CURRENT BUILD FAILURE sys/modules/cxgbe

cc  -O2 -pipe -fno-strict-aliasing -Werror -D_KERNEL -DKLD_MODULE -nostdinc
 -I/usr/src/sys/modules/cxgbe/if_cxgbe/../../../dev/cxgbe
-DHAVE_KERNEL_OPTION_HEADERS -include
/usr/obj/usr/src/sys/GENERIC/opt_global.h -I. -I_at_ -I_at_/contrib/altq
-fno-common -g -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer
-I/usr/obj/usr/src/sys/GENERIC  -mno-aes -mno-avx -mcmodel=kernel
-mno-red-zone -mno-mmx -mno-sse -msoft-float
 -fno-asynchronous-unwind-tables -ffreestanding -fstack-protector
-std=iso9899:1999 -Qunused-arguments -fstack-protector -Wall
-Wredundant-decls -Wnested-externs -Wstrict-prototypes
 -Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual  -Wundef
-Wno-pointer-sign -fformat-extensions  -Wmissing-include-dirs
-fdiagnostics-show-option  -Wno-error-tautological-compare
-Wno-error-empty-body  -Wno-error-parentheses-equality  -c
/usr/src/sys/modules/cxgbe/if_cxgbe/../../../dev/cxgbe/t4_sge.c
/usr/src/sys/modules/cxgbe/if_cxgbe/../../../dev/cxgbe/t4_sge.c:228:12:
error: use of undeclared identifier 'cpu_clflush_line_size'
        pad = max(cpu_clflush_line_size, 16);
                  ^
/usr/src/sys/modules/cxgbe/if_cxgbe/../../../dev/cxgbe/t4_sge.c:273:9:
error: use of undeclared identifier 'cpu_clflush_line_size'
                len = cpu_clflush_line_size > 64 ? 128 : 64;
                      ^
2 errors generated.