From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org,
linux-rt-users <linux-rt-users@vger.kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Carsten Emde <C.Emde@osadl.org>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
John Kacur <jkacur@redhat.com>,
Paul Gortmaker <paul.gortmaker@windriver.com>,
Julia Cartwright <julia@ni.com>,
Daniel Wagner <daniel.wagner@siemens.com>,
tom.zanussi@linux.intel.com
Subject: [PATCH RT 10/22] irqchip/gic-v3-its: Make its_lock a raw_spin_lock_t
Date: Wed, 05 Sep 2018 08:28:04 -0400 [thread overview]
Message-ID: <20180905122835.952828400@goodmis.org> (raw)
In-Reply-To: 20180905122754.443196118@goodmis.org
4.14.63-rt41-rc1 stable review patch.
If anyone has any objections, please let me know.
------------------
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
[ Upstream commit c7a3334c762a9b1dd2e39cb2ded00ce66e8a06d1 ]
The its_lock lock is held while a new device is added to the list and
during setup while the CPU is booted. Even on -RT the CPU-bootup is
performed with disabled interrupts.
Make its_lock a raw_spin_lock_t.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
drivers/irqchip/irq-gic-v3-its.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index 2ea39a83737f..e8217ebe8c1e 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -148,7 +148,7 @@ static struct {
} vpe_proxy;
static LIST_HEAD(its_nodes);
-static DEFINE_SPINLOCK(its_lock);
+static DEFINE_RAW_SPINLOCK(its_lock);
static struct rdists *gic_rdists;
static struct irq_domain *its_parent;
@@ -1850,7 +1850,7 @@ static void its_cpu_init_collection(void)
struct its_node *its;
int cpu;
- spin_lock(&its_lock);
+ raw_spin_lock(&its_lock);
cpu = smp_processor_id();
list_for_each_entry(its, &its_nodes, entry) {
@@ -1892,7 +1892,7 @@ static void its_cpu_init_collection(void)
its_send_invall(its, &its->collections[cpu]);
}
- spin_unlock(&its_lock);
+ raw_spin_unlock(&its_lock);
}
static struct its_device *its_find_device(struct its_node *its, u32 dev_id)
@@ -3041,9 +3041,9 @@ static int __init its_probe_one(struct resource *res,
if (err)
goto out_free_tables;
- spin_lock(&its_lock);
+ raw_spin_lock(&its_lock);
list_add(&its->entry, &its_nodes);
- spin_unlock(&its_lock);
+ raw_spin_unlock(&its_lock);
return 0;
--
2.18.0
next prev parent reply other threads:[~2018-09-05 12:30 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-05 12:27 [PATCH RT 00/22] Linux 4.14.63-rt41-rc1 Steven Rostedt
2018-09-05 12:27 ` [PATCH RT 01/22] sched/fair: Fix CFS bandwidth control lockdep DEADLOCK report Steven Rostedt
2018-09-05 12:27 ` [PATCH RT 02/22] locallock: provide {get,put}_locked_ptr() variants Steven Rostedt
2018-09-05 12:27 ` [PATCH RT 03/22] squashfs: make use of local lock in multi_cpu decompressor Steven Rostedt
2018-09-05 12:27 ` [PATCH RT 04/22] PM / suspend: Prevent might sleep splats (updated) Steven Rostedt
2018-09-05 12:27 ` [PATCH RT 05/22] PM / wakeup: Make events_lock a RAW_SPINLOCK Steven Rostedt
2018-09-05 12:28 ` [PATCH RT 06/22] PM / s2idle: Make s2idle_wait_head swait based Steven Rostedt
2018-09-05 12:28 ` [PATCH RT 07/22] seqlock: provide the same ordering semantics as mainline Steven Rostedt
2018-09-05 12:28 ` [PATCH RT 08/22] Revert "x86: UV: raw_spinlock conversion" Steven Rostedt
2018-09-06 7:35 ` Sebastian Andrzej Siewior
2018-09-06 8:38 ` Mike Galbraith
2018-09-06 12:58 ` Steven Rostedt
2018-09-05 12:28 ` [PATCH RT 09/22] Revert "timer: delay waking softirqs from the jiffy tick" Steven Rostedt
2018-09-05 12:28 ` Steven Rostedt [this message]
2018-09-05 12:28 ` [PATCH RT 11/22] irqchip/gic-v3-its: Move ITS ->pend_page allocation into an early CPU up hook Steven Rostedt
2018-09-06 7:40 ` Sebastian Andrzej Siewior
2018-09-07 19:28 ` Steven Rostedt
2018-09-05 12:28 ` [PATCH RT 12/22] sched/migrate_disable: fallback to preempt_disable() instead barrier() Steven Rostedt
2018-09-05 12:28 ` [PATCH RT 13/22] x86/ioapic: Dont let setaffinity unmask threaded EOI interrupt too early Steven Rostedt
2018-09-05 12:28 ` [PATCH RT 14/22] efi: Allow efi=runtime Steven Rostedt
2018-09-05 12:28 ` [PATCH RT 15/22] efi: Disable runtime services on RT Steven Rostedt
2018-09-05 12:28 ` [PATCH RT 16/22] crypto: cryptd - add a lock instead preempt_disable/local_bh_disable Steven Rostedt
2018-09-05 12:28 ` [PATCH RT 17/22] crypto: scompress - serialize RT percpu scratch buffer access with a local lock Steven Rostedt
2018-09-05 12:28 ` [PATCH RT 18/22] sched/core: Avoid __schedule() being called twice in a row Steven Rostedt
2018-09-05 12:28 ` [PATCH RT 19/22] Revert "arm64/xen: Make XEN depend on !RT" Steven Rostedt
2018-09-05 12:28 ` [PATCH RT 20/22] sched: Allow pinned user tasks to be awakened to the CPU they pinned Steven Rostedt
2018-09-05 12:28 ` [PATCH RT 22/22] Linux 4.14.63-rt41-rc1 Steven Rostedt
[not found] ` <20180905122837.830614967@goodmis.org>
2018-09-05 12:34 ` [PATCH RT 21/22] Drivers: hv: vmbus: include header for get_irq_regs() Steven Rostedt
2018-09-06 7:54 ` [PATCH RT 00/22] Linux 4.14.63-rt41-rc1 Sebastian Andrzej Siewior
2018-09-06 16:43 ` Steven Rostedt
2018-09-06 19:30 ` Sebastian Andrzej Siewior
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