4 static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
7 unsigned cpu = smp_processor_id();
8 if (per_cpu(cpu_tlbstate, cpu).state == TLBSTATE_OK)
9 per_cpu(cpu_tlbstate, cpu).state = TLBSTATE_LAZY;
13 static inline void switch_mm(struct mm_struct *prev,
14 struct mm_struct *next,
15 struct task_struct *tsk)
17 int cpu = smp_processor_id();
19 if (likely(prev != next)) {
20 /* stop flush ipis for the previous mm */
21 cpu_clear(cpu, prev->cpu_vm_mask);
23 per_cpu(cpu_tlbstate, cpu).state = TLBSTATE_OK;
24 per_cpu(cpu_tlbstate, cpu).active_mm = next;
26 cpu_set(cpu, next->cpu_vm_mask);
28 /* Re-load page tables */
32 * load the LDT, if the LDT is different:
34 if (unlikely(prev->context.ldt != next->context.ldt))
35 load_LDT_nolock(&next->context);
39 per_cpu(cpu_tlbstate, cpu).state = TLBSTATE_OK;
40 BUG_ON(per_cpu(cpu_tlbstate, cpu).active_mm != next);
42 if (!cpu_test_and_set(cpu, next->cpu_vm_mask)) {
43 /* We were in lazy tlb mode and leave_mm disabled
44 * tlb flush IPI delivery. We must reload %cr3.
47 load_LDT_nolock(&next->context);
53 #define deactivate_mm(tsk, mm) \
54 asm("movl %0,%%gs": :"r" (0));