tracing: Use generic type for comparator function

Comparator function type, cmp_func_t, is defined in the types.h, use it in the code. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Andy Shevchenko <[email protected]> Signed-off-by: Steven Rostedt (VMware) <[email protected]>
ferruhy · Nov 14, 2019 · 80042c8 · 80042c8
1 parent e8877ec
commit 80042c8
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Showing 4 changed files with 13 additions and 15 deletions.
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
@@ -465,10 +465,10 @@ static void *function_stat_start(struct tracer_stat *trace)
 
 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
 /* function graph compares on total time */
-static int function_stat_cmp(void *p1, void *p2)
+static int function_stat_cmp(const void *p1, const void *p2)
 {
-	struct ftrace_profile *a = p1;
-	struct ftrace_profile *b = p2;
+	const struct ftrace_profile *a = p1;
+	const struct ftrace_profile *b = p2;
 
 	if (a->time < b->time)
 		return -1;
@@ -479,10 +479,10 @@ static int function_stat_cmp(void *p1, void *p2)
 }
 #else
 /* not function graph compares against hits */
-static int function_stat_cmp(void *p1, void *p2)
+static int function_stat_cmp(const void *p1, const void *p2)
 {
-	struct ftrace_profile *a = p1;
-	struct ftrace_profile *b = p2;
+	const struct ftrace_profile *a = p1;
+	const struct ftrace_profile *b = p2;
 
 	if (a->counter < b->counter)
 		return -1;

diff --git a/kernel/trace/trace_branch.c b/kernel/trace/trace_branch.c
@@ -244,7 +244,7 @@ static int annotated_branch_stat_headers(struct seq_file *m)
 	return 0;
 }
 
-static inline long get_incorrect_percent(struct ftrace_branch_data *p)
+static inline long get_incorrect_percent(const struct ftrace_branch_data *p)
 {
 	long percent;
 
@@ -332,10 +332,10 @@ annotated_branch_stat_next(void *v, int idx)
 	return p;
 }
 
-static int annotated_branch_stat_cmp(void *p1, void *p2)
+static int annotated_branch_stat_cmp(const void *p1, const void *p2)
 {
-	struct ftrace_branch_data *a = p1;
-	struct ftrace_branch_data *b = p2;
+	const struct ftrace_branch_data *a = p1;
+	const struct ftrace_branch_data *b = p2;
 
 	long percent_a, percent_b;
 

diff --git a/kernel/trace/trace_stat.c b/kernel/trace/trace_stat.c
@@ -72,9 +72,7 @@ static void destroy_session(struct stat_session *session)
 	kfree(session);
 }
 
-typedef int (*cmp_stat_t)(void *, void *);
-
-static int insert_stat(struct rb_root *root, void *stat, cmp_stat_t cmp)
+static int insert_stat(struct rb_root *root, void *stat, cmp_func_t cmp)
 {
 	struct rb_node **new = &(root->rb_node), *parent = NULL;
 	struct stat_node *data;
@@ -112,7 +110,7 @@ static int insert_stat(struct rb_root *root, void *stat, cmp_stat_t cmp)
  * This one will force an insertion as right-most node
  * in the rbtree.
  */
-static int dummy_cmp(void *p1, void *p2)
+static int dummy_cmp(const void *p1, const void *p2)
 {
 	return -1;
 }

diff --git a/kernel/trace/trace_stat.h b/kernel/trace/trace_stat.h
@@ -16,7 +16,7 @@ struct tracer_stat {
 	void			*(*stat_start)(struct tracer_stat *trace);
 	void			*(*stat_next)(void *prev, int idx);
 	/* Compare two entries for stats sorting */
-	int			(*stat_cmp)(void *p1, void *p2);
+	cmp_func_t		stat_cmp;
 	/* Print a stat entry */
 	int			(*stat_show)(struct seq_file *s, void *p);
 	/* Release an entry */