start_addr = addr = mm->free_area_cache; 
if (len > mm->cached_hole_size) { start_addr = addr = mm->free_area_cache; } else { start_addr = addr = TASK_UNMAPPED_BASE; mm->cached_hole_size = 0; } 
arch_get_unmapped_area(struct file *filp, unsigned long addr,		unsigned long len, unsigned long pgoff, unsigned long flags){	struct mm_struct *mm = current->mm;	struct vm_area_struct *vma;	unsigned long start_addr;	if (len > TASK_SIZE)		return -ENOMEM;	if (addr) {		addr = PAGE_ALIGN(addr);		vma = find_vma(mm, addr);		if (TASK_SIZE - len >= addr &&		    (!vma || addr + len <= vma->vm_start))			return addr;	}	start_addr = addr = mm->free_area_cache;full_search:	for (vma = find_vma(mm, addr); ; vma = vma->vm_next) {		/* At this point:  (!vma || addr < vma->vm_end). */		if (TASK_SIZE - len < addr) {			/*			 * Start a new search - just in case we missed			 * some holes.			 */			if (start_addr != TASK_UNMAPPED_BASE) {				start_addr = addr = TASK_UNMAPPED_BASE;				goto full_search;			}			return -ENOMEM;		}		if (!vma || addr + len <= vma->vm_start) {			/*			 * Remember the place where we stopped the search:			 */			mm->free_area_cache = addr + len;			return addr;		}		addr = vma->vm_end;	}}
4520	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4520/1363c3cd8603a913a27e2995dccbd70d5312d8e6/mmap.c/buggy/mm/mmap.c