mirror of
https://github.com/OpenVoiceOS/OpenVoiceOS
synced 2025-02-23 15:17:39 +01:00
67 lines
2.3 KiB
Diff
67 lines
2.3 KiB
Diff
From b71ab9837960957eba5540fa4f8cbdff716d109a Mon Sep 17 00:00:00 2001
|
|
From: Thomas Gleixner <tglx@linutronix.de>
|
|
Date: Fri, 8 Sep 2023 18:22:53 +0200
|
|
Subject: [PATCH 006/196] locking/rtmutex: Add a lockdep assert to catch
|
|
potential nested blocking
|
|
|
|
There used to be a BUG_ON(current->pi_blocked_on) in the lock acquisition
|
|
functions, but that vanished in one of the rtmutex overhauls.
|
|
|
|
Bring it back in form of a lockdep assert to catch code paths which take
|
|
rtmutex based locks with current::pi_blocked_on != NULL.
|
|
|
|
Reported-by: Crystal Wood <swood@redhat.com>
|
|
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
|
|
Signed-off-by: "Peter Zijlstra (Intel)" <peterz@infradead.org>
|
|
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
|
|
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
|
|
Link: https://lkml.kernel.org/r/20230908162254.999499-7-bigeasy@linutronix.de
|
|
---
|
|
kernel/locking/rtmutex.c | 2 ++
|
|
kernel/locking/rwbase_rt.c | 2 ++
|
|
kernel/locking/spinlock_rt.c | 2 ++
|
|
3 files changed, 6 insertions(+)
|
|
|
|
diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c
|
|
index a3fe05dfd0d8..4a10e8c16fd2 100644
|
|
--- a/kernel/locking/rtmutex.c
|
|
+++ b/kernel/locking/rtmutex.c
|
|
@@ -1784,6 +1784,8 @@ static int __sched rt_mutex_slowlock(struct rt_mutex_base *lock,
|
|
static __always_inline int __rt_mutex_lock(struct rt_mutex_base *lock,
|
|
unsigned int state)
|
|
{
|
|
+ lockdep_assert(!current->pi_blocked_on);
|
|
+
|
|
if (likely(rt_mutex_try_acquire(lock)))
|
|
return 0;
|
|
|
|
diff --git a/kernel/locking/rwbase_rt.c b/kernel/locking/rwbase_rt.c
|
|
index c7258cb32d91..34a59569db6b 100644
|
|
--- a/kernel/locking/rwbase_rt.c
|
|
+++ b/kernel/locking/rwbase_rt.c
|
|
@@ -133,6 +133,8 @@ static int __sched __rwbase_read_lock(struct rwbase_rt *rwb,
|
|
static __always_inline int rwbase_read_lock(struct rwbase_rt *rwb,
|
|
unsigned int state)
|
|
{
|
|
+ lockdep_assert(!current->pi_blocked_on);
|
|
+
|
|
if (rwbase_read_trylock(rwb))
|
|
return 0;
|
|
|
|
diff --git a/kernel/locking/spinlock_rt.c b/kernel/locking/spinlock_rt.c
|
|
index 842037b2ba54..38e292454fcc 100644
|
|
--- a/kernel/locking/spinlock_rt.c
|
|
+++ b/kernel/locking/spinlock_rt.c
|
|
@@ -37,6 +37,8 @@
|
|
|
|
static __always_inline void rtlock_lock(struct rt_mutex_base *rtm)
|
|
{
|
|
+ lockdep_assert(!current->pi_blocked_on);
|
|
+
|
|
if (unlikely(!rt_mutex_cmpxchg_acquire(rtm, NULL, current)))
|
|
rtlock_slowlock(rtm);
|
|
}
|
|
--
|
|
2.45.1
|
|
|