CURRENT issue with /dev/cs

cc  -c -O2 -pipe -fno-strict-aliasing  -std=c99 -g -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  -nostdinc  -I. -I/usr/src/sys
-I/usr/src/sys/contrib/altq -I/usr/src/sys/contrib/libfdt -D_KERNEL
-DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h  -fno-omit-frame-pointer
-mno-omit-leaf-frame-pointer -mno-aes -mno-avx -mcmodel=kernel
-mno-red-zone -mno-mmx -mno-sse -msoft-float
 -fno-asynchronous-unwind-tables -ffreestanding -fstack-protector -Werror
 /usr/src/sys/dev/cs/if_cs.c
ctfconvert -L VERSION -g if_cs.o
cc  -c -O2 -pipe -fno-strict-aliasing  -std=c99 -g -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  -nostdinc  -I. -I/usr/src/sys
-I/usr/src/sys/contrib/altq -I/usr/src/sys/contrib/libfdt -D_KERNEL
-DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h  -fno-omit-frame-pointer
-mno-omit-leaf-frame-pointer -mno-aes -mno-avx -mcmodel=kernel
-mno-red-zone -mno-mmx -mno-sse -msoft-float
 -fno-asynchronous-unwind-tables -ffreestanding -fstack-protector -Werror
 /usr/src/sys/dev/cs/if_cs_isa.c
In file included from /usr/src/sys/dev/cs/if_cs_isa.c:48:
/usr/src/sys/dev/cs/if_csvar.h:68:17: error: field has incomplete type
'struct callout'
        struct callout timer;
                       ^
/usr/src/sys/dev/cs/if_csvar.h:68:9: note: forward declaration of 'struct
callout'
        struct callout timer;
               ^
1 error generated.
*** Error code 1

Stop.
bmake[2]: stopped in /usr/obj/usr/src/sys/GENERIC