linux-kernel - Re: [PATCH v2 1/5] memblock test: fix implicit declaration of function 'virt_to

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Message-ID: <Zqcqky8XdiQy3mO-@kernel.org>
Date: Mon, 29 Jul 2024 08:37:23 +0300
From: Mike Rapoport <rppt@...nel.org>
To: Wei Yang <richard.weiyang@...il.com>
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH v2 1/5] memblock test: fix implicit declaration of
 function 'virt_to_phys'

On Mon, Jul 29, 2024 at 01:47:21AM +0000, Wei Yang wrote:
> Commit 94ff46de4a73 ("memblock: Move late alloc warning down to phys
> alloc") introduce the usage of virt_to_phys(), which is not defined in
> memblock tests.
> 
> Define it in mm.h to fix the build error.
> 
> Signed-off-by: Wei Yang <richard.weiyang@...il.com>
> 
> ---
> v2: move definition to mm.h
> ---
>  tools/include/linux/mm.h | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/tools/include/linux/mm.h b/tools/include/linux/mm.h
> index cad4f2927983..9db45c5d00fc 100644
> --- a/tools/include/linux/mm.h
> +++ b/tools/include/linux/mm.h
> @@ -20,6 +20,8 @@
>  #define pfn_to_page(pfn) ((void *)((pfn) * PAGE_SIZE))
>  
>  #define phys_to_virt phys_to_virt
> +#define virt_to_phys(p) ((unsigned long)p)
> +

Please don't break #define of phys_to_virt from the static inline
implementation.

And please make virt_to_phys a static inline similarly to phys_to_virt.

>  static inline void *phys_to_virt(unsigned long address)
>  {
>  	return __va(address);
> -- 
> 2.34.1
> 

-- 
Sincerely yours,
Mike.