There's a bug in the Makefile; it's 2.2.0pre7ac5, really.
Options used: -V (default)
-o /lib/modules/2.2.0-pre7-ac3/ (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-m /usr/src/kernel-source-2.2.0pre7ac5/System.map (specified)
-c 1 (default)
Unable to handle kernel NULL pointer dereference at virtual address 0000000f
current->tss.cr3 = 03a71000, %cr3 = 03a71000
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[<c011b54f>]
EFLAGS: 00010202
eax: c02c600b ebx: 00000000 ecx: 0000000b edx: 00000007
esi: c393110c edi: 00061c99 ebp: c1b8a000 esp: c2a75f00
ds: 0018 es: 0018 ss: 0018
Process xanim (pid: 231, process nr: 36, stackpage=c2a75000)
Stack: c025d3a0 00712000 00724000 c02c600b c011b9b2 c29dc1a0 00724000 00000000
00000400 4000e000 4000e400 c29dc1a0 00000400 00700000 00012000 00013000
00012000 00000000 00000002 00000001 00700000 c393110c c011bd48 c29dc1a0
Call Trace: [<c011b9b2>] [<c011bd48>] [<c011bc94>] [<c012338a>] [<c0108958>] [<c010002b>]
Code: 39 72 08 75 f4 8b 4c 24 10 39 4a 0c 75 eb 8d 42 14 ff 42 14
>>EIP: c011b54f <try_to_read_ahead+87/140>
Trace: c011b9b2 <do_generic_file_read+2ee/5d0>
Trace: c011bd48 <generic_file_read+64/80>
Trace: c011bc94 <file_read_actor+0/50>
Trace: c012338a <sys_read+be/dc>
Trace: c0108958 <system_call+34/38>
Trace: c010002b <startup_32+2b/11e>
Code: c011b54f <try_to_read_ahead+87/140> 00000000 <_EIP>: <===
Code: c011b54f <try_to_read_ahead+87/140> 0: 39 72 08 cmpl %esi,0x8(%edx) <===
Code: c011b552 <try_to_read_ahead+8a/140> 3: 75 f4 jne c011b548 <try_to_read_ahead+80/140>
Code: c011b554 <try_to_read_ahead+8c/140> 5: 8b 4c 24 10 movl 0x10(%esp,1),%ecx
Code: c011b558 <try_to_read_ahead+90/140> 9: 39 4a 0c cmpl %ecx,0xc(%edx)
Code: c011b55b <try_to_read_ahead+93/140> c: 75 eb jne c011b548 <try_to_read_ahead+80/140>
Code: c011b55d <try_to_read_ahead+95/140> e: 8d 42 14 leal 0x14(%edx),%eax
Code: c011b560 <try_to_read_ahead+98/140> 11: ff 42 14 incl 0x14(%edx)
1 warning issued. Results may not be reliable.
Warning in compare_ksyms_lsmod, module isofs is in lsmod but not in ksyms, probably no symbols exported
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