2.5.19 - raid1 erros on compile

I have problems compiling kernel with raid1 support.

Any idea?

thanks

make[2]: Entering directory `/usr/src/linux-2.5.19/drivers/md'
gcc -D__KERNEL__ -I/usr/src/linux-2.5.19/include -Wall -Wstrict-prototypes 
-Wno-trigraphs -O2 -fomit-frame-pointer -fno-strict-aliasing -fno-common 
-pipe -mpreferred-stack-boundary=2 
-march=i686    -DKBUILD_BASENAME=raid1  -c -o raid1.o raid1.c
raid1.c: In function `device_barrier':
raid1.c:412: `tq_disk' undeclared (first use in this function)
raid1.c:412: (Each undeclared identifier is reported only once
raid1.c:412: for each function it appears in.)
raid1.c: In function `make_request':
raid1.c:449: `tq_disk' undeclared (first use in this function)
raid1.c: In function `close_sync':
raid1.c:651: `tq_disk' undeclared (first use in this function)
make[2]: *** [raid1.o] Error 1
make[2]: Leaving directory `/usr/src/linux-2.5.19/drivers/md'
make[1]: *** [_subdir_md] Error 2
make[1]: Leaving directory `/usr/src/linux-2.5.19/drivers'
make: *** [drivers] Error 2