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Message-ID: <c9cc61db21e80b0b9304496567d0ed5feea47e25.camel@physik.fu-berlin.de>
Date: Tue, 14 Feb 2023 15:41:37 +0100
From: John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>
To: Mike Rapoport <rppt@...nel.org>,
Andrew Morton <akpm@...ux-foundation.org>
Cc: Arnd Bergmann <arnd@...db.de>,
Geert Uytterhoeven <geert@...ux-m68k.org>,
Greg Ungerer <gerg@...ux-m68k.org>,
Guenter Roeck <linux@...ck-us.net>,
Rich Felker <dalias@...c.org>,
Yoshinori Sato <ysato@...rs.sourceforge.jp>,
linux-kernel@...r.kernel.org, linux-m68k@...ts.linux-m68k.org,
linux-mm@...ck.org, linux-sh@...r.kernel.org
Subject: Re: [PATCH 2/2] sh: initialize max_mapnr
On Tue, 2023-02-14 at 16:07 +0200, Mike Rapoport wrote:
> From: "Mike Rapoport (IBM)" <rppt@...nel.org>
>
> sh never initializes max_mapnr which is used by the generic
> implementation of pfn_valid().
>
> Initialize max_mapnr with set_max_mapnr() in sh::paging_init().
>
> Reported-by: Guenter Roeck <linux@...ck-us.net>
> Fixes: e5080a967785 ("mm, arch: add generic implementation of pfn_valid() for FLATMEM")
> Signed-off-by: Mike Rapoport (IBM) <rppt@...nel.org>
> ---
> arch/sh/mm/init.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
> index 506784702430..bf1b54055316 100644
> --- a/arch/sh/mm/init.c
> +++ b/arch/sh/mm/init.c
> @@ -301,6 +301,7 @@ void __init paging_init(void)
> */
> max_low_pfn = max_pfn = memblock_end_of_DRAM() >> PAGE_SHIFT;
> min_low_pfn = __MEMORY_START >> PAGE_SHIFT;
> + set_max_mapnr(max_low_pfn - min_low_pfn);
>
> nodes_clear(node_online_map);
>
Acked-by: John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>
--
.''`. John Paul Adrian Glaubitz
: :' : Debian Developer
`. `' Physicist
`- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
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