drivers/xen/blktap/xenbus.c:71: warning: passing argument 1 of 'xenbus_exists' makes integer from pointer without a cast
drivers/xen/blktap/xenbus.c:71: error: too few arguments to function 'xenbus_exists'
drivers/xen/blktap/xenbus.c:72: warning: passing argument 1 of 'xenbus_rm' makes integer from pointer without a cast
drivers/xen/blktap/xenbus.c:72: error: too few arguments to function 'xenbus_rm'
drivers/xen/blktap/xenbus.c:80: warning: passing argument 1 of 'xenbus_gather' makes integer from pointer without a cast
drivers/xen/blktap/xenbus.c:96: warning: implicit declaration of function 'xenbus_dev_ok'
drivers/xen/blktap/xenbus.c:101: error: too few arguments to function 'xenbus_transaction_end'
drivers/xen/blktap/xenbus.c: In function 'blkback_probe':
drivers/xen/blktap/xenbus.c:154: warning: passing argument 1 of 'xenbus_gather' makes integer from pointer without a cast
drivers/xen/blktap/xenbus.c:163: warning: passing argument 1 of 'xenbus_exists' makes integer from pointer without a cast
drivers/xen/blktap/xenbus.c:163: error: too few arguments to function 'xenbus_exists'
make[3]: *** [drivers/xen/blktap/xenbus.o] Error 1
make[2]: *** [drivers/xen/blktap] Error 2
make[1]: *** [drivers/xen] Error 2