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| author | Stephen Rothwell <sfr@canb.auug.org.au> | 2024-07-03 15:16:57 +1000 |
|---|---|---|
| committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2024-07-03 15:16:57 +1000 |
| commit | 4db850ca93b7267a129cc1756c6ad2aff809063c (patch) | |
| tree | e25beb2b37c5d7de4e5a87e43de61aeac1418c6e /drivers/misc | |
| parent | 1f544d715ead65889e30d8a84112ad065c38d322 (diff) | |
| parent | 350e853715b20a86afccde4b79b01109cd150bc5 (diff) | |
Merge branch 'for-next/kspp' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/lkdtm/bugs.c | 30 |
1 files changed, 30 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), |