dm block manager: cleanup code that prints stacktrace

There is no need to record stack trace and immediately print it.  Just
use dump_stack() to print the current stack.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

1 files changed, 1 insertions, 10 deletions

diff --git a/drivers/md/persistent-data/dm-block-manager.c b/drivers/md/persistent-data/dm-block-manager.c
index f2393ba838eb..1e33dd51c21f 100644
--- a/drivers/md/persistent-data/dm-block-manager.c
+++ b/drivers/md/persistent-data/dm-block-manager.c
@@ -97,10 +97,6 @@ static void __del_holder(struct block_lock *lock, struct task_struct *task)
 static int __check_holder(struct block_lock *lock)
 {
         unsigned i;
-#ifdef CONFIG_DM_DEBUG_BLOCK_STACK_TRACING
-        static struct stack_trace t;
-        static stack_entries entries;
-#endif
 
         for (i = 0; i < MAX_HOLDERS; i++) {
                 if (lock->holders[i] == current) {
@@ -110,12 +106,7 @@ static int __check_holder(struct block_lock *lock)
                         print_stack_trace(lock->traces + i, 4);
 
                         DMERR("subsequent acquisition attempted here:");
-                        t.nr_entries = 0;
-                        t.max_entries = MAX_STACK;
-                        t.entries = entries;
-                        t.skip = 3;
-                        save_stack_trace(&t);
-                        print_stack_trace(&t, 4);
+                        dump_stack();
 #endif
                         return -EINVAL;
                 }