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b4fb12e6c7
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@kernel.org Fixes: e5080a967785 ("mm, arch: add generic implementation of pfn_valid() for FLATMEM") Reported-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org> Acked-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Reviewed-by: David Hildenbrand <david@redhat.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Greg Ungerer <gerg@linux-m68k.org> Cc: Rich Felker <dalias@libc.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>