diff options
Diffstat (limited to 'kernel/bpf/percpu_freelist.c')
| -rw-r--r-- | kernel/bpf/percpu_freelist.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/kernel/bpf/percpu_freelist.c b/kernel/bpf/percpu_freelist.c index 6e090140b924..b367430e611c 100644 --- a/kernel/bpf/percpu_freelist.c +++ b/kernel/bpf/percpu_freelist.c @@ -25,12 +25,18 @@ void pcpu_freelist_destroy(struct pcpu_freelist *s) free_percpu(s->freelist); } +static inline void pcpu_freelist_push_node(struct pcpu_freelist_head *head, + struct pcpu_freelist_node *node) +{ + node->next = head->first; + head->first = node; +} + static inline void ___pcpu_freelist_push(struct pcpu_freelist_head *head, struct pcpu_freelist_node *node) { raw_spin_lock(&head->lock); - node->next = head->first; - head->first = node; + pcpu_freelist_push_node(head, node); raw_spin_unlock(&head->lock); } @@ -56,21 +62,16 @@ void pcpu_freelist_populate(struct pcpu_freelist *s, void *buf, u32 elem_size, u32 nr_elems) { struct pcpu_freelist_head *head; - unsigned long flags; int i, cpu, pcpu_entries; pcpu_entries = nr_elems / num_possible_cpus() + 1; i = 0; - /* disable irq to workaround lockdep false positive - * in bpf usage pcpu_freelist_populate() will never race - * with pcpu_freelist_push() - */ - local_irq_save(flags); for_each_possible_cpu(cpu) { again: head = per_cpu_ptr(s->freelist, cpu); - ___pcpu_freelist_push(head, buf); + /* No locking required as this is not visible yet. */ + pcpu_freelist_push_node(head, buf); i++; buf += elem_size; if (i == nr_elems) @@ -78,7 +79,6 @@ again: if (i % pcpu_entries) goto again; } - local_irq_restore(flags); } struct pcpu_freelist_node *__pcpu_freelist_pop(struct pcpu_freelist *s) |