if (addr + mm->cached_hole_size < vma->vm_start) mm->cached_hole_size = vma->vm_start - addr; 
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;#ifdef CONFIG_CPU_V6	unsigned int cache_type;	int do_align = 0, aliasing = 0;	/*	 * We only need to do colour alignment if either the I or D	 * caches alias.  This is indicated by bits 9 and 21 of the	 * cache type register.	 */	cache_type = read_cpuid(CPUID_CACHETYPE);	if (cache_type != read_cpuid(CPUID_ID)) {		aliasing = (cache_type | cache_type >> 12) & (1 << 11);		if (aliasing)			do_align = filp || flags & MAP_SHARED;	}#else#define do_align 0#define aliasing 0#endif	/*	 * We should enforce the MAP_FIXED case.  However, currently	 * the generic kernel code doesn't allow us to handle this.	 */	if (flags & MAP_FIXED) {		if (aliasing && flags & MAP_SHARED && addr & (SHMLBA - 1))			return -EINVAL;		return addr;	}	if (len > TASK_SIZE)		return -ENOMEM;	if (addr) {		if (do_align)			addr = COLOUR_ALIGN(addr, pgoff);		else			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:	if (do_align)		addr = COLOUR_ALIGN(addr, pgoff);	else		addr = PAGE_ALIGN(addr);	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;		if (do_align)			addr = COLOUR_ALIGN(addr, pgoff);	}}
4520	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4520/1363c3cd8603a913a27e2995dccbd70d5312d8e6/mmap.c/buggy/arch/arm/mm/mmap.c