linux-kernel - [PATCH v2 13/52] m68k: mm: Add and use "fault.h"

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Date:   Wed, 13 Sep 2023 16:08:03 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     linux-m68k@...ts.linux-m68k.org
Cc:     Arnd Bergmann <arnd@...db.de>, Finn Thain <fthain@...ux-m68k.org>,
        Michael Schmitz <schmitzmic@...il.com>,
        Philip Blundell <philb@....org>,
        Greg Ungerer <gerg@...ux-m68k.org>,
        Joshua Thompson <funaho@...ai.org>,
        Sam Creasey <sammy@...my.net>,
        Laurent Vivier <laurent@...ier.eu>,
        linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: [PATCH v2 13/52] m68k: mm: Add and use "fault.h"

When building with W=1:

    arch/m68k/mm/fault.c:22:5: warning: no previous prototype for ‘send_fault_sig’ [-Wmissing-prototypes]
       22 | int send_fault_sig(struct pt_regs *regs)
	  |     ^~~~~~~~~~~~~~
    arch/m68k/mm/fault.c:68:5: warning: no previous prototype for ‘do_page_fault’ [-Wmissing-prototypes]
       68 | int do_page_fault(struct pt_regs *regs, unsigned long address,
	  |     ^~~~~~~~~~~~~

Fix this by introducing a new header file "fault.h" for holding the
prototypes of functions implemented in arch/m68k/mm/fault.c.

Signed-off-by: Geert Uytterhoeven <geert@...ux-m68k.org>
Acked-by: Arnd Bergmann <arnd@...db.de>
---
v2:
  - Add Acked-by.
---
 arch/m68k/kernel/sys_m68k.c | 3 +--
 arch/m68k/kernel/traps.c    | 5 +----
 arch/m68k/mm/fault.c        | 2 ++
 arch/m68k/mm/fault.h        | 7 +++++++
 4 files changed, 11 insertions(+), 6 deletions(-)
 create mode 100644 arch/m68k/mm/fault.h

diff --git a/arch/m68k/kernel/sys_m68k.c b/arch/m68k/kernel/sys_m68k.c
index 14055d676161d725..1af5e60824676bf3 100644
--- a/arch/m68k/kernel/sys_m68k.c
+++ b/arch/m68k/kernel/sys_m68k.c
@@ -35,8 +35,7 @@
 
 #include <asm/tlb.h>
 
-asmlinkage int do_page_fault(struct pt_regs *regs, unsigned long address,
-			     unsigned long error_code);
+#include "../mm/fault.h"
 
 asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
 	unsigned long prot, unsigned long flags,
diff --git a/arch/m68k/kernel/traps.c b/arch/m68k/kernel/traps.c
index d408334712f7118b..129c89349e1a40aa 100644
--- a/arch/m68k/kernel/traps.c
+++ b/arch/m68k/kernel/traps.c
@@ -42,6 +42,7 @@
 #include <asm/tlbflush.h>
 
 #include "traps.h"
+#include "../mm/fault.h"
 
 static const char *vec_names[] = {
 	[VEC_RESETSP]	= "RESET SP",
@@ -126,10 +127,6 @@ static const char *space_names[] = {
 };
 
 void die_if_kernel(char *,struct pt_regs *,int);
-asmlinkage int do_page_fault(struct pt_regs *regs, unsigned long address,
-                             unsigned long error_code);
-int send_fault_sig(struct pt_regs *regs);
-
 asmlinkage void trap_c(struct frame *fp);
 
 #if defined (CONFIG_M68060)
diff --git a/arch/m68k/mm/fault.c b/arch/m68k/mm/fault.c
index c290c5c0cfb93a81..fa3c5f38d9894c08 100644
--- a/arch/m68k/mm/fault.c
+++ b/arch/m68k/mm/fault.c
@@ -17,6 +17,8 @@
 #include <asm/setup.h>
 #include <asm/traps.h>
 
+#include "fault.h"
+
 extern void die_if_kernel(char *, struct pt_regs *, long);
 
 int send_fault_sig(struct pt_regs *regs)
diff --git a/arch/m68k/mm/fault.h b/arch/m68k/mm/fault.h
new file mode 100644
index 0000000000000000..dab14ef7d4a171d5
--- /dev/null
+++ b/arch/m68k/mm/fault.h
@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+struct pt_regs;
+
+int do_page_fault(struct pt_regs *regs, unsigned long address,
+		  unsigned long error_code);
+int send_fault_sig(struct pt_regs *regs);
-- 
2.34.1