spin_acquire      417 include/linux/lockdep.h #  define spin_acquire(l, s, t, i)		lock_acquire(l, s, t, 0, 2, NULL, i)
spin_acquire      420 include/linux/lockdep.h #  define spin_acquire(l, s, t, i)		lock_acquire(l, s, t, 0, 1, NULL, i)
spin_acquire      425 include/linux/lockdep.h # define spin_acquire(l, s, t, i)		do { } while (0)