[Patch] X86_64 TASK_SIZE cleanup

[Zou, Nanhai]

Hi,
   This patch will clean up the X86_64 compatibility mode TASK_SIZE
define thus fix some bugs found in X86_64 compatibility mode program.

Signed-off-by: Suresh Siddha <suresh.b.siddha@xxxxxxxxx> 
Signed-off-by: Zou Nan hai <Nanhai.zou@xxxxxxxxx>

Attachment: x86_64-compat-tasksize-fix.patch
Description: x86_64-compat-tasksize-fix.patch