[PATCH v2 12/52] m68k: mm: Move paging_init() to common <asm/pgtable.h>

[Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>]

When building with W=1:

    arch/m68k/mm/motorola.c:414:13: warning: no previous prototype for ‘paging_init’ [-Wmissing-prototypes]
      414 | void __init paging_init(void)
	  |             ^~~~~~~~~~~
    arch/m68k/mm/sun3mmu.c:36:13: warning: no previous prototype for ‘paging_init’ [-Wmissing-prototypes]
       36 | void __init paging_init(void)
	  |             ^~~~~~~~~~~

Fix this by consolidating the multiple prototypes into the common
<asm/pgtable.h>.

Signed-off-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Acked-by: Arnd Bergmann <arnd@xxxxxxxx>
---
v2:
  - Add Acked-by.
---
 arch/m68k/include/asm/pgtable.h    | 9 +++++++++
 arch/m68k/include/asm/pgtable_no.h | 1 -
 arch/m68k/kernel/setup_mm.c        | 2 --
 3 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/arch/m68k/include/asm/pgtable.h b/arch/m68k/include/asm/pgtable.h
index ad15d655a9bfb3b5..27525c6a12fd0c7f 100644
--- a/arch/m68k/include/asm/pgtable.h
+++ b/arch/m68k/include/asm/pgtable.h
@@ -1,6 +1,15 @@
 /* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __M68K_PGTABLE_H
+#define __M68K_PGTABLE_H
+
 #ifdef __uClinux__
 #include <asm/pgtable_no.h>
 #else
 #include <asm/pgtable_mm.h>
 #endif
+
+#ifndef __ASSEMBLY__
+extern void paging_init(void);
+#endif
+
+#endif /* __M68K_PGTABLE_H */
diff --git a/arch/m68k/include/asm/pgtable_no.h b/arch/m68k/include/asm/pgtable_no.h
index fc044df52b96c149..1a86c15b9008f03d 100644
--- a/arch/m68k/include/asm/pgtable_no.h
+++ b/arch/m68k/include/asm/pgtable_no.h
@@ -28,7 +28,6 @@
 #define PAGE_READONLY	__pgprot(0)
 #define PAGE_KERNEL	__pgprot(0)
 
-extern void paging_init(void);
 #define swapper_pg_dir ((pgd_t *) 0)
 
 /*
diff --git a/arch/m68k/kernel/setup_mm.c b/arch/m68k/kernel/setup_mm.c
index 6f1ae01f322cf231..10310b04f77d8d79 100644
--- a/arch/m68k/kernel/setup_mm.c
+++ b/arch/m68k/kernel/setup_mm.c
@@ -107,8 +107,6 @@ EXPORT_SYMBOL(isa_sex);
 
 #define MASK_256K 0xfffc0000
 
-extern void paging_init(void);
-
 static void __init m68k_parse_bootinfo(const struct bi_record *record)
 {
 	const struct bi_record *first_record = record;
-- 
2.34.1