+ m68k-use-asm-generic-memory_modelh-for-both-mmu-and-mmu.patch added to mm-unstable branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: m68k: use asm-generic/memory_model.h for both MMU and !MMU
has been added to the -mm mm-unstable branch.  Its filename is
     m68k-use-asm-generic-memory_modelh-for-both-mmu-and-mmu.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/m68k-use-asm-generic-memory_modelh-for-both-mmu-and-mmu.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@kernel.org>
Subject: m68k: use asm-generic/memory_model.h for both MMU and !MMU
Date: Wed, 25 Jan 2023 21:07:55 +0200

Patch series "mm, arch: add generic implementation of pfn_valid() for
FLATMEM".

Every architecture that supports FLATMEM memory model defines its own
version of pfn_valid() that essentially compares a pfn to max_mapnr.

Use mips/powerpc version implemented as static inline as a generic
implementation of pfn_valid() and drop its per-architecture definitions


This patch (of 3):

The MMU variant uses generic definitions of page_to_pfn() and
pfn_to_page(), but !MMU defines them in include/asm/page_no.h for no good
reason.

Include asm-generic/memory_model.h in the common include/asm/page.h and
drop redundant definitions.

Link: https://lkml.kernel.org/r/20230125190757.22555-1-rppt@kernel.org
Link: https://lkml.kernel.org/r/20230125190757.22555-2-rppt@kernel.org
Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Brian Cain <bcain@quicinc.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Dinh Nguyen <dinguyen@kernel.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: Guo Ren <guoren@kernel.org>
Cc: Helge Deller <deller@gmx.de>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rich Felker <dalias@libc.org>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Vineet Gupta <vgupta@kernel.org>
Cc: WANG Xuerui <kernel@xen0n.name>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---


--- a/arch/m68k/include/asm/page.h~m68k-use-asm-generic-memory_modelh-for-both-mmu-and-mmu
+++ a/arch/m68k/include/asm/page.h
@@ -62,11 +62,7 @@ extern unsigned long _ramend;
 #include <asm/page_no.h>
 #endif
 
-#ifndef CONFIG_MMU
-#define __phys_to_pfn(paddr)	((unsigned long)((paddr) >> PAGE_SHIFT))
-#define __pfn_to_phys(pfn)	PFN_PHYS(pfn)
-#endif
-
 #include <asm-generic/getorder.h>
+#include <asm-generic/memory_model.h>
 
 #endif /* _M68K_PAGE_H */
--- a/arch/m68k/include/asm/page_mm.h~m68k-use-asm-generic-memory_modelh-for-both-mmu-and-mmu
+++ a/arch/m68k/include/asm/page_mm.h
@@ -134,7 +134,6 @@ extern int m68k_virt_to_node_shift;
 })
 
 #define ARCH_PFN_OFFSET (m68k_memory[0].addr >> PAGE_SHIFT)
-#include <asm-generic/memory_model.h>
 
 #define virt_addr_valid(kaddr)	((unsigned long)(kaddr) >= PAGE_OFFSET && (unsigned long)(kaddr) < (unsigned long)high_memory)
 #define pfn_valid(pfn)		virt_addr_valid(pfn_to_virt(pfn))
--- a/arch/m68k/include/asm/page_no.h~m68k-use-asm-generic-memory_modelh-for-both-mmu-and-mmu
+++ a/arch/m68k/include/asm/page_no.h
@@ -25,8 +25,6 @@ extern unsigned long memory_end;
 #define virt_to_page(addr)	(mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
 #define page_to_virt(page)	__va(((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET))
 
-#define pfn_to_page(pfn)	virt_to_page(pfn_to_virt(pfn))
-#define page_to_pfn(page)	virt_to_pfn(page_to_virt(page))
 #define pfn_valid(pfn)	        ((pfn) < max_mapnr)
 
 #define	virt_addr_valid(kaddr)	(((unsigned long)(kaddr) >= PAGE_OFFSET) && \
_

Patches currently in -mm which might be from rppt@kernel.org are

mm-sparse-fix-unused-function-pgdat_to_phys-warning.patch
m68k-use-asm-generic-memory_modelh-for-both-mmu-and-mmu.patch
mips-drop-definition-of-pfn_valid-for-discontigmem.patch
mm-arch-add-generic-implementation-of-pfn_valid-for-flatmem.patch