diff options
| -rw-r--r-- | kernel/rcupdate.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/rcupdate.c b/kernel/rcupdate.c index afd21d17c081..f3240e987928 100644 --- a/kernel/rcupdate.c +++ b/kernel/rcupdate.c | |||
| @@ -214,6 +214,11 @@ static int rcuhead_fixup_free(void *addr, enum debug_obj_state state) | |||
| 214 | * Ensure that queued callbacks are all executed. | 214 | * Ensure that queued callbacks are all executed. |
| 215 | * If we detect that we are nested in a RCU read-side critical | 215 | * If we detect that we are nested in a RCU read-side critical |
| 216 | * section, we should simply fail, otherwise we would deadlock. | 216 | * section, we should simply fail, otherwise we would deadlock. |
| 217 | * Note that the machinery to reliably determine whether | ||
| 218 | * or not we are in an RCU read-side critical section | ||
| 219 | * exists only in the preemptible RCU implementations | ||
| 220 | * (TINY_PREEMPT_RCU and TREE_PREEMPT_RCU), which is why | ||
| 221 | * DEBUG_OBJECTS_RCU_HEAD is disallowed if !PREEMPT. | ||
| 217 | */ | 222 | */ |
| 218 | if (rcu_preempt_depth() != 0 || preempt_count() != 0 || | 223 | if (rcu_preempt_depth() != 0 || preempt_count() != 0 || |
| 219 | irqs_disabled()) { | 224 | irqs_disabled()) { |