2.5.41 does not build: ipv6/addrconf.c: case label (htonln(something)) does not reduce to an integer constant

["Nicolás Lichtmaier" <nick@technisys.com.ar>]

  gcc -Wp,-MD,net/ipv6/.addrconf.o.d -D__KERNEL__ -Iinclude -Wall 
-Wstrict-prototypes -Wno-trigraphs -O2 -fomit-frame-pointer 
-fno-strict-aliasing -fno-common -pipe -mpreferred-stack-boundary=2 
-march=i686 -Iarch/i386/mach-generic -nostdinc -iwithprefix include 
-DMODULE   -DKBUILD_BASENAME=addrconf   -c -o net/ipv6/addrconf.o 
net/ipv6/addrconf.c
net/ipv6/addrconf.c: In function `ipv6_addr_type':
net/ipv6/addrconf.c:155: case label does not reduce to an integer constant
net/ipv6/addrconf.c:159: case label does not reduce to an integer constant
net/ipv6/addrconf.c:163: case label does not reduce to an integer constant
net/ipv6/addrconf.c:156: warning: unreachable code at beginning of 
switch statement
make[3]: *** [net/ipv6/addrconf.o] Error 1
make[2]: *** [net/ipv6] Error 2
make[1]: *** [net] Error 2
make[1]: Leaving directory `/home/nick/soft/linux-2.5.41'
make: *** [stamp-build] Error 2

In that line:
                switch((st & htonl(0x00FF0000))) {
                        case htonl(0x00010000):

Perhaps it's a matter of includes again.

Thanks!