C++ (Cpp) mlock_fixup_middle示例

示例#1

文件： mlock.c 项目： rohsaini/mkunity

static int mlock_fixup(struct vm_area_struct * vma, 
	unsigned long start, unsigned long end, unsigned int newflags)
{
	int pages, retval;

	if (newflags == vma->vm_flags)
		return 0;

	if (start == vma->vm_start) {
		if (end == vma->vm_end)
			retval = mlock_fixup_all(vma, newflags);
		else
			retval = mlock_fixup_start(vma, end, newflags);
	} else {
		if (end == vma->vm_end)
			retval = mlock_fixup_end(vma, start, newflags);
		else
			retval = mlock_fixup_middle(vma, start, end, newflags);
	}
	if (!retval) {
		/* keep track of amount of locked VM */
		pages = (end - start) >> PAGE_SHIFT;
		if (!(newflags & VM_LOCKED))
			pages = -pages;
		vma->vm_mm->locked_vm += pages;

#ifndef	CONFIG_OSFMACH3
		if ((newflags & VM_LOCKED) && (newflags & VM_READ))
			while (start < end) {
				int c = get_user((int *) start);
				__asm__ __volatile__("": :"r" (c));
				start += PAGE_SIZE;
			}
#endif	/* CONFIG_OSFMACH3 */
	}

示例#2

文件： mlock.c 项目： dmgerman/original

static int mlock_fixup(struct vm_area_struct * vma, 
	unsigned long start, unsigned long end, unsigned int newflags)
{
	int pages, retval;

	if (newflags == vma->vm_flags)
		return 0;

	if (start == vma->vm_start) {
		if (end == vma->vm_end)
			retval = mlock_fixup_all(vma, newflags);
		else
			retval = mlock_fixup_start(vma, end, newflags);
	} else {
		if (end == vma->vm_end)
			retval = mlock_fixup_end(vma, start, newflags);
		else
			retval = mlock_fixup_middle(vma, start, end, newflags);
	}
	if (!retval) {
		/* keep track of amount of locked VM */
		pages = (end - start) >> PAGE_SHIFT;
		if (newflags & VM_LOCKED) {
			pages = -pages;
			make_pages_present(start, end);
		}
		vma->vm_mm->locked_vm -= pages;
	}

示例#3

static int mlock_fixup(struct vm_area_struct * vma, 
	unsigned long start, unsigned long end, unsigned int newflags)
{
	int pages, retval;

	if (newflags == vma->vm_flags)
		return 0;

	if (start == vma->vm_start) {
		if (end == vma->vm_end)
			retval = mlock_fixup_all(vma, newflags);
		else
			retval = mlock_fixup_start(vma, end, newflags);
	} else {
		if (end == vma->vm_end)
			retval = mlock_fixup_end(vma, start, newflags);
		else
			retval = mlock_fixup_middle(vma, start, end, newflags);
	}
	if (!retval) {
		/* keep track of amount of locked VM */
		pages = (end - start) >> PAGE_SHIFT;
		if (!(newflags & VM_LOCKED))
			pages = -pages;
		vma->vm_mm->locked_vm += pages;
#ifdef CONFIG_SA1100_EMPEG
		if(newflags & (VM_READ | VM_WRITE | VM_EXEC))
#endif
		make_pages_present(start, end);
		//		printk("mlock_fixup: locked_vm = %d\n", vma->vm_mm->locked_vm);
	}