diff options
Diffstat (limited to 'kernel/torture.c')
| -rw-r--r-- | kernel/torture.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/kernel/torture.c b/kernel/torture.c index c82c70f7828e..f05042036ae8 100644 --- a/kernel/torture.c +++ b/kernel/torture.c @@ -49,6 +49,11 @@ MODULE_LICENSE("GPL"); MODULE_AUTHOR("Paul E. McKenney <paulmck@us.ibm.com>"); +int fullstop = FULLSTOP_RMMOD; +EXPORT_SYMBOL_GPL(fullstop); +DEFINE_MUTEX(fullstop_mutex); +EXPORT_SYMBOL_GPL(fullstop_mutex); + #define TORTURE_RANDOM_MULT 39916801 /* prime */ #define TORTURE_RANDOM_ADD 479001701 /* prime */ #define TORTURE_RANDOM_REFRESH 10000 @@ -69,3 +74,18 @@ torture_random(struct torture_random_state *trsp) return swahw32(trsp->trs_state); } EXPORT_SYMBOL_GPL(torture_random); + +/* + * Absorb kthreads into a kernel function that won't return, so that + * they won't ever access module text or data again. + */ +void torture_shutdown_absorb(const char *title) +{ + while (ACCESS_ONCE(fullstop) == FULLSTOP_SHUTDOWN) { + pr_notice( + "torture thread %s parking due to system shutdown\n", + title); + schedule_timeout_uninterruptible(MAX_SCHEDULE_TIMEOUT); + } +} +EXPORT_SYMBOL_GPL(torture_shutdown_absorb); |