blk-mq: really fix plug list flushing for nomerge queues

[linux-2.6-block.git] / kernel / trace / ftrace.c

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index a6c8252d7776b3954df1db09fb1831c603093c7c..900dbb1efff2bb8554e3fa6edeb4172af3594d55 100644 (file)
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -5737,7 +5737,6 @@ static int alloc_retstack_tasklist(struct ftrace_ret_stack **ret_stack_list)
 {
        int i;
        int ret = 0;
-       unsigned long flags;
        int start = 0, end = FTRACE_RETSTACK_ALLOC_SIZE;
        struct task_struct *g, *t;
 
@@ -5753,7 +5752,7 @@ static int alloc_retstack_tasklist(struct ftrace_ret_stack **ret_stack_list)
                }
        }
 
-       read_lock_irqsave(&tasklist_lock, flags);
+       read_lock(&tasklist_lock);
        do_each_thread(g, t) {
                if (start == end) {
                        ret = -EAGAIN;
@@ -5771,7 +5770,7 @@ static int alloc_retstack_tasklist(struct ftrace_ret_stack **ret_stack_list)
        } while_each_thread(g, t);
 
 unlock:
-       read_unlock_irqrestore(&tasklist_lock, flags);
+       read_unlock(&tasklist_lock);
 free:
        for (i = start; i < end; i++)
                kfree(ret_stack_list[i]);