Problem compiling kernel 2.6.11.2

[j...@invalid.address]

I got a copy of the full kernel 2.6.11.2 source. When I try to compile
it exits with

CC arch/i386/kernel/process.o
{standard input}: Assembler messages:
{standard input}:1463: Error: suffix or operands invalid for `mov'
{standard input}:1465: Error: suffix or operands invalid for `mov'
{standard input}:1782: Error: suffix or operands invalid for `mov'
{standard input}:1784: Error: suffix or operands invalid for `mov'
{standard input}:1885: Error: suffix or operands invalid for `mov'
{standard input}:1886: Error: suffix or operands invalid for `mov'
{standard input}:2025: Error: suffix or operands invalid for `mov'
{standard input}:2027: Error: suffix or operands invalid for `mov'
{standard input}:2175: Error: suffix or operands invalid for `mov'
{standard input}:2188: Error: suffix or operands invalid for `mov'
make[1]: *** [arch/i386/kernel/process.o] Error 1
make: *** [arch/i386/kernel] Error 2

From looking around on google it seems that there's a problem in
binutils. I've tried upgrading (yum upgrade) to 2.16.91.0.6-5, but
same thing happens.

Is binutils the problem, or what? This is Fedora Core 5, fresh
install. I'm trying to downshift the kernel from 2.6.15-1.2054_FC5.

Any help would be much appreciated.

Joe