x86_64: O_EXCL on /dev/mcelog

[linux-2.6-omap-h63xx.git] / block / elevator.c

diff --git a/block/elevator.c b/block/elevator.c
index 96a00c822748cf8a673071a32806358963f5cdad..d265963d1ed333fc6babce13d5fb4112f74bde12 100644 (file)
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -112,12 +112,8 @@ static inline int elv_try_merge(struct request *__rq, struct bio *bio)
 static struct elevator_type *elevator_find(const char *name)
 {
        struct elevator_type *e;
-       struct list_head *entry;
-
-       list_for_each(entry, &elv_list) {
-
-               e = list_entry(entry, struct elevator_type, list);
 
+       list_for_each_entry(e, &elv_list, list) {
                if (!strcmp(e->elevator_name, name))
                        return e;
        }
@@ -134,13 +130,13 @@ static struct elevator_type *elevator_get(const char *name)
 {
        struct elevator_type *e;
 
-       spin_lock_irq(&elv_list_lock);
+       spin_lock(&elv_list_lock);
 
        e = elevator_find(name);
        if (e && !try_module_get(e->elevator_owner))
                e = NULL;
 
-       spin_unlock_irq(&elv_list_lock);
+       spin_unlock(&elv_list_lock);
 
        return e;
 }
@@ -181,11 +177,10 @@ static elevator_t *elevator_alloc(request_queue_t *q, struct elevator_type *e)
        elevator_t *eq;
        int i;
 
-       eq = kmalloc_node(sizeof(elevator_t), GFP_KERNEL, q->node);
+       eq = kmalloc_node(sizeof(elevator_t), GFP_KERNEL | __GFP_ZERO, q->node);
        if (unlikely(!eq))
                goto err;
 
-       memset(eq, 0, sizeof(*eq));
        eq->ops = &e->ops;
        eq->elevator_type = e;
        kobject_init(&eq->kobj);
@@ -965,10 +960,11 @@ void elv_unregister_queue(struct request_queue *q)
 int elv_register(struct elevator_type *e)
 {
        char *def = "";
-       spin_lock_irq(&elv_list_lock);
+
+       spin_lock(&elv_list_lock);
        BUG_ON(elevator_find(e->elevator_name));
        list_add_tail(&e->list, &elv_list);
-       spin_unlock_irq(&elv_list_lock);
+       spin_unlock(&elv_list_lock);
 
        if (!strcmp(e->elevator_name, chosen_elevator) ||
                        (!*chosen_elevator &&
@@ -998,9 +994,9 @@ void elv_unregister(struct elevator_type *e)
                read_unlock(&tasklist_lock);
        }
 
-       spin_lock_irq(&elv_list_lock);
+       spin_lock(&elv_list_lock);
        list_del_init(&e->list);
-       spin_unlock_irq(&elv_list_lock);
+       spin_unlock(&elv_list_lock);
 }
 EXPORT_SYMBOL_GPL(elv_unregister);
 
@@ -1115,20 +1111,17 @@ ssize_t elv_iosched_show(request_queue_t *q, char *name)
 {
        elevator_t *e = q->elevator;
        struct elevator_type *elv = e->elevator_type;
-       struct list_head *entry;
+       struct elevator_type *__e;
        int len = 0;
 
-       spin_lock_irq(&elv_list_lock);
-       list_for_each(entry, &elv_list) {
-               struct elevator_type *__e;
-
-               __e = list_entry(entry, struct elevator_type, list);
+       spin_lock(&elv_list_lock);
+       list_for_each_entry(__e, &elv_list, list) {
                if (!strcmp(elv->elevator_name, __e->elevator_name))
                        len += sprintf(name+len, "[%s] ", elv->elevator_name);
                else
                        len += sprintf(name+len, "%s ", __e->elevator_name);
        }
-       spin_unlock_irq(&elv_list_lock);
+       spin_unlock(&elv_list_lock);
 
        len += sprintf(len+name, "\n");
        return len;