ACPI: osl, add acpi_os_create_lock interface

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

2 files changed, 28 insertions, 8 deletions

diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index c90c76aa7f8b..cf750a7a9523 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -883,14 +883,6 @@ void acpi_os_wait_events_complete(void *context)
 
 EXPORT_SYMBOL(acpi_os_wait_events_complete);
 
-/*
- * Deallocate the memory for a spinlock.
- */
-void acpi_os_delete_lock(acpi_spinlock handle)
-{
-        return;
-}
-
 acpi_status
 acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle)
 {
@@ -1322,6 +1314,31 @@ int acpi_resources_are_enforced(void)
 EXPORT_SYMBOL(acpi_resources_are_enforced);
 
 /*
+ * Create and initialize a spinlock.
+ */
+acpi_status
+acpi_os_create_lock(acpi_spinlock *out_handle)
+{
+        spinlock_t *lock;
+
+        lock = ACPI_ALLOCATE(sizeof(spinlock_t));
+        if (!lock)
+                return AE_NO_MEMORY;
+        spin_lock_init(lock);
+        *out_handle = lock;
+
+        return AE_OK;
+}
+
+/*
+ * Deallocate the memory for a spinlock.
+ */
+void acpi_os_delete_lock(acpi_spinlock handle)
+{
+        ACPI_FREE(handle);
+}
+
+/*
  * Acquire a spinlock.
  *
  * handle is a pointer to the spinlock_t.
diff --git a/include/acpi/acpiosxf.h b/include/acpi/acpiosxf.h
index a3252a5ead66..a756bc8d866d 100644
--- a/include/acpi/acpiosxf.h
+++ b/include/acpi/acpiosxf.h
@@ -98,6 +98,9 @@ acpi_os_table_override(struct acpi_table_header *existing_table,
 /*
  * Spinlock primitives
  */
+acpi_status
+acpi_os_create_lock(acpi_spinlock *out_handle);
+
 void acpi_os_delete_lock(acpi_spinlock handle);
 
 acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock handle);