[Qemu-devel] [PATCH] virtio-input: const_le16 and const_le32 not build time constant

[Michael Mueller <mimu@linux.vnet.ibm.com>]

As the implementation of const_le16 and const_le32 is not build time constant
on big endian systems this need to be fixed.

  CC    hw/input/virtio-input-hid.o
hw/input/virtio-input-hid.c:340:13: error: initializer element is not constant
hw/input/virtio-input-hid.c:340:13: error: (near initialization for ‘virtio_keyboard_config[1].u.ids.bustype’)
...

Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com>
---
 include/hw/virtio/virtio-input.h | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/include/hw/virtio/virtio-input.h b/include/hw/virtio/virtio-input.h
index a265519..bcee355 100644
--- a/include/hw/virtio/virtio-input.h
+++ b/include/hw/virtio/virtio-input.h
@@ -14,8 +14,14 @@ typedef struct virtio_input_config virtio_input_config;
 typedef struct virtio_input_event virtio_input_event;
 
 #if defined(HOST_WORDS_BIGENDIAN)
-# define const_le32(_x) bswap32(_x)
-# define const_le16(_x) bswap32(_x)
+# define const_le32(_x)                          \
+    (((_x & 0x000000ffU) << 24) |                \
+     ((_x & 0x0000ff00U) <<  8) |                \
+     ((_x & 0x00ff0000U) >>  8) |                \
+     ((_x & 0xff000000U) >> 24))
+# define const_le16(_x)                          \
+    (((_x & 0x00ff) << 8) |                      \
+     ((_x & 0xff00) >> 8))
 #else
 # define const_le32(_x) (_x)
 # define const_le16(_x) (_x)
-- 
1.8.3.1