linux-kernel - [RFC PATCH 3/6] selinux: add likely hints for fast paths

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250318083422.21489-2-cgoettsche@seltendoof.de>
Date: Tue, 18 Mar 2025 09:33:30 +0100
From: Christian Göttsche <cgoettsche@...tendoof.de>
To: 
Cc: Christian Göttsche <cgzones@...glemail.com>,
	Paul Moore <paul@...l-moore.com>,
	Stephen Smalley <stephen.smalley.work@...il.com>,
	Ondrej Mosnacek <omosnace@...hat.com>,
	Thiébaud Weksteen <tweek@...gle.com>,
	Bram Bonné <brambonne@...gle.com>,
	Casey Schaufler <casey@...aufler-ca.com>,
	Canfeng Guo <guocanfeng@...ontech.com>,
	GUO Zihua <guozihua@...wei.com>,
	selinux@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [RFC PATCH 3/6] selinux: add likely hints for fast paths

From: Christian Göttsche <cgzones@...glemail.com>

In the network hashtable lookup code add likely() compiler hints in the
fast path, like already done in sel_netif_sid().

Signed-off-by: Christian Göttsche <cgzones@...glemail.com>
---
 security/selinux/ibpkey.c  | 2 +-
 security/selinux/netnode.c | 2 +-
 security/selinux/netport.c | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/security/selinux/ibpkey.c b/security/selinux/ibpkey.c
index 48f537b41c58..94f3eef22bad 100644
--- a/security/selinux/ibpkey.c
+++ b/security/selinux/ibpkey.c
@@ -184,7 +184,7 @@ int sel_ib_pkey_sid(u64 subnet_prefix, u16 pkey_num, u32 *sid)
 
 	rcu_read_lock();
 	pkey = sel_ib_pkey_find(subnet_prefix, pkey_num);
-	if (pkey) {
+	if (likely(pkey)) {
 		*sid = pkey->psec.sid;
 		rcu_read_unlock();
 		return 0;
diff --git a/security/selinux/netnode.c b/security/selinux/netnode.c
index b7900d5ae557..8bb456d80dd5 100644
--- a/security/selinux/netnode.c
+++ b/security/selinux/netnode.c
@@ -253,7 +253,7 @@ int sel_netnode_sid(const void *addr, u16 family, u32 *sid)
 
 	rcu_read_lock();
 	node = sel_netnode_find(addr, family);
-	if (node != NULL) {
+	if (likely(node != NULL)) {
 		*sid = node->nsec.sid;
 		rcu_read_unlock();
 		return 0;
diff --git a/security/selinux/netport.c b/security/selinux/netport.c
index 2e22ad9c2bd0..7d2207384d40 100644
--- a/security/selinux/netport.c
+++ b/security/selinux/netport.c
@@ -186,7 +186,7 @@ int sel_netport_sid(u8 protocol, u16 pnum, u32 *sid)
 
 	rcu_read_lock();
 	port = sel_netport_find(protocol, pnum);
-	if (port != NULL) {
+	if (likely(port != NULL)) {
 		*sid = port->psec.sid;
 		rcu_read_unlock();
 		return 0;
-- 
2.49.0