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sock: Use sock_owned_by_user_nocheck() instead of sk_lock.owned.

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This patch moves sock_release_ownership() down in include/net/sock.h and
replaces some sk_lock.owned tests with sock_owned_by_user_nocheck().

Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp>
Link: https://lore.kernel.org/r/20211208062158.54132-1-kuniyu@amazon.co.jp
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Kuniyuki Iwashima
2021-12-08 15:21:58 +09:00
committed by Jakub Kicinski
parent be3158290d
commit 33d60fbd21
3 changed files with 15 additions and 14 deletions
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23
include/net/sock.h
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@ -1635,16 +1635,6 @@ static inline void sk_mem_uncharge(struct sock *sk, int size)
__sk_mem_reclaim(sk, SK_RECLAIM_CHUNK);
}
static inline void sock_release_ownership(struct sock *sk)
{
if (sk->sk_lock.owned) {
sk->sk_lock.owned = 0;
/* The sk_lock has mutex_unlock() semantics: */
mutex_release(&sk->sk_lock.dep_map, _RET_IP_);
}
}
/*
* Macro so as to not evaluate some arguments when
* lockdep is not enabled.
@ -1771,12 +1761,23 @@ static inline bool sock_owned_by_user_nocheck(const struct sock *sk)
return sk->sk_lock.owned;
}
static inline void sock_release_ownership(struct sock *sk)
{
if (sock_owned_by_user_nocheck(sk)) {
sk->sk_lock.owned = 0;
/* The sk_lock has mutex_unlock() semantics: */
mutex_release(&sk->sk_lock.dep_map, _RET_IP_);
}
}
/* no reclassification while locks are held */
static inline bool sock_allow_reclassification(const struct sock *csk)
{
struct sock *sk = (struct sock *)csk;
return !sk->sk_lock.owned && !spin_is_locked(&sk->sk_lock.slock);
return !sock_owned_by_user_nocheck(sk) &&
!spin_is_locked(&sk->sk_lock.slock);
}
struct sock *sk_alloc(struct net *net, int family, gfp_t priority,