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Message-ID: <20201015153447.5nzzwc54e3o2rzib@linutronix.de>
Date: Thu, 15 Oct 2020 17:34:47 +0200
From: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To: Thomas Gleixner <tglx@...utronix.de>
Cc: LKML <linux-kernel@...r.kernel.org>,
linux-rt-users <linux-rt-users@...r.kernel.org>,
Steven Rostedt <rostedt@...dmis.org>
Subject: [ANNOUNCE] v5.9-rt16
Dear RT folks!
I'm pleased to announce the v5.9-rt16 patch set.
Changes since v5.9-rt15:
- The rtmutex rework resulted in "unused variable" warnings if built
without lockdep. Reported by Mike Galbraith.
- The softirq rework led to a warning which could be triggered by the
`ss' tool. Reported by Mike Galbraith.
- The migrate-disable rework removed a data from a trace-event. Adding
it bad resulted in a compile failure for !RT. Patch by Clark
Williams.
Known issues
- It has been pointed out that due to changes to the printk code the
internal buffer representation changed. This is only an issue if tools
like `crash' are used to extract the printk buffer from a kernel memory
image.
The delta patch against v5.9-rt15 is appended below and can be found here:
https://cdn.kernel.org/pub/linux/kernel/projects/rt/5.9/incr/patch-5.9-rt15-rt16.patch.xz
You can get this release via the git tree at:
git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v5.9-rt16
The RT patch against v5.9 can be found here:
https://cdn.kernel.org/pub/linux/kernel/projects/rt/5.9/older/patch-5.9-rt16.patch.xz
The split quilt queue is available at:
https://cdn.kernel.org/pub/linux/kernel/projects/rt/5.9/older/patches-5.9-rt16.tar.xz
Sebastian
diff --git a/include/linux/spinlock_rt.h b/include/linux/spinlock_rt.h
index ac2be04c59fa7..3085132eae383 100644
--- a/include/linux/spinlock_rt.h
+++ b/include/linux/spinlock_rt.h
@@ -69,10 +69,10 @@ extern void __lockfunc __rt_spin_unlock(struct rt_mutex *lock);
rt_spin_lock_nested(lock, subclass); \
} while (0)
-# define spin_lock_nest_lock(lock, nest_lock) \
+# define spin_lock_nest_lock(lock, subclass) \
do { \
- typecheck(struct lockdep_map *, &(nest_lock)->dep_map); \
- rt_spin_lock_nest_lock(lock, &(nest_lock)->dep_map); \
+ typecheck(struct lockdep_map *, &(subclass)->dep_map); \
+ rt_spin_lock_nest_lock(lock, &(subclass)->dep_map); \
} while (0)
# define spin_lock_irqsave_nested(lock, flags, subclass) \
@@ -82,15 +82,15 @@ extern void __lockfunc __rt_spin_unlock(struct rt_mutex *lock);
rt_spin_lock_nested(lock, subclass); \
} while (0)
#else
-# define spin_lock_nested(lock, subclass) spin_lock(lock)
-# define spin_lock_nest_lock(lock, nest_lock) spin_lock(lock)
-# define spin_lock_bh_nested(lock, subclass) spin_lock_bh(lock)
+# define spin_lock_nested(lock, subclass) spin_lock(((void)(subclass), (lock)))
+# define spin_lock_nest_lock(lock, subclass) spin_lock(((void)(subclass), (lock)))
+# define spin_lock_bh_nested(lock, subclass) spin_lock_bh(((void)(subclass), (lock)))
# define spin_lock_irqsave_nested(lock, flags, subclass) \
do { \
typecheck(unsigned long, flags); \
flags = 0; \
- spin_lock(lock); \
+ spin_lock(((void)(subclass), (lock))); \
