perf_counter: Add dummy perf_counter_print_debug function

Impact: minimize requirements on architectures

Currently, an architecture just enabling CONFIG_PERF_COUNTERS but not
providing any extra functions will fail to build with
perf_counter_print_debug being undefined, since we don't provide an
empty dummy definition like we do with the hw_perf_* functions.

This provides an empty dummy perf_counter_print_debug() to make it
easier for architectures to turn on CONFIG_PERF_COUNTERS.

Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/kernel/perf_counter.c b/kernel/perf_counter.c
index 9ad11e44d9a..4c0dccb756a 100644
--- a/kernel/perf_counter.c
+++ b/kernel/perf_counter.c
@@ -54,6 +54,8 @@ int __weak hw_perf_group_sched_in(struct perf_counter *group_leader,
         return 0;
 }
 
+void __weak perf_counter_print_debug(void)      { }
+
 static void
 list_add_counter(struct perf_counter *counter, struct perf_counter_context *ctx)
 {