kernel security and bug fix update

[2.6.9-89.0.28.0.1.EL]

• [XEN] fix cpu hotplug crash (Joe Jin) [orabug 7521308]
• [XEN] Bring up vcpus before khelper init (Joe Jin) [orabug 7521308]
• [XEN] flush the tlb cache immediately (Dave McCracken, Scott Shi) [orabug 9138767]
• fix skb alignment that was causing sendto() to fail with EFAULT
  (Olaf Kirch) [orabug 6845794] - fix enomem due to larger mtu size page alloc (Zach Brown) [orabug 5486128]
• backout patch sysrq-b that queues upto keventd thread (Guru Anbalagane)
  [orabug 6125546]
• netrx/netpoll race avoidance (Tina Yang) [orabug 6143381]
• [XEN] Fix elf_core_dump (Tina Yang) [orabug 6995928]
• use lfence instead of cpuid instruction to implement memory barriers
  (Herbert van den Bergh) [orabug 7452412]
• add netpoll support to xen netfront (Tina Yang) [orabz 7261]
• [xen] execshield: fix endless GPF fault loop (Stephen Tweedie)
  [orabug 7175395]
• [xen]: port el5u2 patch that allows 64-bit PVHVM guest to boot with 32-bit
  dom0 [orabug 7452107] xenstore
• [mm] update shrink_zone patch to allow 100% swap utilization (John Sobecki,
  Chris Mason, Chuck Anderson, Dave McCracken) [orabug 7566319,6086839]
• [kernel] backport report_lost_ticks patch from EL5.2 (John Sobecki)
  [orabug 6110605]
• [xen] fix for hung JVM thread after #GPF [orabug 7916406] (Chuck Anderson)
• port EL5U3 patch to adjust totalhigh_pages in the balloon driver
  [orabug 8300888]
• check to see if hypervisor supports memory reservation change (Chuck Anderson) [orabug7556514]
• [XEN] use hypercall to fixmap pte updates (Mukesh Rathor) [orabug 8433329]
• fix oops in nlmclnt_mark_reclaim (Trond Myklebust) [orabug 8568878]
• [x86_64] Allowed machine_reboot running on boot_cpu (Joe Jin) [orabug 8425237]- FP register state is corrupted during the handling a SIGSEGV (Chuck Anderson)
  [orabug 7708133]
• [x86_64]: fix x86_64 largesmp kernel reboot hang (Joe Jin) [orabug bug9126592]- [nfs]: fix file attribute caching (Chuck Lever, Herbert van den Bergh)
  [orabug 8449921]
• [mm] revert patch #2042 (John Sobecki) [orabug 8895251]
• [x86_64] Add compat32 support for readahead and fadvise64 (John Haxby)
  [orabug 9458826]
• [XEN] free pte on hugetlb_prefault to avoid the clear_page race
  (Dave McCracken, Joe Jin) [orabug 9493665]
• [XEN] Flush tlb cache immediately to avoid clear_page race (Dave McCracken,
  Joe Jin) [orabug 9488844]
  [2.6.9-89.0.28]
  -sky2: fix 88e803x transmit lockup on Yukon-FE chipset (Don Howard) [617353 614559]
  -nfsd4: bug in read_buf when it is called to move over to next page (Jiri Olsa) [612032 612033] {CVE-2010-2521}
  -cifs: fix a kernel BUG with remote OS/2 server (Eugene Teo) [608585 608586] {CVE-2010-2248}
  [2.6.9-89.0.27]
  -sunrpc: Fix return value of rpc_call_async (Jeff Layton) [612962 577192]