1 files changed, 18 insertions, 2 deletions

diff --git a/include/linux/oprofile.h b/include/linux/oprofile.h
index 32fb81212fd1..7f5cfd3b37dd 100644
--- a/include/linux/oprofile.h
+++ b/include/linux/oprofile.h
@@ -16,6 +16,8 @@
 #include <linux/types.h>
 #include <linux/spinlock.h>
 #include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/printk.h>
 #include <asm/atomic.h>
  
 /* Each escaped entry is prefixed by ESCAPE_CODE
@@ -104,6 +106,13 @@ void oprofile_add_sample(struct pt_regs * const regs, unsigned long event);
 void oprofile_add_ext_sample(unsigned long pc, struct pt_regs * const regs,
                                 unsigned long event, int is_kernel);
 
+/**
+ * Add an hardware sample.
+ */
+void oprofile_add_ext_hw_sample(unsigned long pc, struct pt_regs * const regs,
+        unsigned long event, int is_kernel,
+        struct task_struct *task);
+
 /* Use this instead when the PC value is not from the regs. Doesn't
  * backtrace. */
 void oprofile_add_pc(unsigned long pc, int is_kernel, unsigned long event);
@@ -186,10 +195,17 @@ int oprofile_add_data(struct op_entry *entry, unsigned long val);
 int oprofile_add_data64(struct op_entry *entry, u64 val);
 int oprofile_write_commit(struct op_entry *entry);
 
-#ifdef CONFIG_PERF_EVENTS
+#ifdef CONFIG_HW_PERF_EVENTS
 int __init oprofile_perf_init(struct oprofile_operations *ops);
 void oprofile_perf_exit(void);
 char *op_name_from_perf_id(void);
-#endif /* CONFIG_PERF_EVENTS */
+#else
+static inline int __init oprofile_perf_init(struct oprofile_operations *ops)
+{
+        pr_info("oprofile: hardware counters not available\n");
+        return -ENODEV;
+}
+static inline void oprofile_perf_exit(void) { }
+#endif /* CONFIG_HW_PERF_EVENTS */
 
 #endif /* OPROFILE_H */