Merge series "Use raw spinlocks in the ls-extirq driver" from Vladimir Oltean <vladim...

[platform/kernel/linux-rpi.git] / drivers / base / regmap / regmap.c

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 6ad41d0..21a0c25 100644 (file)
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -533,6 +533,23 @@ __releases(&map->spinlock)
        spin_unlock_irqrestore(&map->spinlock, map->spinlock_flags);
 }
 
+static void regmap_lock_raw_spinlock(void *__map)
+__acquires(&map->raw_spinlock)
+{
+       struct regmap *map = __map;
+       unsigned long flags;
+
+       raw_spin_lock_irqsave(&map->raw_spinlock, flags);
+       map->raw_spinlock_flags = flags;
+}
+
+static void regmap_unlock_raw_spinlock(void *__map)
+__releases(&map->raw_spinlock)
+{
+       struct regmap *map = __map;
+       raw_spin_unlock_irqrestore(&map->raw_spinlock, map->raw_spinlock_flags);
+}
+
 static void dev_get_regmap_release(struct device *dev, void *res)
 {
        /*
@@ -770,11 +787,19 @@ struct regmap *__regmap_init(struct device *dev,
        } else {
                if ((bus && bus->fast_io) ||
                    config->fast_io) {
-                       spin_lock_init(&map->spinlock);
-                       map->lock = regmap_lock_spinlock;
-                       map->unlock = regmap_unlock_spinlock;
-                       lockdep_set_class_and_name(&map->spinlock,
-                                                  lock_key, lock_name);
+                       if (config->use_raw_spinlock) {
+                               raw_spin_lock_init(&map->raw_spinlock);
+                               map->lock = regmap_lock_raw_spinlock;
+                               map->unlock = regmap_unlock_raw_spinlock;
+                               lockdep_set_class_and_name(&map->raw_spinlock,
+                                                          lock_key, lock_name);
+                       } else {
+                               spin_lock_init(&map->spinlock);
+                               map->lock = regmap_lock_spinlock;
+                               map->unlock = regmap_unlock_spinlock;
+                               lockdep_set_class_and_name(&map->spinlock,
+                                                          lock_key, lock_name);
+                       }
                } else {
                        mutex_init(&map->mutex);
                        map->lock = regmap_lock_mutex;