bpf: Constify bpf_verifier_ops structure

This bpf_verifier_ops structure is never modified, like the other
bpf_verifier_ops structures, so declare it as const.

Done with the help of Coccinelle.

Link: http://lkml.kernel.org/r/[e-mail]

Signed-off-by: Julia Lawall <[e-mail]>
Signed-off-by: Steven Rostedt <[e-mail]>

kernel/trace/bpf_trace.c

···
 	return true;
 }
 
-static struct bpf_verifier_ops kprobe_prog_ops = {
+static const struct bpf_verifier_ops kprobe_prog_ops = {
 	.get_func_proto  = kprobe_prog_func_proto,
 	.is_valid_access = kprobe_prog_is_valid_access,
 };