genetlink: mark families as __ro_after_init
Now genl_register_family() is the only thing (other than the
users themselves, perhaps, but I didn't find any doing that)
writing to the family struct.
In all families that I found, genl_register_family() is only
called from __init functions (some indirectly, in which case
I've add __init annotations to clarifly things), so all can
actually be marked __ro_after_init.
This protects the data structure from accidental corruption.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 8e5ca3c..271707d 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -12586,7 +12586,7 @@ static const struct genl_ops nl80211_ops[] = {
},
};
-static struct genl_family nl80211_fam = {
+static struct genl_family nl80211_fam __ro_after_init = {
.name = NL80211_GENL_NAME, /* have users key off the name instead */
.hdrsize = 0, /* no private header */
.version = 1, /* no particular meaning now */
@@ -14563,7 +14563,7 @@ void nl80211_send_ap_stopped(struct wireless_dev *wdev)
/* initialisation/exit functions */
-int nl80211_init(void)
+int __init nl80211_init(void)
{
int err;
