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-rw-r--r--block/elevator.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/block/elevator.c b/block/elevator.c
index d00b283f31d2..9b72dc7c8a5c 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -27,7 +27,6 @@
#include <linux/blkdev.h>
#include <linux/elevator.h>
#include <linux/bio.h>
-#include <linux/config.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>
@@ -766,7 +765,8 @@ void elv_unregister(struct elevator_type *e)
read_lock(&tasklist_lock);
do_each_thread(g, p) {
task_lock(p);
- e->ops.trim(p->io_context);
+ if (p->io_context)
+ e->ops.trim(p->io_context);
task_unlock(p);
} while_each_thread(g, p);
read_unlock(&tasklist_lock);
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