Bug#465186: ocp: Should not use PAGESIZE in the source code
The source code uses PAGESIZE from the system or fallsback to
hardcoding it to 4096 (which is what will happen on currently).
This is wrong as the size is not static and is only known at runtime.
The Linux kernel headers were fixed recently to stop exporting this
variable as this should not have been exported ever. The code should
switch to use 'sysconf(_SC_PAGESIZE)' instead.