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function_graph: Make ftrace_push_return_trace() static

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As all architectures now call function_graph_enter() to do the entry work,
no architecture should ever call ftrace_push_return_trace(). Make it static.

This is needed to prepare for a fix of a design bug on how the curr_ret_stack
is used.

Cc: stable@kernel.org
Fixes: 03274a3ffb ("tracing/fgraph: Adjust fgraph depth before calling trace return callback")
Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt (VMware) 2018-11-19 07:40:39 -05:00
parent 9c4bf5e0db
commit d125f3f866
2 changed files with 1 additions and 4 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

3
include/linux/ftrace.h
View file

@ -776,9 +776,6 @@ struct ftrace_ret_stack {
*/ */
extern void return_to_handler(void); extern void return_to_handler(void);
extern int
ftrace_push_return_trace(unsigned long ret, unsigned long func, int *depth,
unsigned long frame_pointer, unsigned long *retp);
extern int extern int
function_graph_enter(unsigned long ret, unsigned long func, function_graph_enter(unsigned long ret, unsigned long func,
unsigned long frame_pointer, unsigned long *retp); unsigned long frame_pointer, unsigned long *retp);

2
kernel/trace/trace_functions_graph.c
View file

@ -118,7 +118,7 @@ print_graph_duration(struct trace_array *tr, unsigned long long duration,
struct trace_seq *s, u32 flags); struct trace_seq *s, u32 flags);
/* Add a function return address to the trace stack on thread info.*/ /* Add a function return address to the trace stack on thread info.*/
int static int
ftrace_push_return_trace(unsigned long ret, unsigned long func, int *depth, ftrace_push_return_trace(unsigned long ret, unsigned long func, int *depth,
unsigned long frame_pointer, unsigned long *retp) unsigned long frame_pointer, unsigned long *retp)
{ {