[PATCH 01/27] mm: remove a pointless CONFIG_ZONE_DEVICE check in memremap_pages

[Miaohe Lin]

On 2022/2/10 15:28, Christoph Hellwig wrote:
> memremap.c is only built when CONFIG_ZONE_DEVICE is set, so remove
> the superflous extra check.
> 
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> Reviewed-by: Logan Gunthorpe <logang at deltatee.com>
> Reviewed-by: Jason Gunthorpe <jgg at nvidia.com>
> Reviewed-by: Chaitanya Kulkarni <kch at nvidia.com>
> Reviewed-by: Muchun Song <songmuchun at bytedance.com>
> Reviewed-by: Dan Williams <dan.j.williams at intel.com>
> ---
>  mm/memremap.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/mm/memremap.c b/mm/memremap.c
> index 6aa5f0c2d11fda..5f04a0709e436e 100644
> --- a/mm/memremap.c
> +++ b/mm/memremap.c
> @@ -328,8 +328,7 @@ void *memremap_pages(struct dev_pagemap *pgmap, int nid)
>  		}
>  		break;
>  	case MEMORY_DEVICE_FS_DAX:
> -		if (!IS_ENABLED(CONFIG_ZONE_DEVICE) ||
> -		    IS_ENABLED(CONFIG_FS_DAX_LIMITED)) {
> +		if (IS_ENABLED(CONFIG_FS_DAX_LIMITED)) {
>  			WARN(1, "File system DAX not supported\n");
>  			return ERR_PTR(-EINVAL);
>  		}
> 

LGTM. Thanks.

Reviewed-by: Miaohe Lin <linmiaohe at huawei.com>