[PATCH 19/21] powerpc: Add missing prototypes for hw_breakpoint_handler & arch_unregister_hw_breakpoint

[Mathieu Malaterre]

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 âarch_unregister_hw_breakpointâ [-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 âhw_breakpoint_handlerâ [-Werror=missing-prototypes]
 int hw_breakpoint_handler(struct die_args *args)
     ^~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors

Signed-off-by: Mathieu Malaterre <malat@xxxxxxxxxx>
---
 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)
 	__set_breakpoint(&brk);
 }
 extern void thread_change_pc(struct task_struct *tsk, struct pt_regs *regs);
+int hw_breakpoint_handler(struct die_args *args);
 
 #else	/* CONFIG_HAVE_HW_BREAKPOINT */
 static inline void hw_breakpoint_disable(void) { }
-- 
2.11.0