The biggest new feature is fixed 32bit vsyscall (SYSCALL+SYSENTER)
support, mostly from Jakub Jelinek.  This increases 32bit syscall
performance greatly (latency halved and better).  The SYSENTER for Intel
support required some infrastructure changes, but seems to work now too.

The 64bit vsyscall vtime() just references xtime.tv_sec now.  This
should make it a lot faster too.

A fix for some Intel IA32e systems.  Also a few long standing bugs in
NMI like exception handlers were fixed.

And a lot of other bug fixes.

Full changeLog:
 - Clean up 32bit address room limit handling, fix 3gb personality
 - Move memcpy_{from,to}io export to ksyms.c file. This seems to work
   around a toolchain bug (Andreas Gruenbacher)
 - Update defconfig
 - ACPI merges from i386 (SBF should work now, acpi=strict)
 - Implement mmconfig support based on i386 code (untested)
 - Fix i386/x86-64 pci source file sharing
 - Implement ptrace access for 32bit vsyscall page
 - Always initialize all 32bit SYSENTER/SYSCALL MSRs.
 - Export run time cache line size to generic kernel
 - Remove explicit CPUID in ia32 syscall code
 - Fill in most of boot_cpu_data early
 - Remove unused PER_LINUX32 setup
 - Fix syscall trace in fast 32bit calls (Suresh B. Siddha)
 - Tighten first line of the oops again.
 - Set up ptrace registers correctly for debug,ss,double fault exceptions
 - Fix 64bit bug in sys_time64
 - Optimize time syscall/vsyscall to only read xtime
 - Fix csum_partial_copy_nocheck
 - Remove last traces of FPU emulation
 - Check properly for rescheduling in exceptions with own stack
 - Harden exception stack entries (#SS,#NMI,#MC,#DF,#DB) against bogus GS
 - Use an exception stack for machine checks
 - Handle TIF_SINGLESTEP properly in kernel exit
 - Add exception stack for debug handler
 - Disable X86_HT for Opteron optimized builds because it pulls in ACPI_BOOT
 - Fix CONFIG_ACPI_BOOT compilation without CONFIG_ACPI
 - Fix eflags handling in SYSENTER path (Jakub Jelinek)
 - Use atomic counter for enable/disable_hlt
 - Support 32bit SYSENTER vsyscall too (Jakub Jelinek)
 - Don't redefine Dprintk
 - Change some cpu/apic id arrays to char
 - Support arbitary cpu<->apicid in hard_smp_processor_id (Surresh B Sidda)
 - Move K8 erratum #100 workaround into slow path of page fault handler.
 - Fix 32bit cdrom direct access ioctls (Jens Axboe)
 - Enable 32bit vsyscalls by default
 - Fix 32bit vsyscalls (Jakub Jelinek)