Re: [PATCH v5 3/5] liveupdate: kho_block: include linux/mm.h for virt/phys translation

[Pratyush Yadav <pratyush@kernel.org>]

On Fri, Sep 04 2026, George Guo wrote:

> From: George Guo <guodongtai@kylinos.cn>
>
> kho_block.c calls virt_to_phys() and phys_to_virt(). On LoongArch with
> CONFIG_KFENCE=y, these macros (in arch/loongarch/include/asm/io.h) expand
> to offset_in_page() and page_address(), both declared in <linux/mm.h>.
>
> Since kho_block.c does not include <linux/mm.h>, the translation unit
> fails to build with CONFIG_KFENCE=y:
>
>   asm/io.h: error: implicit declaration of function 'offset_in_page'
>   asm/io.h: error: implicit declaration of function 'page_address'
>
> Add the missing include to fix these build errors.
>
> This is the same root cause as the luo_session.c build fix previously
> acked by Mike Rapoport [1]; the virt_to_phys()/phys_to_virt() calls have
> since been refactored from luo_session.c into kho_block.c, so the fix
> moves with it.
>
> [1] https://lore.kernel.org/r/ai5nYlbERQBXRHSp@kernel.org/

Drop this paragraph please. History of previous patch postings doesn't
belong in the commit message. You should write this kind of things below
the "---".

>
> Co-developed-by: Kexin Liu <liukexin@kylinos.cn>
> Signed-off-by: Kexin Liu <liukexin@kylinos.cn>
> Signed-off-by: George Guo <guodongtai@kylinos.cn>
> ---
>  kernel/liveupdate/kho_block.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/kernel/liveupdate/kho_block.c b/kernel/liveupdate/kho_block.c
> index 0d2a342ef422..0d56891b2f4c 100644
> --- a/kernel/liveupdate/kho_block.c
> +++ b/kernel/liveupdate/kho_block.c
> @@ -25,6 +25,7 @@
>  #include <linux/kho/abi/block.h>
>  #include <linux/kho_block.h>
>  #include <linux/slab.h>
> +#include <linux/mm.h>
>  
>  /*
>   * Safeguard limit for the number of serialization blocks. This is used to

-- 
Regards,
Pratyush Yadav