tracing: make all file_operations const

Impact: cleanup

All file_operations structures should be constant. No one is going to
change them.

Reported-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
diff --git a/kernel/trace/trace_sysprof.c b/kernel/trace/trace_sysprof.c
index c771af4..91fd19c 100644
--- a/kernel/trace/trace_sysprof.c
+++ b/kernel/trace/trace_sysprof.c
@@ -314,7 +314,7 @@
 	return cnt;
 }
 
-static struct file_operations sysprof_sample_fops = {
+static const struct file_operations sysprof_sample_fops = {
 	.read		= sysprof_sample_read,
 	.write		= sysprof_sample_write,
 };