linux-kernel - Re: [PATCH] remoteproc: rcar_rproc: silince address space sparse warning

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Date:   Mon, 8 Aug 2022 09:12:27 +0800
From:   Kefeng Wang <wangkefeng.wang@...wei.com>
To:     Mathieu Poirier <mathieu.poirier@...aro.org>,
        Julien Massot <julien.massot@....bzh>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        <linux-remoteproc@...r.kernel.org>
CC:     Geert Uytterhoeven <geert+renesas@...der.be>,
        <linux-kernel@...r.kernel.org>, <rmk+kernel@...linux.org.uk>,
        "kernel test robot" <lkp@...el.com>
Subject: Re: [PATCH] remoteproc: rcar_rproc: silince address space sparse
 warning

ignore this one， send the patch twice.

On 2022/8/8 9:16, Kefeng Wang wrote:
> Fix sparse warnings,
>     drivers/remoteproc/st_remoteproc.c:98:12: sparse: sparse: incorrect type in assignment (different address spaces) @@
> 	   expected void *va @@     got void [noderef] __iomem * @@
>     drivers/remoteproc/st_remoteproc.c:98:12: sparse:     expected void *va
>     drivers/remoteproc/st_remoteproc.c:98:12: sparse:     got void [noderef] __iomem *
>     ...
>     drivers/remoteproc/st_remoteproc.c:114:20: sparse:     expected void volatile [noderef] __iomem *io_addr
>     drivers/remoteproc/st_remoteproc.c:114:20: sparse:     got void *va
>
> Add __iomem to io address space 'va' to fix it.
>
> Reported-by: kernel test robot <lkp@...el.com>
> Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>
> ---
> note: the commit d803336abdbc "(ARM: mm: kill unused runtime hook arch_iounmap())"
> won't introduce the warning, but lkp report issue to me many times,
> let's fix it.
>
>   drivers/remoteproc/rcar_rproc.c | 2 +-
>   include/linux/remoteproc.h      | 2 +-
>   2 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/remoteproc/rcar_rproc.c b/drivers/remoteproc/rcar_rproc.c
> index aa86154109c7..e3363a4cde0a 100644
> --- a/drivers/remoteproc/rcar_rproc.c
> +++ b/drivers/remoteproc/rcar_rproc.c
> @@ -22,7 +22,7 @@ static int rcar_rproc_mem_alloc(struct rproc *rproc,
>   				 struct rproc_mem_entry *mem)
>   {
>   	struct device *dev = &rproc->dev;
> -	void *va;
> +	void __iomem *va;
>   
>   	dev_dbg(dev, "map memory: %pa+%zx\n", &mem->dma, mem->len);
>   	va = ioremap_wc(mem->dma, mem->len);
> diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
> index 7c943f0a2fc4..c0c950cf7d72 100644
> --- a/include/linux/remoteproc.h
> +++ b/include/linux/remoteproc.h
> @@ -330,7 +330,7 @@ struct rproc;
>    * @alloc: specific memory allocator function
>    */
>   struct rproc_mem_entry {
> -	void *va;
> +	void __iomem *va;
>   	bool is_iomem;
>   	dma_addr_t dma;
>   	size_t len;