commit 3a81a5210b7d33bb6d836b4c4952a54166a336f3
author Steven Rostedt (Red Hat) <rostedt@goodmis.org> Mon Nov 11 11:47:06 2013 -0500
committer Steven Rostedt <rostedt@goodmis.org> Mon Nov 11 11:47:06 2013 -0500
tree 2aaf3a8773715709df30ae6acf9a5a8a61214929
parent 6fc84ea70eae478099c866ace022ecfdef998032

tracing: Add rcu annotation for syscall trace descriptors

sparse complains about the enter/exit_sysycall_files[] variables being
dereferenced with rcu_dereference_sched(). The fields need to be
annotated with __rcu.

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

kernel/trace/trace.h

diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 11a04d6..7ca1993 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -192,8 +192,8 @@
 #ifdef CONFIG_FTRACE_SYSCALLS
 	int			sys_refcount_enter;
 	int			sys_refcount_exit;
-	struct ftrace_event_file *enter_syscall_files[NR_syscalls];
-	struct ftrace_event_file *exit_syscall_files[NR_syscalls];
+	struct ftrace_event_file __rcu *enter_syscall_files[NR_syscalls];
+	struct ftrace_event_file __rcu *exit_syscall_files[NR_syscalls];
 #endif
 	int			stop_count;
 	int			clock_id;