* [for-next][PATCH] tracing: Add rcu annotation for syscall trace descriptors
@ 2013-11-11 22:15 Steven Rostedt
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From: Steven Rostedt @ 2013-11-11 22:15 UTC (permalink / raw)
To: LKML; +Cc: Ingo Molnar, Andrew Morton, kbuild test robot
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git
for-next
Head SHA1: 3a81a5210b7d33bb6d836b4c4952a54166a336f3
Steven Rostedt (Red Hat) (1):
tracing: Add rcu annotation for syscall trace descriptors
----
kernel/trace/trace.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
---------------------------
commit 3a81a5210b7d33bb6d836b4c4952a54166a336f3
Author: Steven Rostedt (Red Hat) <rostedt@goodmis.org>
Date: Mon Nov 11 11:47:06 2013 -0500
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>
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 @@ struct trace_array {
#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;
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