void flush_tlb_page()

in mm/tlb.c [135:166]

• 28 lines of code
• 2 McCabe index (conditional complexity)

void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
{
	int newpid = cpu_asid(vma->vm_mm);

	addr &= TLB_ENTRY_SIZE_MASK;

#ifdef CONFIG_CPU_HAS_TLBI
	sync_is();
	asm volatile(
		"tlbi.vas %0	\n"
		"sync.i		\n"
		:
		: "r" (addr | newpid)
		: "memory");
#else
	{
	int oldpid, idx;
	unsigned long flags;

	local_irq_save(flags);
	oldpid = read_mmu_entryhi() & ASID_MASK;
	write_mmu_entryhi(addr | newpid);
	tlb_probe();
	idx = read_mmu_index();
	if (idx >= 0)
		tlb_invalid_indexed();

	restore_asid_inv_utlb(oldpid, newpid);
	local_irq_restore(flags);
	}
#endif
}