linux-kernel - [PATCH 09/15] arm64: hide unused is_valid

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Date:   Tue, 16 May 2023 18:06:36 +0200
From:   Arnd Bergmann <arnd@...nel.org>
To:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>
Cc:     Arnd Bergmann <arnd@...db.de>, Ard Biesheuvel <ardb@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Marc Zyngier <maz@...nel.org>,
        Oliver Upton <oliver.upton@...ux.dev>,
        James Morse <james.morse@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Zenghui Yu <yuzenghui@...wei.com>,
        Anshuman Khandual <anshuman.khandual@....com>,
        Kees Cook <keescook@...omium.org>,
        Suren Baghdasaryan <surenb@...gle.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-efi@...r.kernel.org, kvmarm@...ts.linux.dev
Subject: [PATCH 09/15] arm64: hide unused is_valid_bugaddr()

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

When generic BUG() support is disabled, this function has no declaration
and no callers but causes a W=1 warning:

arch/arm64/kernel/traps.c:950:5: error: no previous prototype for 'is_valid_bugaddr' [-Werror=missing-prototypes]

Add an #ifdef that matches the one around the declaration.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 arch/arm64/kernel/traps.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c
index 98898c3108b8..3f5a21e5968e 100644
--- a/arch/arm64/kernel/traps.c
+++ b/arch/arm64/kernel/traps.c
@@ -946,7 +946,7 @@ void do_serror(struct pt_regs *regs, unsigned long esr)
 }
 
 /* GENERIC_BUG traps */
-
+#ifdef CONFIG_GENERIC_BUG
 int is_valid_bugaddr(unsigned long addr)
 {
 	/*
@@ -958,6 +958,7 @@ int is_valid_bugaddr(unsigned long addr)
 	 */
 	return 1;
 }
+#endif
 
 static int bug_handler(struct pt_regs *regs, unsigned long esr)
 {
-- 
2.39.2