Subject: Re: linux-next: build failure after merge of the akpm-current tree

From: Vivek Goyal <[email-masked]>
Date: Tue, 8 Sep 2020 09:50:51 -0400

On Tue, Sep 08, 2020 at 08:09:50PM +1000, Stephen Rothwell wrote:

[..]
> fs/fuse/virtio_fs.c: In function 'virtio_fs_setup_dax':
> fs/fuse/virtio_fs.c:838:9: error: 'struct dev_pagemap' has no member named 'res'; did you mean 'ref'?
>   838 |  pgmap->res = (struct resource){
>       |         ^~~
>       |         ref
> 
> Caused by commit
> 
>   b3e022c5a68c ("mm/memremap_pages: convert to 'struct range'")
> 
> interacting with commit
> 
>   9e2369c06c8a ("xen: add helpers to allocate unpopulated memory")
> 
> from Linus' tree (in v5.9-rc4) and commit
> 
>   7e833303db20 ("virtiofs: set up virtio_fs dax_device")
> 
> from the fuse tree.
> 
> I have added the following patch which may require more work but at
> least makes it all build.
> 
> From: Stephen Rothwell <[email-masked]>
> Date: Tue, 8 Sep 2020 20:00:20 +1000
> Subject: [PATCH] merge fix up for "mm/memremap_pages: convert to 'struct
>  range'"
> 
> Signed-off-by: Stephen Rothwell <[email-masked]>
> ---
>  drivers/xen/unpopulated-alloc.c | 15 +++++++++------
>  fs/fuse/virtio_fs.c             |  3 +--
>  2 files changed, 10 insertions(+), 8 deletions(-)
> 

[..]
> diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c
> index da3ede268604..8f27478497fa 100644
> --- a/fs/fuse/virtio_fs.c
> +++ b/fs/fuse/virtio_fs.c
> @@ -835,8 +835,7 @@ static int virtio_fs_setup_dax(struct virtio_device *vdev, struct virtio_fs *fs)
>  	 * initialize a struct resource from scratch (only the start
>  	 * and end fields will be used).
>  	 */
> -	pgmap->res = (struct resource){
> -		.name = "virtio-fs dax window",
> +	pgmap->range = (struct range){
>  		.start = (phys_addr_t) cache_reg.addr,
>  		.end = (phys_addr_t) cache_reg.addr + cache_reg.len - 1,
>  	};

Thanks Stephen. This change looks good to me for virtiofs.

Thanks
Vivek