fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / include / asm-x86 / mmu_context_32.h
blob7eb0b0b1fb3c3e24899eaa3ba0fa378857f77e62
1 #ifndef __I386_SCHED_H
2 #define __I386_SCHED_H
4 #include <asm/desc.h>
5 #include <asm/atomic.h>
6 #include <asm/pgalloc.h>
7 #include <asm/tlbflush.h>
8 #include <asm/paravirt.h>
9 #ifndef CONFIG_PARAVIRT
10 #include <asm-generic/mm_hooks.h>
12 static inline void paravirt_activate_mm(struct mm_struct *prev,
13 struct mm_struct *next)
16 #endif /* !CONFIG_PARAVIRT */
20 * Used for LDT copy/destruction.
22 int init_new_context(struct task_struct *tsk, struct mm_struct *mm);
23 void destroy_context(struct mm_struct *mm);
26 static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
28 #ifdef CONFIG_SMP
29 unsigned cpu = smp_processor_id();
30 if (per_cpu(cpu_tlbstate, cpu).state == TLBSTATE_OK)
31 per_cpu(cpu_tlbstate, cpu).state = TLBSTATE_LAZY;
32 #endif
35 void leave_mm(unsigned long cpu);
37 static inline void switch_mm(struct mm_struct *prev,
38 struct mm_struct *next,
39 struct task_struct *tsk)
41 int cpu = smp_processor_id();
43 if (likely(prev != next)) {
44 /* stop flush ipis for the previous mm */
45 cpu_clear(cpu, prev->cpu_vm_mask);
46 #ifdef CONFIG_SMP
47 per_cpu(cpu_tlbstate, cpu).state = TLBSTATE_OK;
48 per_cpu(cpu_tlbstate, cpu).active_mm = next;
49 #endif
50 cpu_set(cpu, next->cpu_vm_mask);
52 /* Re-load page tables */
53 load_cr3(next->pgd);
56 * load the LDT, if the LDT is different:
58 if (unlikely(prev->context.ldt != next->context.ldt))
59 load_LDT_nolock(&next->context);
61 #ifdef CONFIG_SMP
62 else {
63 per_cpu(cpu_tlbstate, cpu).state = TLBSTATE_OK;
64 BUG_ON(per_cpu(cpu_tlbstate, cpu).active_mm != next);
66 if (!cpu_test_and_set(cpu, next->cpu_vm_mask)) {
67 /* We were in lazy tlb mode and leave_mm disabled
68 * tlb flush IPI delivery. We must reload %cr3.
70 load_cr3(next->pgd);
71 load_LDT_nolock(&next->context);
74 #endif
77 #define deactivate_mm(tsk, mm) \
78 asm("movl %0,%%gs": :"r" (0));
80 #define activate_mm(prev, next) \
81 do { \
82 paravirt_activate_mm(prev, next); \
83 switch_mm((prev),(next),NULL); \
84 } while(0);
86 #endif