[PATCHv3 bpf-next 01/24] ftrace: Add ftrace_hash_count function

[Jiri Olsa <jolsa@kernel.org>]

Adding external ftrace_hash_count function so we could get hash
count outside of ftrace object.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
 include/linux/ftrace.h | 1 +
 kernel/trace/ftrace.c  | 7 ++++++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index c242fe49af4c..401f8dfd05d3 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -415,6 +415,7 @@ struct ftrace_hash *alloc_ftrace_hash(int size_bits);
 void free_ftrace_hash(struct ftrace_hash *hash);
 struct ftrace_func_entry *add_ftrace_hash_entry_direct(struct ftrace_hash *hash,
 						       unsigned long ip, unsigned long direct);
+unsigned long ftrace_hash_count(struct ftrace_hash *hash);
 
 /* The hash used to know what functions callbacks trace */
 struct ftrace_ops_hash {
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 71dcbfeac86c..2240c38e7216 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -6288,11 +6288,16 @@ int modify_ftrace_direct(struct ftrace_ops *ops, unsigned long addr)
 }
 EXPORT_SYMBOL_GPL(modify_ftrace_direct);
 
-static unsigned long hash_count(struct ftrace_hash *hash)
+static inline unsigned long hash_count(struct ftrace_hash *hash)
 {
 	return hash ? hash->count : 0;
 }
 
+unsigned long ftrace_hash_count(struct ftrace_hash *hash)
+{
+	return hash_count(hash);
+}
+
 /**
  * hash_add - adds two struct ftrace_hash and returns the result
  * @a: struct ftrace_hash object
-- 
2.53.0