uaccess: remove CONFIG_SET_FS

[linux-block.git] / kernel / kthread.c

diff --git a/kernel/kthread.c b/kernel/kthread.c
index 38c6dd822da87e9ccff4613402e7683cd92e7338..16c2275d4b508700f21562b85cd515b2c42f6914 100644 (file)
--- a/kernel/kthread.c
+++ b/kernel/kthread.c
@@ -55,7 +55,6 @@ struct kthread {
        int result;
        int (*threadfn)(void *);
        void *data;
-       mm_segment_t oldfs;
        struct completion parked;
        struct completion exited;
 #ifdef CONFIG_BLK_CGROUP
@@ -1441,8 +1440,6 @@ void kthread_use_mm(struct mm_struct *mm)
                mmdrop(active_mm);
        else
                smp_mb();
-
-       to_kthread(tsk)->oldfs = force_uaccess_begin();
 }
 EXPORT_SYMBOL_GPL(kthread_use_mm);
 
@@ -1457,8 +1454,6 @@ void kthread_unuse_mm(struct mm_struct *mm)
        WARN_ON_ONCE(!(tsk->flags & PF_KTHREAD));
        WARN_ON_ONCE(!tsk->mm);
 
-       force_uaccess_end(to_kthread(tsk)->oldfs);
-
        task_lock(tsk);
        /*
         * When a kthread stops operating on an address space, the loop