Hello,

we recently obtained the oops below in restore_fpu() which makes us 
believe that there was lost correct masking of the hardcoded constant:
0x1f80 with mxcsr_feature_mask in init_fpu().
Can someone check that patch attached?

general protection fault: 0000 [#1]
SMP
Modules linked in: e100 mii ipt_length ipt_ttl ipt_tcpmss ipt_TCPMSS 
iptable_mangle iptable_filter ipt_multiport ipt_limit ipt_tos ipt_REJECT 
ip_tables
CPU:    1
EIP:    0060:[<c010cc80>]    Tainted:  P
EFLAGS: 00010206   (2.6.8-dev-smp)
EIP is at restore_fpu+0x10/0x20
eax: 0383fbff   ebx: c34178ec   ecx: 00000000   edx: c34178ec
esi: ce163000   edi: 00000067   ebp: bffffcd8   esp: ce163fb0
ds: 007b   es: 007b   ss: 0068
Process cp (pid: 821, threadinfo=ce163000 task=c34178ec)
Stack: c0107298 c34178ec 08055038 08052ce4 c039ed70 08055038 00000031 
08055038
        08052ce4 00000067 bffffcd8 00000000 0000007b 0000007b ffffffff 
0804df06
        00000073 00010246 bffffcd8 0000007b
Call Trace:
  [<c0107298>] math_state_restore+0x28/0x50
  [<c039ed70>] device_not_available+0x24/0x29
Code: 0f ae 8a e0 02 00 00 c3 dd a2 e0 02 00 00 c3 90 a1 4c fb 3f