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tracing: Remove orphaned function ftrace_nr_registered_ops()

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Remove ftrace_nr_registered_ops() because it is no longer used.

ftrace_nr_registered_ops() has been introduced by commit ea701f11da
("ftrace: Add selftest to test function trace recursion protection"), but
its caller has been removed by commit 05cbbf643b ("tracing: Fix selftest
function recursion accounting"). So it is not called anymore.

Link: http://lkml.kernel.org/r/153260907227.12474.5234899025934963683.stgit@devbox

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Masami Hiramatsu 2018-07-26 21:44:32 +09:00 committed by Steven Rostedt (VMware)
parent 7b144b6c79
commit 72809cbf67
2 changed files with 0 additions and 30 deletions
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6
include/linux/ftrace.h
View File

@ -234,10 +234,6 @@ extern void ftrace_stub(unsigned long a0, unsigned long a1,
*/
#define register_ftrace_function(ops) ({ 0; })
#define unregister_ftrace_function(ops) ({ 0; })
static inline int ftrace_nr_registered_ops(void)
{
return 0;
}
static inline void ftrace_kill(void) { }
static inline void ftrace_free_init_mem(void) { }
static inline void ftrace_free_mem(struct module *mod, void *start, void *end) { }
@ -328,8 +324,6 @@ struct seq_file;
extern int ftrace_text_reserved(const void *start, const void *end);
extern int ftrace_nr_registered_ops(void);
struct ftrace_ops *ftrace_ops_trampoline(unsigned long addr);
bool is_ftrace_trampoline(unsigned long addr);

24
kernel/trace/ftrace.c
View File

@ -157,30 +157,6 @@ static inline void ftrace_ops_init(struct ftrace_ops *ops)
#endif
}
/**
* ftrace_nr_registered_ops - return number of ops registered
*
* Returns the number of ftrace_ops registered and tracing functions
*/
int ftrace_nr_registered_ops(void)
{
struct ftrace_ops *ops;
int cnt = 0;
mutex_lock(&ftrace_lock);
for (ops = rcu_dereference_protected(ftrace_ops_list,
lockdep_is_held(&ftrace_lock));
ops != &ftrace_list_end;
ops = rcu_dereference_protected(ops->next,
lockdep_is_held(&ftrace_lock)))
cnt++;
mutex_unlock(&ftrace_lock);
return cnt;
}
static void ftrace_pid_func(unsigned long ip, unsigned long parent_ip,
struct ftrace_ops *op, struct pt_regs *regs)
{