diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/smp.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/kernel/smp.c b/kernel/smp.c index 03e6d576295d..6bbfabbe62fc 100644 --- a/kernel/smp.c +++ b/kernel/smp.c @@ -312,9 +312,10 @@ static DEFINE_PER_CPU_SHARED_ALIGNED(call_single_data_t, csd_data); void __smp_call_single_queue(int cpu, struct llist_node *node) { /* - * The list addition should be visible before sending the IPI - * handler locks the list to pull the entry off it because of - * normal cache coherency rules implied by spinlocks. + * The list addition should be visible to the target CPU when it pops + * the head of the list to pull the entry off it in the IPI handler + * because of normal cache coherency rules implied by the underlying + * llist ops. * * If IPIs can go out of order to the cache coherency protocol * in an architecture, sufficient synchronisation should be added |