From: Monam Agarwal <monamagarwal123-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: linville-2XuSBdqkA4R54TAoqtyWWQ@public.gmane.org,
johannes-cdvu00un1VgdHxzADdlk8Q@public.gmane.org,
davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org,
linux-wireless-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: [PATCH] net/mac80211: Use RCU_INIT_POINTER(x, NULL) in iface.c
Date: Mon, 24 Mar 2014 00:48:08 +0530 [thread overview]
Message-ID: <1395602288-13958-1-git-send-email-monamagarwal123@gmail.com> (raw)
This patch replaces rcu_assign_pointer(x, NULL) with RCU_INIT_POINTER(x, NULL)
The rcu_assign_pointer() ensures that the initialization of a structure
is carried out before storing a pointer to that structure.
And in the case of the NULL pointer, there is no structure to initialize.
So, rcu_assign_pointer(p, NULL) can be safely converted to RCU_INIT_POINTER(p, NULL)
Signed-off-by: Monam Agarwal <monamagarwal123-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
net/mac80211/iface.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index b8d331e..4826c8f 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -423,7 +423,7 @@ int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
mutex_unlock(&local->mtx);
if (ret) {
mutex_lock(&local->iflist_mtx);
- rcu_assign_pointer(local->monitor_sdata, NULL);
+ RCU_INIT_POINTER(local->monitor_sdata, NULL);
mutex_unlock(&local->iflist_mtx);
synchronize_net();
drv_remove_interface(local, sdata);
@@ -452,7 +452,7 @@ void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
return;
}
- rcu_assign_pointer(local->monitor_sdata, NULL);
+ RCU_INIT_POINTER(local->monitor_sdata, NULL);
mutex_unlock(&local->iflist_mtx);
synchronize_net();
@@ -876,7 +876,7 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
switch (sdata->vif.type) {
case NL80211_IFTYPE_AP_VLAN:
list_del(&sdata->u.vlan.list);
- rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
+ RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
/* no need to tell driver */
break;
case NL80211_IFTYPE_MONITOR:
@@ -895,7 +895,7 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
break;
case NL80211_IFTYPE_P2P_DEVICE:
/* relies on synchronize_rcu() below */
- rcu_assign_pointer(local->p2p_sdata, NULL);
+ RCU_INIT_POINTER(local->p2p_sdata, NULL);
/* fall through */
default:
cancel_work_sync(&sdata->work);
--
1.7.9.5
--
To unsubscribe from this list: send the line "unsubscribe linux-wireless" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
reply other threads:[~2014-03-23 19:18 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1395602288-13958-1-git-send-email-monamagarwal123@gmail.com \
--to=monamagarwal123-re5jqeeqqe8avxtiumwx3w@public.gmane.org \
--cc=davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org \
--cc=johannes-cdvu00un1VgdHxzADdlk8Q@public.gmane.org \
--cc=linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux-wireless-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linville-2XuSBdqkA4R54TAoqtyWWQ@public.gmane.org \
--cc=netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).