[RFC 05/10] ftrace: Export some of hash related functions

[Jiri Olsa]

We are going to use these functions in following changes.

Signed-off-by: Jiri Olsa <jo...@kernel.org>
---
 include/linux/ftrace.h | 16 ++++++++++++++++
 kernel/trace/ftrace.c  |  7 +++----
 kernel/trace/trace.h   |  8 --------
 3 files changed, 19 insertions(+), 12 deletions(-)

diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index 8761765d9abc..9a6fcdafeda2 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -397,6 +397,22 @@ enum ftrace_ops_cmd {
 typedef int (*ftrace_ops_func_t)(struct ftrace_ops *op, enum ftrace_ops_cmd 
cmd);
 
 #ifdef CONFIG_DYNAMIC_FTRACE
+
+#define FTRACE_HASH_DEFAULT_BITS 10
+
+struct ftrace_hash {
+       unsigned long           size_bits;
+       struct hlist_head       *buckets;
+       unsigned long           count;
+       unsigned long           flags;
+       struct rcu_head         rcu;
+};
+
+struct ftrace_hash *alloc_ftrace_hash(int size_bits);
+void free_ftrace_hash(struct ftrace_hash *hash);
+struct ftrace_func_entry *add_hash_entry_direct(struct ftrace_hash *hash,
+                                               unsigned long ip, unsigned long 
direct);
+
 /* The hash used to know what functions callbacks trace */
 struct ftrace_ops_hash {
        struct ftrace_hash __rcu        *notrace_hash;
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 755d5550ac44..fcb8f2d3172b 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -68,7 +68,6 @@
        })
 
 /* hash bits for specific function selection */
-#define FTRACE_HASH_DEFAULT_BITS 10
 #define FTRACE_HASH_MAX_BITS 12
 
 #ifdef CONFIG_DYNAMIC_FTRACE
@@ -1189,7 +1188,7 @@ static void __add_hash_entry(struct ftrace_hash *hash,
        hash->count++;
 }
 
-static struct ftrace_func_entry *
+struct ftrace_func_entry *
 add_hash_entry_direct(struct ftrace_hash *hash, unsigned long ip, unsigned 
long direct)
 {
        struct ftrace_func_entry *entry;
@@ -1269,7 +1268,7 @@ static void clear_ftrace_mod_list(struct list_head *head)
        mutex_unlock(&ftrace_lock);
 }
 
-static void free_ftrace_hash(struct ftrace_hash *hash)
+void free_ftrace_hash(struct ftrace_hash *hash)
 {
        if (!hash || hash == EMPTY_HASH)
                return;
@@ -1309,7 +1308,7 @@ void ftrace_free_filter(struct ftrace_ops *ops)
 }
 EXPORT_SYMBOL_GPL(ftrace_free_filter);
 
-static struct ftrace_hash *alloc_ftrace_hash(int size_bits)
+struct ftrace_hash *alloc_ftrace_hash(int size_bits)
 {
        struct ftrace_hash *hash;
        int size;
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index bd084953a98b..74ef7755f361 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -899,14 +899,6 @@ enum {
        FTRACE_HASH_FL_MOD      = (1 << 0),
 };
 
-struct ftrace_hash {
-       unsigned long           size_bits;
-       struct hlist_head       *buckets;
-       unsigned long           count;
-       unsigned long           flags;
-       struct rcu_head         rcu;
-};
-
 struct ftrace_func_entry *
 ftrace_lookup_ip(struct ftrace_hash *hash, unsigned long ip);
 
-- 
2.50.1