linux-kernel - [PATCH] powerpc/4xx: Remove WatchdogHandler() to fix no previous prototype error

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Date:   Thu, 17 Aug 2023 14:40:49 +0200
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Michael Ellerman <mpe@...erman.id.au>,
        Nicholas Piggin <npiggin@...il.com>
Cc:     Christophe Leroy <christophe.leroy@...roup.eu>,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        Arnd Bergmann <arnd@...db.de>
Subject: [PATCH] powerpc/4xx: Remove WatchdogHandler() to fix no previous prototype error

Building ppc40x_defconfig throws the following error:

  CC      arch/powerpc/kernel/traps.o
arch/powerpc/kernel/traps.c:2232:29: warning: no previous prototype for 'WatchdogHandler' [-Wmissing-prototypes]
 2232 | void __attribute__ ((weak)) WatchdogHandler(struct pt_regs *regs)
      |                             ^~~~~~~~~~~~~~~

This function was imported by commit 14cf11af6cf6 ("powerpc: Merge
enough to start building in arch/powerpc.") as a weak function but
never defined and/or called outside traps.c

As it has only one caller fold it inside its caller and remove it.

Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
Cc: Arnd Bergmann <arnd@...db.de>
---
 arch/powerpc/kernel/traps.c | 13 +------------
 1 file changed, 1 insertion(+), 12 deletions(-)

diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index f5ce282dc4b8..eeff136b83d9 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -2225,21 +2225,10 @@ void __noreturn unrecoverable_exception(struct pt_regs *regs)
 }
 
 #if defined(CONFIG_BOOKE_WDT) || defined(CONFIG_40x)
-/*
- * Default handler for a Watchdog exception,
- * spins until a reboot occurs
- */
-void __attribute__ ((weak)) WatchdogHandler(struct pt_regs *regs)
-{
-	/* Generic WatchdogHandler, implement your own */
-	mtspr(SPRN_TCR, mfspr(SPRN_TCR)&(~TCR_WIE));
-	return;
-}
-
 DEFINE_INTERRUPT_HANDLER_NMI(WatchdogException)
 {
 	printk (KERN_EMERG "PowerPC Book-E Watchdog Exception\n");
-	WatchdogHandler(regs);
+	mtspr(SPRN_TCR, mfspr(SPRN_TCR) & ~TCR_WIE);
 	return 0;
 }
 #endif
-- 
2.41.0