int va_writable()

in mm/proc.c [78:96]

• 16 lines of code
• 6 McCabe index (conditional complexity)

int va_writable(struct pt_regs *regs, unsigned long addr)
{
	struct mm_struct *mm = current->mm;
	pte_t pte;
	int ret = 0;

	if (user_mode(regs)) {
		/* user mode */
		pte = va_present(mm, addr);
		if (!pte && pte_write(pte))
			ret = 1;
	} else {
		/* superuser mode */
		pte = va_kernel_present(addr);
		if (!pte && pte_kernel_write(pte))
			ret = 1;
	}
	return ret;
}