[PATCH RT 10/24] irqchip/gic-v3-its: Make its_lock a raw_spin_lock_t
From: Steven Rostedt <rostedt@goodmis.org>
Date: 2018-09-07 21:01:13
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lkml
Subsystem:
arm generic interrupt controller drivers, irqchip drivers, the rest · Maintainers:
Marc Zyngier, Thomas Gleixner, Linus Torvalds
4.14.63-rt41-rc2 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