if (flags & MAP_FIXED) { unsigned long ret; 
unsigned long ret; 
get_unmapped_area(struct file *file, unsigned long addr, unsigned long len,		unsigned long pgoff, unsigned long flags){	if (flags & MAP_FIXED) {		unsigned long ret;		if (addr > TASK_SIZE - len)			return -ENOMEM;		if (addr & ~PAGE_MASK)			return -EINVAL;		if (file && is_file_hugepages(file))  {			/*			 * Check if the given range is hugepage aligned, and			 * can be made suitable for hugepages.			 */			ret = prepare_hugepage_range(addr, len);		} else {			/*			 * Ensure that a normal request is not falling in a			 * reserved hugepage range.  For some archs like IA-64,			 * there is a separate region for hugepages.			 */			ret = is_hugepage_only_range(current->mm, addr, len);		}		if (ret)			return -EINVAL;		return addr;	}	if (file && file->f_op && file->f_op->get_unmapped_area)		return file->f_op->get_unmapped_area(file, addr, len,						pgoff, flags);	return current->mm->get_unmapped_area(file, addr, len, pgoff, flags);}
4520	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4520/07ab67c8d0d7c1021343b7d5c045033d6bf7be69/mmap.c/clean/mm/mmap.c