diff --git a/drivers/char/nvram.c b/drivers/char/nvram.c
index fdbcc9f..5eb83c3 100644
--- a/drivers/char/nvram.c
+++ b/drivers/char/nvram.c
@@ -336,14 +336,12 @@
 
 static int nvram_open(struct inode *inode, struct file *file)
 {
-	lock_kernel();
 	spin_lock(&nvram_state_lock);
 
 	if ((nvram_open_cnt && (file->f_flags & O_EXCL)) ||
 	    (nvram_open_mode & NVRAM_EXCL) ||
 	    ((file->f_mode & FMODE_WRITE) && (nvram_open_mode & NVRAM_WRITE))) {
 		spin_unlock(&nvram_state_lock);
-		unlock_kernel();
 		return -EBUSY;
 	}
 
@@ -354,7 +352,6 @@
 	nvram_open_cnt++;
 
 	spin_unlock(&nvram_state_lock);
-	unlock_kernel();
 
 	return 0;
 }
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 451481c..d13492d 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -90,7 +90,7 @@
  * @startup:		start up the interrupt (defaults to ->enable if NULL)
  * @shutdown:		shut down the interrupt (defaults to ->disable if NULL)
  * @enable:		enable the interrupt (defaults to chip->unmask if NULL)
- * @disable:		disable the interrupt (defaults to chip->mask if NULL)
+ * @disable:		disable the interrupt
  * @ack:		start of a new interrupt
  * @mask:		mask an interrupt source
  * @mask_ack:		ack and mask an interrupt source
diff --git a/kernel/futex_compat.c b/kernel/futex_compat.c
index 2357165..d49afb2 100644
--- a/kernel/futex_compat.c
+++ b/kernel/futex_compat.c
@@ -146,7 +146,7 @@
 		struct task_struct *p;
 
 		ret = -ESRCH;
-		read_lock(&tasklist_lock);
+		rcu_read_lock();
 		p = find_task_by_vpid(pid);
 		if (!p)
 			goto err_unlock;
@@ -157,7 +157,7 @@
 		    !capable(CAP_SYS_PTRACE))
 			goto err_unlock;
 		head = p->compat_robust_list;
-		read_unlock(&tasklist_lock);
+		rcu_read_unlock();
 	}
 
 	if (put_user(sizeof(*head), len_ptr))
@@ -165,7 +165,7 @@
 	return put_user(ptr_to_compat(head), head_ptr);
 
 err_unlock:
-	read_unlock(&tasklist_lock);
+	rcu_read_unlock();
 
 	return ret;
 }