bpf: use raw_spinlock_t in ringbuf

kernel/bpf/ringbuf.c

@@ -29,7 +29,7 @@ struct bpf_ringbuf {
  u64 mask;
  struct page **pages;
  int nr_pages;
- spinlock_t spinlock ____cacheline_aligned_in_smp;
+ raw_spinlock_t spinlock ____cacheline_aligned_in_smp;
  /* For user-space producer ring buffers, an atomic_t busy bit is used
  * to synchronize access to the ring buffers in the kernel, rather than
  * the spinlock that is used for kernel-producer ring buffers. This is
@@ -173,7 +173,7 @@ static struct bpf_ringbuf *bpf_ringbuf_alloc(size_t data_sz, int numa_node)
  if (!rb)
  return NULL;
 
- spin_lock_init(&rb->spinlock);
+ raw_spin_lock_init(&rb->spinlock);
  atomic_set(&rb->busy, 0);
  init_waitqueue_head(&rb->waitq);
  init_irq_work(&rb->work, bpf_ringbuf_notify);
@@ -421,10 +421,10 @@ static void *__bpf_ringbuf_reserve(struct bpf_ringbuf *rb, u64 size)
  cons_pos = smp_load_acquire(&rb->consumer_pos);
 
  if (in_nmi()) {
- if (!spin_trylock_irqsave(&rb->spinlock, flags))
+ if (!raw_spin_trylock_irqsave(&rb->spinlock, flags))
  return NULL;
  } else {
- spin_lock_irqsave(&rb->spinlock, flags);
+ raw_spin_lock_irqsave(&rb->spinlock, flags);
  }
 
  pend_pos = rb->pending_pos;
@@ -450,7 +450,7 @@ static void *__bpf_ringbuf_reserve(struct bpf_ringbuf *rb, u64 size)
  */
  if (new_prod_pos - cons_pos > rb->mask ||
  new_prod_pos - pend_pos > rb->mask) {
- spin_unlock_irqrestore(&rb->spinlock, flags);
+ raw_spin_unlock_irqrestore(&rb->spinlock, flags);
  return NULL;
  }
 
@@ -462,7 +462,7 @@ static void *__bpf_ringbuf_reserve(struct bpf_ringbuf *rb, u64 size)
  /* pairs with consumer's smp_load_acquire() */
  smp_store_release(&rb->producer_pos, new_prod_pos);
 
- spin_unlock_irqrestore(&rb->spinlock, flags);
+ raw_spin_unlock_irqrestore(&rb->spinlock, flags);
 
  return (void *)hdr + BPF_RINGBUF_HDR_SZ;
 }