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authorSteven Rostedt (Red Hat) <rostedt@goodmis.org>2015-09-28 10:11:44 -0400
committerSteven Rostedt <rostedt@goodmis.org>2015-09-28 10:11:44 -0400
commit6b1032d53cdbda39ad56c8692bac17a66475b57d (patch)
tree3e5524913fdcdbbe49e62a3dd581842e60483c89 /kernel/trace/trace_output.c
parentca475e831fd59e131bccd60de43c4104d82d02f5 (diff)
downloadlinux-6b1032d53cdbda39ad56c8692bac17a66475b57d.tar.bz2
tracing: Inject seq_print_userip_objs() into its only user
seq_print_userip_objs() is used only in one location, in one file. Instead of having it as an external function, go one further than making it static, but inject is code into its only user. It doesn't make the calling function much more complex. Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace_output.c')
-rw-r--r--kernel/trace/trace_output.c81
1 files changed, 36 insertions, 45 deletions
diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index 8e481a84aeea..881cbdae1913 100644
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -355,50 +355,6 @@ int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
}
int
-seq_print_userip_objs(const struct userstack_entry *entry, struct trace_seq *s,
- unsigned long sym_flags)
-{
- struct mm_struct *mm = NULL;
- unsigned int i;
-
- if (trace_flags & TRACE_ITER_SYM_USEROBJ) {
- struct task_struct *task;
- /*
- * we do the lookup on the thread group leader,
- * since individual threads might have already quit!
- */
- rcu_read_lock();
- task = find_task_by_vpid(entry->tgid);
- if (task)
- mm = get_task_mm(task);
- rcu_read_unlock();
- }
-
- for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
- unsigned long ip = entry->caller[i];
-
- if (ip == ULONG_MAX || trace_seq_has_overflowed(s))
- break;
-
- trace_seq_puts(s, " => ");
-
- if (!ip) {
- trace_seq_puts(s, "??");
- trace_seq_putc(s, '\n');
- continue;
- }
-
- seq_print_user_ip(s, mm, ip, sym_flags);
- trace_seq_putc(s, '\n');
- }
-
- if (mm)
- mmput(mm);
-
- return !trace_seq_has_overflowed(s);
-}
-
-int
seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags)
{
if (!ip) {
@@ -1081,11 +1037,46 @@ static enum print_line_t trace_user_stack_print(struct trace_iterator *iter,
{
struct userstack_entry *field;
struct trace_seq *s = &iter->seq;
+ struct mm_struct *mm = NULL;
+ unsigned int i;
trace_assign_type(field, iter->ent);
trace_seq_puts(s, "<user stack trace>\n");
- seq_print_userip_objs(field, s, flags);
+
+ if (trace_flags & TRACE_ITER_SYM_USEROBJ) {
+ struct task_struct *task;
+ /*
+ * we do the lookup on the thread group leader,
+ * since individual threads might have already quit!
+ */
+ rcu_read_lock();
+ task = find_task_by_vpid(field->tgid);
+ if (task)
+ mm = get_task_mm(task);
+ rcu_read_unlock();
+ }
+
+ for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
+ unsigned long ip = field->caller[i];
+
+ if (ip == ULONG_MAX || trace_seq_has_overflowed(s))
+ break;
+
+ trace_seq_puts(s, " => ");
+
+ if (!ip) {
+ trace_seq_puts(s, "??");
+ trace_seq_putc(s, '\n');
+ continue;
+ }
+
+ seq_print_user_ip(s, mm, ip, flags);
+ trace_seq_putc(s, '\n');
+ }
+
+ if (mm)
+ mmput(mm);
return trace_handle_return(s);
}