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Subject[PATCH 19/21] powerpc: Add missing prototypes for hw_breakpoint_handler & arch_unregister_hw_breakpoint
In commit 5aae8a537080 ("powerpc, hw_breakpoints: Implement hw_breakpoints
for 64-bit server processors") function hw_breakpoint_handler and
arch_unregister_hw_breakpoint were added without function prototypes in
hw_breakpoint.h header.

Fix the following warning(s) (treated as error in W=1):

AR init/built-in.o
arch/powerpc/kernel/hw_breakpoint.c:106:6: error: no previous prototype for ‘arch_unregister_hw_breakpoint’ [-Werror=missing-prototypes]
void arch_unregister_hw_breakpoint(struct perf_event *bp)
arch/powerpc/kernel/hw_breakpoint.c:209:5: error: no previous prototype for ‘hw_breakpoint_handler’ [-Werror=missing-prototypes]
int hw_breakpoint_handler(struct die_args *args)
cc1: all warnings being treated as errors

Signed-off-by: Mathieu Malaterre <>
arch/powerpc/include/asm/hw_breakpoint.h | 2 ++
1 file changed, 2 insertions(+)

diff --git a/arch/powerpc/include/asm/hw_breakpoint.h b/arch/powerpc/include/asm/hw_breakpoint.h
index ac6432d9be46..90c708e5e7c4 100644
--- a/arch/powerpc/include/asm/hw_breakpoint.h
+++ b/arch/powerpc/include/asm/hw_breakpoint.h
@@ -66,6 +66,7 @@ extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
unsigned long val, void *data);
int arch_install_hw_breakpoint(struct perf_event *bp);
void arch_uninstall_hw_breakpoint(struct perf_event *bp);
+void arch_unregister_hw_breakpoint(struct perf_event *bp);
void hw_breakpoint_pmu_read(struct perf_event *bp);
extern void flush_ptrace_hw_breakpoint(struct task_struct *tsk);

@@ -82,6 +83,7 @@ static inline void hw_breakpoint_disable(void)
extern void thread_change_pc(struct task_struct *tsk, struct pt_regs *regs);
+int hw_breakpoint_handler(struct die_args *args);

static inline void hw_breakpoint_disable(void) { }
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