1 files changed, 9 insertions, 0 deletions

diff --git a/arch/x86/oprofile/op_x86_model.h b/arch/x86/oprofile/op_x86_model.h
index 59fa2bdb0da3..ff82a755edd4 100644
--- a/arch/x86/oprofile/op_x86_model.h
+++ b/arch/x86/oprofile/op_x86_model.h
@@ -59,6 +59,15 @@ struct op_counter_config;
 
 static inline void op_x86_warn_in_use(int counter)
 {
+        /*
+         * The warning indicates an already running counter. If
+         * oprofile doesn't collect data, then try using a different
+         * performance counter on your platform to monitor the desired
+         * event. Delete counter #%d from the desired event by editing
+         * the /usr/share/oprofile/%s/<cpu>/events file. If the event
+         * cannot be monitored by any other counter, contact your
+         * hardware or BIOS vendor.
+         */
         pr_warning("oprofile: counter #%d on cpu #%d may already be used\n",
                    counter, smp_processor_id());
 }