#define __ver_vm_max_readahead	smp_f8c9aa3c
#define vm_max_readahead	_set_ver(vm_max_readahead)
#define __ver_vm_min_readahead	smp_41ef314d
#define vm_min_readahead	_set_ver(vm_min_readahead)
#define __ver_fail_writepage	smp_ac6b7ef8
#define fail_writepage	_set_ver(fail_writepage)