From: Namhyung Kim <namhyung@kernel.org>
It will be used when checking graph filter hashes later.
Link: http://lkml.kernel.org/r/20170120024447.26097-2-namhyung@kernel.org
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
[ Moved ftrace_hash dec and functions outside of FUNCTION_GRAPH define ]
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
kernel/trace/ftrace.c | 14 +-------------
kernel/trace/trace.h | 16 +++++++++++++++-
2 files changed, 16 insertions(+), 14 deletions(-)
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 37b0e948d924..0470e373b9b4 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -1110,13 +1110,6 @@ struct ftrace_func_entry {
unsigned long ip;
};
-struct ftrace_hash {
- unsigned long size_bits;
- struct hlist_head *buckets;
- unsigned long count;
- struct rcu_head rcu;
-};
-
/*
* We make these constant because no one should touch them,
* but they are used as the default "empty hash", to avoid allocating
@@ -1192,12 +1185,7 @@ struct ftrace_page {
static struct ftrace_page *ftrace_pages_start;
static struct ftrace_page *ftrace_pages;
-static bool __always_inline ftrace_hash_empty(struct ftrace_hash *hash)
-{
- return !hash || !hash->count;
-}
-
-static struct ftrace_func_entry *
+struct ftrace_func_entry *
ftrace_lookup_ip(struct ftrace_hash *hash, unsigned long ip)
{
unsigned long key;
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 1ea51ab53edf..9001460291bb 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -753,6 +753,21 @@ enum print_line_t print_trace_line(struct trace_iterator *iter);
extern char trace_find_mark(unsigned long long duration);
+struct ftrace_hash {
+ unsigned long size_bits;
+ struct hlist_head *buckets;
+ unsigned long count;
+ struct rcu_head rcu;
+};
+
+struct ftrace_func_entry *
+ftrace_lookup_ip(struct ftrace_hash *hash, unsigned long ip);
+
+static bool __always_inline ftrace_hash_empty(struct ftrace_hash *hash)
+{
+ return !hash || !hash->count;
+}
+
/* Standard output formatting function used for function return traces */
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
@@ -787,7 +802,6 @@ extern void __trace_graph_return(struct trace_array *tr,
struct ftrace_graph_ret *trace,
unsigned long flags, int pc);
-
#ifdef CONFIG_DYNAMIC_FTRACE
/* TODO: make this variable */
#define FTRACE_GRAPH_MAX_FUNCS 32
--
2.10.2