();
	if (error)
		goto out2;