linux-kernel - [PATCH 04/15] arm64: move cpu_suspend_set_dbg

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Message-Id: <20230516160642.523862-5-arnd@kernel.org>
Date:   Tue, 16 May 2023 18:06:31 +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 04/15] arm64: move cpu_suspend_set_dbg_restorer() prototype to header

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

The cpu_suspend_set_dbg_restorer() function is called by the hw_breakpoint
code but defined in another file. Since the declaration is in the
same file as the caller, the compiler warns about the definition
without a prior prototype:

arch/arm64/kernel/suspend.c:35:13: error: no previous prototype for 'cpu_suspend_set_dbg_restorer' [-Werror=missing-prototypes]

Move it into the corresponding header instead to avoid the warning.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 arch/arm64/include/asm/hw_breakpoint.h | 8 ++++++++
 arch/arm64/kernel/hw_breakpoint.c      | 8 --------
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/arch/arm64/include/asm/hw_breakpoint.h b/arch/arm64/include/asm/hw_breakpoint.h
index fa4c6ff3aa9b..84055329cd8b 100644
--- a/arch/arm64/include/asm/hw_breakpoint.h
+++ b/arch/arm64/include/asm/hw_breakpoint.h
@@ -154,4 +154,12 @@ static inline int get_num_wrps(void)
 						ID_AA64DFR0_EL1_WRPs_SHIFT);
 }
 
+#ifdef CONFIG_CPU_PM
+extern void cpu_suspend_set_dbg_restorer(int (*hw_bp_restore)(unsigned int));
+#else
+static inline void cpu_suspend_set_dbg_restorer(int (*hw_bp_restore)(unsigned int))
+{
+}
+#endif
+
 #endif	/* __ASM_BREAKPOINT_H */
diff --git a/arch/arm64/kernel/hw_breakpoint.c b/arch/arm64/kernel/hw_breakpoint.c
index b29a311bb055..db2a1861bb97 100644
--- a/arch/arm64/kernel/hw_breakpoint.c
+++ b/arch/arm64/kernel/hw_breakpoint.c
@@ -973,14 +973,6 @@ static int hw_breakpoint_reset(unsigned int cpu)
 	return 0;
 }
 
-#ifdef CONFIG_CPU_PM
-extern void cpu_suspend_set_dbg_restorer(int (*hw_bp_restore)(unsigned int));
-#else
-static inline void cpu_suspend_set_dbg_restorer(int (*hw_bp_restore)(unsigned int))
-{
-}
-#endif
-
 /*
  * One-time initialisation.
  */
-- 
2.39.2