diff options
Diffstat (limited to 'debian/patches-rt/0289-thermal-x86_pkg_temp-make-pkg_temp_lock-a-raw-spinlo.patch')
| -rw-r--r-- | debian/patches-rt/0289-thermal-x86_pkg_temp-make-pkg_temp_lock-a-raw-spinlo.patch | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/debian/patches-rt/0289-thermal-x86_pkg_temp-make-pkg_temp_lock-a-raw-spinlo.patch b/debian/patches-rt/0289-thermal-x86_pkg_temp-make-pkg_temp_lock-a-raw-spinlo.patch new file mode 100644 index 000000000..3fe37ca3c --- /dev/null +++ b/debian/patches-rt/0289-thermal-x86_pkg_temp-make-pkg_temp_lock-a-raw-spinlo.patch @@ -0,0 +1,120 @@ +From 402252a8f4f986a5eb23639e3b9a1d9df4902d27 Mon Sep 17 00:00:00 2001 +From: Clark Williams <williams@redhat.com> +Date: Mon, 15 Jul 2019 15:25:00 -0500 +Subject: [PATCH 289/347] thermal/x86_pkg_temp: make pkg_temp_lock a raw + spinlock +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.246-rt110.tar.xz + +[ Upstream commit 8b03bb3ea7861b70b506199a69b1c8f81fe2d4d0 ] + +The spinlock pkg_temp_lock has the potential of being taken in atomic +context on v5.2-rt PREEMPT_RT. It's static and limited scope so +go ahead and make it a raw spinlock. + +Signed-off-by: Clark Williams <williams@redhat.com> +Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> +--- + drivers/thermal/x86_pkg_temp_thermal.c | 24 ++++++++++++------------ + 1 file changed, 12 insertions(+), 12 deletions(-) + +diff --git a/drivers/thermal/x86_pkg_temp_thermal.c b/drivers/thermal/x86_pkg_temp_thermal.c +index 1ef937d799e4..540becb78a0f 100644 +--- a/drivers/thermal/x86_pkg_temp_thermal.c ++++ b/drivers/thermal/x86_pkg_temp_thermal.c +@@ -75,7 +75,7 @@ static int max_packages __read_mostly; + /* Array of package pointers */ + static struct pkg_device **packages; + /* Serializes interrupt notification, work and hotplug */ +-static DEFINE_SPINLOCK(pkg_temp_lock); ++static DEFINE_RAW_SPINLOCK(pkg_temp_lock); + /* Protects zone operation in the work function against hotplug removal */ + static DEFINE_MUTEX(thermal_zone_mutex); + +@@ -291,12 +291,12 @@ static void pkg_temp_thermal_threshold_work_fn(struct work_struct *work) + u64 msr_val, wr_val; + + mutex_lock(&thermal_zone_mutex); +- spin_lock_irq(&pkg_temp_lock); ++ raw_spin_lock_irq(&pkg_temp_lock); + ++pkg_work_cnt; + + pkgdev = pkg_temp_thermal_get_dev(cpu); + if (!pkgdev) { +- spin_unlock_irq(&pkg_temp_lock); ++ raw_spin_unlock_irq(&pkg_temp_lock); + mutex_unlock(&thermal_zone_mutex); + return; + } +@@ -310,7 +310,7 @@ static void pkg_temp_thermal_threshold_work_fn(struct work_struct *work) + } + + enable_pkg_thres_interrupt(); +- spin_unlock_irq(&pkg_temp_lock); ++ raw_spin_unlock_irq(&pkg_temp_lock); + + /* + * If tzone is not NULL, then thermal_zone_mutex will prevent the +@@ -335,7 +335,7 @@ static int pkg_thermal_notify(u64 msr_val) + struct pkg_device *pkgdev; + unsigned long flags; + +- spin_lock_irqsave(&pkg_temp_lock, flags); ++ raw_spin_lock_irqsave(&pkg_temp_lock, flags); + ++pkg_interrupt_cnt; + + disable_pkg_thres_interrupt(); +@@ -347,7 +347,7 @@ static int pkg_thermal_notify(u64 msr_val) + pkg_thermal_schedule_work(pkgdev->cpu, &pkgdev->work); + } + +- spin_unlock_irqrestore(&pkg_temp_lock, flags); ++ raw_spin_unlock_irqrestore(&pkg_temp_lock, flags); + return 0; + } + +@@ -393,9 +393,9 @@ static int pkg_temp_thermal_device_add(unsigned int cpu) + pkgdev->msr_pkg_therm_high); + + cpumask_set_cpu(cpu, &pkgdev->cpumask); +- spin_lock_irq(&pkg_temp_lock); ++ raw_spin_lock_irq(&pkg_temp_lock); + packages[pkgid] = pkgdev; +- spin_unlock_irq(&pkg_temp_lock); ++ raw_spin_unlock_irq(&pkg_temp_lock); + return 0; + } + +@@ -432,7 +432,7 @@ static int pkg_thermal_cpu_offline(unsigned int cpu) + } + + /* Protect against work and interrupts */ +- spin_lock_irq(&pkg_temp_lock); ++ raw_spin_lock_irq(&pkg_temp_lock); + + /* + * Check whether this cpu was the current target and store the new +@@ -464,9 +464,9 @@ static int pkg_thermal_cpu_offline(unsigned int cpu) + * To cancel the work we need to drop the lock, otherwise + * we might deadlock if the work needs to be flushed. + */ +- spin_unlock_irq(&pkg_temp_lock); ++ raw_spin_unlock_irq(&pkg_temp_lock); + cancel_delayed_work_sync(&pkgdev->work); +- spin_lock_irq(&pkg_temp_lock); ++ raw_spin_lock_irq(&pkg_temp_lock); + /* + * If this is not the last cpu in the package and the work + * did not run after we dropped the lock above, then we +@@ -477,7 +477,7 @@ static int pkg_thermal_cpu_offline(unsigned int cpu) + pkg_thermal_schedule_work(target, &pkgdev->work); + } + +- spin_unlock_irq(&pkg_temp_lock); ++ raw_spin_unlock_irq(&pkg_temp_lock); + + /* Final cleanup if this is the last cpu */ + if (lastcpu) +-- +2.36.1 + |