The only usage of these is to put their addresses in arrays of pointers
to const attribute_groups. Make them const to allow the compiler to put
them in read-only memory.
Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Reviewed-by: Tom Rix <trix@redhat.com>
Signed-off-by: Moritz Fischer <mdf@kernel.org>
        NULL,
 };
 
-static struct attribute_group fme_perf_cpumask_group = {
+static const struct attribute_group fme_perf_cpumask_group = {
        .attrs = fme_perf_cpumask_attrs,
 };
 
        NULL,
 };
 
-static struct attribute_group fme_perf_format_group = {
+static const struct attribute_group fme_perf_format_group = {
        .name = "format",
        .attrs = fme_perf_format_attrs,
 };
        NULL,
 };
 
-static struct attribute_group fme_perf_events_group = {
+static const struct attribute_group fme_perf_events_group = {
        .name = "events",
        .attrs = fme_perf_events_attrs_empty,
 };