linux-kernel - [PATCH 1/2] m68k: define __div64

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Date:   Wed,  9 Aug 2023 23:10:49 +0200
From:   Arnd Bergmann <arnd@...nel.org>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Arnd Bergmann <arnd@...db.de>, linux-m68k@...ts.linux-m68k.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] m68k: define __div64_32() to avoid a warning

From: Arnd Bergmann <arnd@...db.de>

The generic __div64_32() definition is built on all architectures that don't
provide this as a macro. m68k however neither defines nor requires __div64_32,
so it should define an empty one to avoid the warning:

lib/math/div64.c:31:32: error: no previous prototype for '__div64_32' [-Werror=missing-prototypes]

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 arch/m68k/include/asm/div64.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/m68k/include/asm/div64.h b/arch/m68k/include/asm/div64.h
index 365f39f5e256f..df1f6b450cc51 100644
--- a/arch/m68k/include/asm/div64.h
+++ b/arch/m68k/include/asm/div64.h
@@ -31,6 +31,9 @@
 	__rem;							\
 })
 
+/* defining this stops the unused helper function from being built */
+#define __div64_32 __div64_32
+
 #endif /* CONFIG_CPU_HAS_NO_MULDIV64 */
 
 #endif /* _M68K_DIV64_H */
-- 
2.39.2