ptr_ring: fix build

#define likely(x)    (__builtin_expect(!!(x), 1))

#define ALIGN(x, a) (((x) + (a) - 1) / (a) * (a))

#define SIZE_MAX        (~(size_t)0)

#define KMALLOC_MAX_SIZE SIZE_MAX

#define BUG_ON(x) assert(x)

typedef pthread_spinlock_t  spinlock_t;

		free(p);

}

#define kvmalloc_array kmalloc_array

#define kvfree kfree

static void spin_lock_init(spinlock_t *lock)

{

	int r = pthread_spin_init(lock, 0);