diff options
| -rw-r--r-- | drivers/misc/lkdtm/bugs.c | 30 | ||||
| -rw-r--r-- | tools/testing/selftests/lkdtm/tests.txt | 1 |
2 files changed, 31 insertions, 0 deletions
diff --git a/drivers/misc/lkdtm/bugs.c b/drivers/misc/lkdtm/bugs.c index 5178c02b21eb..62ba01525479 100644 --- a/drivers/misc/lkdtm/bugs.c +++ b/drivers/misc/lkdtm/bugs.c @@ -286,6 +286,35 @@ static void lkdtm_HARDLOCKUP(void) cpu_relax(); } +static void __lkdtm_SMP_CALL_LOCKUP(void *unused) +{ + for (;;) + cpu_relax(); +} + +static void lkdtm_SMP_CALL_LOCKUP(void) +{ + unsigned int cpu, target; + + cpus_read_lock(); + + cpu = get_cpu(); + target = cpumask_any_but(cpu_online_mask, cpu); + + if (target >= nr_cpu_ids) { + pr_err("FAIL: no other online CPUs\n"); + goto out_put_cpus; + } + + smp_call_function_single(target, __lkdtm_SMP_CALL_LOCKUP, NULL, 1); + + pr_err("FAIL: did not hang\n"); + +out_put_cpus: + put_cpu(); + cpus_read_unlock(); +} + static void lkdtm_SPINLOCKUP(void) { /* Must be called twice to trigger. */ @@ -680,6 +709,7 @@ static struct crashtype crashtypes[] = { CRASHTYPE(UNALIGNED_LOAD_STORE_WRITE), CRASHTYPE(SOFTLOCKUP), CRASHTYPE(HARDLOCKUP), + CRASHTYPE(SMP_CALL_LOCKUP), CRASHTYPE(SPINLOCKUP), CRASHTYPE(HUNG_TASK), CRASHTYPE(OVERFLOW_SIGNED), diff --git a/tools/testing/selftests/lkdtm/tests.txt b/tools/testing/selftests/lkdtm/tests.txt index 368973f05250..cff124c1eddd 100644 --- a/tools/testing/selftests/lkdtm/tests.txt +++ b/tools/testing/selftests/lkdtm/tests.txt @@ -31,6 +31,7 @@ SLAB_FREE_CROSS SLAB_FREE_PAGE #SOFTLOCKUP Hangs the system #HARDLOCKUP Hangs the system +#SMP_CALL_LOCKUP Hangs the system #SPINLOCKUP Hangs the system #HUNG_TASK Hangs the system EXEC_DATA |