[PATCH v1 1/3] ACPI: OSL: Use spin locks without disabling interrupts

Rafael J. Wysocki
2023-12-15T11:34:31Z

After commit 7a36b901a6eb ("ACPI: OSL: Use a threaded interrupt handler
for SCI") any ACPICA code never runs in a hardirq handler, so it need
not dissable interrupts on the local CPU when acquiring a spin lock.

Make it use spin locks without disabling interrupts.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
drivers/acpi/osl.c | 10 ++++------
1 file changed, 4 insertions(+), 6 deletions(-)

Index: linux-pm/drivers/acpi/osl.c
===================================================================
--- linux-pm.orig/drivers/acpi/osl.c
+++ linux-pm/drivers/acpi/osl.c
@@ -1515,20 +1515,18 @@ void acpi_os_delete_lock(acpi_spinlock h
acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp)
__acquires(lockp)
{
- acpi_cpu_flags flags;
-
- spin_lock_irqsave(lockp, flags);
- return flags;
+ spin_lock(lockp);
+ return 0;
}

/*
* Release a spinlock. See above.
*/

-void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags)
+void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags not_used)
__releases(lockp)
{
- spin_unlock_irqrestore(lockp, flags);
+ spin_unlock(lockp);
}

#ifndef ACPI_USE_LOCAL_CACHE