get_unmapped_area

["A. Supreeth Reddy" <supreeth.reddy@wipro.com>]

Hi All,

	The function which is used to get unmapped process address space sets
the "addr" to PAGE_OFFSET/3 i.e., 1 GB, in case addr equals NULL. Why is
the search started off at 1 GB ? Any specific reason for that ??

unsigned long get_unmapped_area(unsigned long addr, unsigned long len)
{
	struct vm_area_struct * vmm;

	if (len > TASK_SIZE)
		return 0;
	if (!addr)
		addr = TASK_UNMAPPED_BASE;
	addr = PAGE_ALIGN(addr);


Thanks in advance,
Supreeth.

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