[merged mm-stable] m68k-nommu-add-missing-definition-of-arch_pfn_offset.patch removed from -mm tree

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The quilt patch titled
     Subject: m68k/nommu: add missing definition of ARCH_PFN_OFFSET
has been removed from the -mm tree.  Its filename was
     m68k-nommu-add-missing-definition-of-arch_pfn_offset.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: "Mike Rapoport (IBM)" <rppt@xxxxxxxxxx>
Subject: m68k/nommu: add missing definition of ARCH_PFN_OFFSET
Date: Tue, 14 Feb 2023 16:07:28 +0200

Patch series "fixups for generic implementation of pfn_valid()".

Guenter reported boot failures on m68k-nommu and sh caused by the switch to
the generic implementation of pfn_valid():

https://lore.kernel.org/all/20230212173513.GA4052259@xxxxxxxxxxxx
https://lore.kernel.org/all/20230212161320.GA3784076@xxxxxxxxxxxx

These are small fixups that address the issues.


This patch (of 2):

On m68k/nommu RAM does not necessarily start at 0x0 and when it does not
pfn_valid() uses a wrong offset into the memory map which causes silent
boot failures.

Define ARCH_PFN_OFFSET to make pfn_valid() use the correct offset.

Link: https://lkml.kernel.org/r/20230214140729.1649961-1-rppt@xxxxxxxxxx
Link: https://lkml.kernel.org/r/20230214140729.1649961-2-rppt@xxxxxxxxxx
Fixes: d82f07f06cf8 ("m68k: use asm-generic/memory_model.h for both MMU and !MMU")
Reported-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Mike Rapoport (IBM) <rppt@xxxxxxxxxx>
Acked-by: Greg Ungerer <gerg@xxxxxxxxxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Cc: Rich Felker <dalias@xxxxxxxx>
Cc: Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>
Cc: John Paul Adrian Glaubitz <glaubitz@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---


--- a/arch/m68k/include/asm/page_no.h~m68k-nommu-add-missing-definition-of-arch_pfn_offset
+++ a/arch/m68k/include/asm/page_no.h
@@ -28,6 +28,8 @@ extern unsigned long memory_end;
 #define	virt_addr_valid(kaddr)	(((unsigned long)(kaddr) >= PAGE_OFFSET) && \
 				((unsigned long)(kaddr) < memory_end))
 
+#define ARCH_PFN_OFFSET PHYS_PFN(PAGE_OFFSET_RAW)
+
 #endif /* __ASSEMBLY__ */
 
 #endif /* _M68K_PAGE_NO_H */
_

Patches currently in -mm which might be from rppt@xxxxxxxxxx are





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