include: Move endof() up from hw/virtio/virtio.h

endof() is a useful macro, we can make use of it outside of virtio.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 20191011152814.14791-2-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>

hw/block/virtio-blk.c

@@ -42,9 +42,9 @@
  */
 static VirtIOFeature feature_sizes[] = {
     {.flags = 1ULL << VIRTIO_BLK_F_DISCARD,
-     .end = virtio_endof(struct virtio_blk_config, discard_sector_alignment)},
+     .end = endof(struct virtio_blk_config, discard_sector_alignment)},
     {.flags = 1ULL << VIRTIO_BLK_F_WRITE_ZEROES,
-     .end = virtio_endof(struct virtio_blk_config, write_zeroes_may_unmap)},
+     .end = endof(struct virtio_blk_config, write_zeroes_may_unmap)},
     {}
 };
 

hw/net/virtio-net.c

@@ -90,15 +90,15 @@ static inline __virtio16 *virtio_net_rsc_ext_num_dupacks(
 
 static VirtIOFeature feature_sizes[] = {
     {.flags = 1ULL << VIRTIO_NET_F_MAC,
-     .end = virtio_endof(struct virtio_net_config, mac)},
+     .end = endof(struct virtio_net_config, mac)},
     {.flags = 1ULL << VIRTIO_NET_F_STATUS,
-     .end = virtio_endof(struct virtio_net_config, status)},
+     .end = endof(struct virtio_net_config, status)},
     {.flags = 1ULL << VIRTIO_NET_F_MQ,
-     .end = virtio_endof(struct virtio_net_config, max_virtqueue_pairs)},
+     .end = endof(struct virtio_net_config, max_virtqueue_pairs)},
     {.flags = 1ULL << VIRTIO_NET_F_MTU,
-     .end = virtio_endof(struct virtio_net_config, mtu)},
+     .end = endof(struct virtio_net_config, mtu)},
     {.flags = 1ULL << VIRTIO_NET_F_SPEED_DUPLEX,
-     .end = virtio_endof(struct virtio_net_config, duplex)},
+     .end = endof(struct virtio_net_config, duplex)},
     {}
 };
 

include/hw/virtio/virtio.h

@@ -37,13 +37,6 @@ static inline hwaddr vring_align(hwaddr addr,
     return QEMU_ALIGN_UP(addr, align);
 }
 
-/*
- * Calculate the number of bytes up to and including the given 'field' of
- * 'container'.
- */
-#define virtio_endof(container, field) \
-    (offsetof(container, field) + sizeof_field(container, field))
-
 typedef struct VirtIOFeature {
     uint64_t flags;
     size_t end;

include/qemu/compiler.h

@@ -60,6 +60,13 @@
 
 #define sizeof_field(type, field) sizeof(((type *)0)->field)
 
+/*
+ * Calculate the number of bytes up to and including the given 'field' of
+ * 'container'.
+ */
+#define endof(container, field) \
+    (offsetof(container, field) + sizeof_field(container, field))
+
 /* Convert from a base type to a parent type, with compile time checking.  */
 #ifdef __GNUC__
 #define DO_UPCAST(type, field, dev) ( __extension__ ( { \