#define TCMU_MAILBOX_VERSION 2
#define ALIGN_SIZE 64 /* Should be enough for most CPUs */
-/* See https://gcc.gnu.org/onlinedocs/cpp/Stringification.html */
-#define xstr(s) str(s)
-#define str(s) #s
-
struct tcmu_mailbox {
__u16 version;
__u16 flags;