The patch titled
Subject: sh: initialize max_mapnr
has been added to the -mm mm-unstable branch. Its filename is
sh-initialize-max_mapnr.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/sh-initialize-max_mapnr.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: "Mike Rapoport (IBM)" <rppt@xxxxxxxxxx>
Subject: sh: initialize max_mapnr
Date: Tue, 14 Feb 2023 16:07:29 +0200
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().
Link: https://lkml.kernel.org/r/20230214140729.1649961-3-rppt@xxxxxxxxxx
Fixes: e5080a967785 ("mm, arch: add generic implementation of pfn_valid() for FLATMEM")
Reported-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Mike Rapoport (IBM) <rppt@xxxxxxxxxx>
Acked-by: John Paul Adrian Glaubitz <glaubitz@xxxxxxxxxxxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Cc: Greg Ungerer <gerg@xxxxxxxxxxxxxx>
Cc: Rich Felker <dalias@xxxxxxxx>
Cc: Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/arch/sh/mm/init.c~sh-initialize-max_mapnr
+++ a/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);
_
Patches currently in -mm which might be from rppt@xxxxxxxxxx are
m68k-nommu-add-missing-definition-of-arch_pfn_offset.patch
sh-initialize-max_mapnr.patch
