[PATCH] hw_breakpoint: Fix build warnings with clang

[Ravi Bangoria]

kbuild test robot reported few build warnings with hw_breakpoint code
when compiled with clang[1]. Fix those.

[1]: https://lore.kernel.org/linuxppc-dev/202005192233.oi9CjRtA%25lkp@intel.com/

Reported-by: kbuild test robot <lkp at intel.com>
Signed-off-by: Ravi Bangoria <ravi.bangoria at linux.ibm.com>
---
Note: Prepared on top of powerpc/next.

 arch/powerpc/include/asm/hw_breakpoint.h | 3 ---
 include/linux/hw_breakpoint.h            | 4 ++++
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/include/asm/hw_breakpoint.h b/arch/powerpc/include/asm/hw_breakpoint.h
index f42a55eb77d2..cb424799da0d 100644
--- a/arch/powerpc/include/asm/hw_breakpoint.h
+++ b/arch/powerpc/include/asm/hw_breakpoint.h
@@ -70,9 +70,6 @@ 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);
-int arch_reserve_bp_slot(struct perf_event *bp);
-void arch_release_bp_slot(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);
 
diff --git a/include/linux/hw_breakpoint.h b/include/linux/hw_breakpoint.h
index 6058c3844a76..521481f0d320 100644
--- a/include/linux/hw_breakpoint.h
+++ b/include/linux/hw_breakpoint.h
@@ -80,6 +80,10 @@ extern int dbg_reserve_bp_slot(struct perf_event *bp);
 extern int dbg_release_bp_slot(struct perf_event *bp);
 extern int reserve_bp_slot(struct perf_event *bp);
 extern void release_bp_slot(struct perf_event *bp);
+extern int hw_breakpoint_weight(struct perf_event *bp);
+extern int arch_reserve_bp_slot(struct perf_event *bp);
+extern void arch_release_bp_slot(struct perf_event *bp);
+extern void arch_unregister_hw_breakpoint(struct perf_event *bp);
 
 extern void flush_ptrace_hw_breakpoint(struct task_struct *tsk);
 
-- 
2.26.2