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linux-headers: update

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This updates linux-headers against master 4.1-rc1 (commit
b787f68c36d49bb1d9236f403813641efa74a031).

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Cornelia Huck 2015-03-31 16:07:08 +02:00
parent 217a4acb21
commit 7a52ce8a16
10 changed files with 291 additions and 66 deletions
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28
include/standard-headers/linux/virtio_balloon.h
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@ -25,6 +25,7 @@
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE. */
#include "standard-headers/linux/types.h"
#include "standard-headers/linux/virtio_ids.h"
#include "standard-headers/linux/virtio_config.h"
@ -51,9 +52,32 @@ struct virtio_balloon_config {
#define VIRTIO_BALLOON_S_MEMTOT 5 /* Total amount of memory */
#define VIRTIO_BALLOON_S_NR 6
/*
* Memory statistics structure.
* Driver fills an array of these structures and passes to device.
*
* NOTE: fields are laid out in a way that would make compiler add padding
* between and after fields, so we have to use compiler-specific attributes to
* pack it, to disable this padding. This also often causes compiler to
* generate suboptimal code.
*
* We maintain this statistics structure format for backwards compatibility,
* but don't follow this example.
*
* If implementing a similar structure, do something like the below instead:
* struct virtio_balloon_stat {
* __virtio16 tag;
* uint8_t reserved[6];
* __virtio64 val;
* };
*
* In other words, add explicit reserved fields to align field and
* structure boundaries at field size, avoiding compiler padding
* without the packed attribute.
*/
struct virtio_balloon_stat {
uint16_t tag;
uint64_t val;
__virtio16 tag;
__virtio64 val;
} QEMU_PACKED;
#endif /* _LINUX_VIRTIO_BALLOON_H */