} while (0)
#endif
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index aa7f3bef6d4fa..21706f318a001 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -2437,6 +2437,15 @@ enum print_line_t trace_handle_return(struct trace_seq *s)
}
EXPORT_SYMBOL_GPL(trace_handle_return);
+static unsigned short migration_disable_value(struct task_struct *tsk)
+{
+#if defined(CONFIG_SMP) && defined(CONFIG_PREEMPT_RT)
+ return tsk ? tsk->migration_disabled : 0;
+#else
+ return 0;
+#endif
+}
+
void
tracing_generic_entry_update(struct trace_entry *entry, unsigned short type,
unsigned long flags, int pc)
@@ -2460,7 +2469,7 @@ tracing_generic_entry_update(struct trace_entry *entry, unsigned short type,
(need_resched_lazy() ? TRACE_FLAG_NEED_RESCHED_LAZY : 0) |
(test_preempt_need_resched() ? TRACE_FLAG_PREEMPT_RESCHED : 0);
- entry->migrate_disable = (tsk) ? tsk->migration_disabled & 0xFF : 0;
+ entry->migrate_disable = migration_disable_value(tsk);
}
EXPORT_SYMBOL_GPL(tracing_generic_entry_update);
diff --git a/localversion-rt b/localversion-rt
index 18777ec0c27d4..1199ebade17b4 100644
--- a/localversion-rt
+++ b/localversion-rt
@@ -1 +1 @@
--rt15
+-rt16
diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c
index 239e54474b653..fcb105cbb5465 100644
--- a/net/ipv4/inet_hashtables.c
+++ b/net/ipv4/inet_hashtables.c
@@ -585,7 +585,9 @@ int __inet_hash(struct sock *sk, struct sock *osk)
int err = 0;
if (sk->sk_state != TCP_LISTEN) {
+ local_bh_disable();
inet_ehash_nolisten(sk, osk);
+ local_bh_enable();
return 0;
}
WARN_ON(!sk_unhashed(sk));
@@ -617,11 +619,8 @@ int inet_hash(struct sock *sk)
{
int err = 0;
- if (sk->sk_state != TCP_CLOSE) {
- local_bh_disable();
+ if (sk->sk_state != TCP_CLOSE)
err = __inet_hash(sk, NULL);
- local_bh_enable();
- }
return err;
}
@@ -632,17 +631,20 @@ void inet_unhash(struct sock *sk)
struct inet_hashinfo *hashinfo = sk->sk_prot->h.hashinfo;
struct inet_listen_hashbucket *ilb = NULL;
spinlock_t *lock;
+ bool state_listen;
if (sk_unhashed(sk))
return;
if (sk->sk_state == TCP_LISTEN) {
+ state_listen = true;
ilb = &hashinfo->listening_hash[inet_sk_listen_hashfn(sk)];
- lock = &ilb->lock;
+ spin_lock(&ilb->lock);
} else {
+ state_listen = false;
lock = inet_ehash_lockp(hashinfo, sk->sk_hash);
+ spin_lock_bh(lock);
}
- spin_lock_bh(lock);
if (sk_unhashed(sk))
goto unlock;
@@ -655,7 +657,10 @@ void inet_unhash(struct sock *sk)
__sk_nulls_del_node_init_rcu(sk);
sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
unlock:
- spin_unlock_bh(lock);
+ if (state_listen)
+ spin_unlock(&ilb->lock);
+ else
+ spin_unlock_bh(lock);
}
EXPORT_SYMBOL_GPL(inet_unhash);
diff --git a/net/ipv6/inet6_hashtables.c b/net/ipv6/inet6_hashtables.c
index 2d3add9e61162..50fd17cbf3ec7 100644
--- a/net/ipv6/inet6_hashtables.c
+++ b/net/ipv6/inet6_hashtables.c
@@ -335,11 +335,8 @@ int inet6_hash(struct sock *sk)
{
int err = 0;
- if (sk->sk_state != TCP_CLOSE) {
- local_bh_disable();
+ if (sk->sk_state != TCP_CLOSE)
err = __inet_hash(sk, NULL);
- local_bh_enable();
- }
return err;
}
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