#ifdef CONFIG_HAVE_HW_BREAKPOINT
+extern int __init init_hw_breakpoint(void);
+
static inline void hw_breakpoint_init(struct perf_event_attr *attr)
{
memset(attr, 0, sizeof(*attr));
#else /* !CONFIG_HAVE_HW_BREAKPOINT */
+static inline int __init init_hw_breakpoint(void) { return 0; }
+
static inline struct perf_event *
register_user_hw_breakpoint(struct perf_event_attr *attr,
perf_overflow_handler_t triggered,