ftrace: Add ftrace_hash_count function

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

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20260606123955.345967-2-jolsa@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index 28b30c6f10314dfeef0b6e047fbbdc36a06ecb7c..02c24bf766cedc4fa0421f9f33554333b89b4db2 100644 (file)
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -551,6 +551,8 @@ int update_ftrace_direct_mod(struct ftrace_ops *ops, struct ftrace_hash *hash, b
 
 void ftrace_stub_direct_tramp(void);
 
+unsigned long ftrace_hash_count(struct ftrace_hash *hash);
+
 #else
 struct ftrace_ops;
 static inline unsigned long ftrace_find_rec_direct(unsigned long ip)
@@ -590,6 +592,11 @@ static inline int update_ftrace_direct_mod(struct ftrace_ops *ops, struct ftrace
        return -ENODEV;
 }
 
+static inline unsigned long ftrace_hash_count(struct ftrace_hash *hash)
+{
+       return 0;
+}
+
 /*
  * This must be implemented by the architecture.
  * It is the way the ftrace direct_ops helper, when called

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index b2611de3f5943b4d1266b13fa11ad66f08210677..57ab01fd00bda3bafa472c2b4b788aed7e43bc0b 100644 (file)
--- 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