Defined in 2 files as a macro:

• include/asm-generic/barrier.h, line 201 (as a macro)
• tools/virtio/asm/barrier.h, line 4 (as a macro)

Referenced in 3 files:

• drivers/xen/events/events_fifo.c, line 299
• drivers/xen/xenbus/xenbus_comms.c, line 183
• include/linux/virtio_ring.h, line 35