Commit 8a0c9705 authored by Vasily Gorbik's avatar Vasily Gorbik
Browse files

s390/test_unwind: add "backtrace" module parameter 



By default no backtraces are printed when a test succeeds, but sometimes
it is useful to spot issues automated test doesn't cover. Add "backtrace"
module parameter to force it.

Signed-off-by: default avatarVasily Gorbik <gor@linux.ibm.com>
parent 93bd3232

arch/s390/lib/test_unwind.c

+5 −1
Original line number Diff line number Diff line
@@ -20,6 +20,10 @@ static struct kunit *current_test; 


#define BT_BUF_SIZE (PAGE_SIZE * 4)



static bool force_bt;

module_param_named(backtrace, force_bt, bool, 0444);

MODULE_PARM_DESC(backtrace, "print backtraces for all tests");



/*

 * To avoid printk line limit split backtrace by lines

 */
@@ -98,7 +102,7 @@ static noinline int test_unwind(struct task_struct *task, struct pt_regs *regs, 
		kunit_err(current_test, "Maximum number of frames exceeded\n");

		ret = -EINVAL;

	}

	if (ret)

	if (ret || force_bt)

		print_backtrace(bt);

	kfree(bt);

	return ret;