From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751587Ab0KATQl (ORCPT ); Mon, 1 Nov 2010 15:16:41 -0400 Received: from mx1.redhat.com ([209.132.183.28]:47789 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751179Ab0KATQg (ORCPT ); Mon, 1 Nov 2010 15:16:36 -0400 From: Jiri Olsa To: dhowells@redhat.com, lizf@cn.fujitsu.com, paul.moore@hp.com, johannes@sipsolutions.net, dipankar@in.ibm.com Cc: linux-kernel@vger.kernel.org, containers@lists.linux-foundation.org, kvm@vger.kernel.org, Jiri Olsa Subject: [PATCH 3/3] net - removing superfluous rcu_read_lock_held check Date: Mon, 1 Nov 2010 20:15:09 +0100 Message-Id: <1288638909-10541-4-git-send-email-jolsa@redhat.com> In-Reply-To: <1288638909-10541-1-git-send-email-jolsa@redhat.com> References: <1288638909-10541-1-git-send-email-jolsa@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org hi, the rcu_dereference_check is defined as #define rcu_dereference_check(p, c) \ __rcu_dereference_check((p), rcu_read_lock_held() || (c), __rcu) so the caller does not need to specify rcu_read_lock_held() condition. wbr, jirka Signed-off-by: Jiri Olsa --- include/linux/rtnetlink.h | 3 +-- include/net/sock.h | 3 +-- net/mac80211/sta_info.c | 4 ---- net/netlabel/netlabel_domainhash.c | 3 +-- net/netlabel/netlabel_unlabeled.c | 3 +-- 5 files changed, 4 insertions(+), 12 deletions(-) diff --git a/include/linux/rtnetlink.h b/include/linux/rtnetlink.h index d42f274..dfe5ba1 100644 --- a/include/linux/rtnetlink.h +++ b/include/linux/rtnetlink.h @@ -758,8 +758,7 @@ extern int lockdep_rtnl_is_held(void); * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference() */ #define rcu_dereference_rtnl(p) \ - rcu_dereference_check(p, rcu_read_lock_held() || \ - lockdep_rtnl_is_held()) + rcu_dereference_check(p, lockdep_rtnl_is_held()) /** * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL diff --git a/include/net/sock.h b/include/net/sock.h index c7a7362..bee3e9c 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -1274,8 +1274,7 @@ extern unsigned long sock_i_ino(struct sock *sk); static inline struct dst_entry * __sk_dst_get(struct sock *sk) { - return rcu_dereference_check(sk->sk_dst_cache, rcu_read_lock_held() || - sock_owned_by_user(sk) || + return rcu_dereference_check(sk->sk_dst_cache, sock_owned_by_user(sk) || lockdep_is_held(&sk->sk_lock.slock)); } diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c index 6d8f897..c879217 100644 --- a/net/mac80211/sta_info.c +++ b/net/mac80211/sta_info.c @@ -94,7 +94,6 @@ struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, struct sta_info *sta; sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], - rcu_read_lock_held() || lockdep_is_held(&local->sta_lock) || lockdep_is_held(&local->sta_mtx)); while (sta) { @@ -102,7 +101,6 @@ struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, memcmp(sta->sta.addr, addr, ETH_ALEN) == 0) break; sta = rcu_dereference_check(sta->hnext, - rcu_read_lock_held() || lockdep_is_held(&local->sta_lock) || lockdep_is_held(&local->sta_mtx)); } @@ -120,7 +118,6 @@ struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, struct sta_info *sta; sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], - rcu_read_lock_held() || lockdep_is_held(&local->sta_lock) || lockdep_is_held(&local->sta_mtx)); while (sta) { @@ -129,7 +126,6 @@ struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, memcmp(sta->sta.addr, addr, ETH_ALEN) == 0) break; sta = rcu_dereference_check(sta->hnext, - rcu_read_lock_held() || lockdep_is_held(&local->sta_lock) || lockdep_is_held(&local->sta_mtx)); } diff --git a/net/netlabel/netlabel_domainhash.c b/net/netlabel/netlabel_domainhash.c index d37b7f8..82795a4 100644 --- a/net/netlabel/netlabel_domainhash.c +++ b/net/netlabel/netlabel_domainhash.c @@ -55,8 +55,7 @@ struct netlbl_domhsh_tbl { * should be okay */ static DEFINE_SPINLOCK(netlbl_domhsh_lock); #define netlbl_domhsh_rcu_deref(p) \ - rcu_dereference_check(p, rcu_read_lock_held() || \ - lockdep_is_held(&netlbl_domhsh_lock)) + rcu_dereference_check(p, lockdep_is_held(&netlbl_domhsh_lock)) static struct netlbl_domhsh_tbl *netlbl_domhsh = NULL; static struct netlbl_dom_map *netlbl_domhsh_def = NULL; diff --git a/net/netlabel/netlabel_unlabeled.c b/net/netlabel/netlabel_unlabeled.c index e2b0a68..d2f982f 100644 --- a/net/netlabel/netlabel_unlabeled.c +++ b/net/netlabel/netlabel_unlabeled.c @@ -116,8 +116,7 @@ struct netlbl_unlhsh_walk_arg { * hash table should be okay */ static DEFINE_SPINLOCK(netlbl_unlhsh_lock); #define netlbl_unlhsh_rcu_deref(p) \ - rcu_dereference_check(p, rcu_read_lock_held() || \ - lockdep_is_held(&netlbl_unlhsh_lock)) + rcu_dereference_check(p, lockdep_is_held(&netlbl_unlhsh_lock)) static struct netlbl_unlhsh_tbl *netlbl_unlhsh = NULL; static struct netlbl_unlhsh_iface *netlbl_unlhsh_def = NULL; -- 1.7.1