linux-kernel - [tip: core/rcu] net: Un-hide lockdep_sock_is

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Date:   Sun, 13 Dec 2020 19:01:14 -0000
From:   "tip-bot2 for Jakub Kicinski" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Jakub Kicinski <kuba@...nel.org>,
        "Paul E. McKenney" <paulmck@...nel.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: core/rcu] net: Un-hide lockdep_sock_is_held() for !LOCKDEP

The following commit has been merged into the core/rcu branch of tip:

Commit-ID:     d97f3bdf7a1c0346d3a272aa756d16633f0b8b3b
Gitweb:        https://git.kernel.org/tip/d97f3bdf7a1c0346d3a272aa756d16633f0b8b3b
Author:        Jakub Kicinski <kuba@...nel.org>
AuthorDate:    Wed, 16 Sep 2020 11:45:24 -07:00
Committer:     Paul E. McKenney <paulmck@...nel.org>
CommitterDate: Mon, 02 Nov 2020 17:09:59 -08:00

net: Un-hide lockdep_sock_is_held() for !LOCKDEP

Currently, variables used only within lockdep expressions are flagged
as unused, requiring that these variables' declarations be decorated
with either #ifdef or __maybe_unused.  This results in ugly code.
This commit therefore causes the lockdep_sock_is_held() function to be
visible even when lockdep is not enabled, thus removing the need for
these decorations.  This approach further relies on dead-code elimination
to remove any references to functions or variables that are not available
in non-lockdep kernels.

Signed-off-by: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
---
 include/net/sock.h | 2 --
 1 file changed, 2 deletions(-)

diff --git a/include/net/sock.h b/include/net/sock.h
index a5c6ae7..198d548 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -1566,13 +1566,11 @@ do {									\
 	lockdep_init_map(&(sk)->sk_lock.dep_map, (name), (key), 0);	\
 } while (0)
 
-#ifdef CONFIG_LOCKDEP
 static inline bool lockdep_sock_is_held(const struct sock *sk)
 {
 	return lockdep_is_held(&sk->sk_lock) ||
 	       lockdep_is_held(&sk->sk_lock.slock);
 }
-#endif
 
 void lock_sock_nested(struct sock *sk, int subclass);