linux-kernel - Re: [PATCH] mm: Make INVALID_PHYS

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Message-ID: <8ef6bea9-5905-4d15-be77-f58645d967d0-agordeev@linux.ibm.com>
Date: Tue, 21 Oct 2025 10:48:20 +0200
From: Alexander Gordeev <agordeev@...ux.ibm.com>
To: Anshuman Khandual <anshuman.khandual@....com>
Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org, iommu@...ts.linux.dev,
        linux-s390@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        virtualization@...ts.linux.dev
Subject: Re: [PATCH] mm: Make INVALID_PHYS_ADDR a generic macro

On Tue, Oct 21, 2025 at 03:56:38AM +0100, Anshuman Khandual wrote:
> INVALID_PHYS_ADDR has very similar definitions across the code base. Hence
> just move that inside header <liux/mm.h> for more generic usage. Also drop
> the now redundant ones which are no longer required.
> 
> Cc: linux-kernel@...r.kernel.org
> Cc: linux-mm@...ck.org
> Cc: iommu@...ts.linux.dev
> Cc: linux-s390@...r.kernel.org
> Cc: linux-arm-kernel@...ts.infradead.org
> Cc: virtualization@...ts.linux.dev
> Signed-off-by: Anshuman Khandual <anshuman.khandual@....com>
> ---
>  arch/arm64/mm/mmu.c                  | 2 --
>  arch/s390/boot/vmem.c                | 1 -
>  drivers/vdpa/vdpa_user/iova_domain.h | 2 --
>  include/linux/mm.h                   | 2 ++
>  kernel/dma/swiotlb.c                 | 2 --
>  5 files changed, 2 insertions(+), 7 deletions(-)
...
> diff --git a/arch/s390/boot/vmem.c b/arch/s390/boot/vmem.c
> index cea3de4dce8c..fbe64ffdfb96 100644
> --- a/arch/s390/boot/vmem.c
> +++ b/arch/s390/boot/vmem.c
> @@ -16,7 +16,6 @@
>  #include "decompressor.h"
>  #include "boot.h"
>  
> -#define INVALID_PHYS_ADDR (~(phys_addr_t)0)
>  struct ctlreg __bootdata_preserved(s390_invalid_asce);
>  
>  #ifdef CONFIG_PROC_FS

Acked-by: Alexander Gordeev <agordeev@...ux.ibm.com>	# s390

Thanks!