Re: [PATCH 1/4] mm/shmem: check return value of shmem_init_inodecache

[Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>]

On 2022/6/1 20:54, Matthew Wilcox wrote:
> 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();

kmem_cache_create return a pointer to the cache on success, NULL on failure，
so error = -ENOMEM; is right  :)

> 	if (error)
> 		goto out2;
>
> .