diff options
Diffstat (limited to 'mm/mmap.c')
| -rw-r--r-- | mm/mmap.c | 32 |
1 files changed, 2 insertions, 30 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index 1e8fdb0b51ed..64b5985b5295 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -2674,6 +2674,8 @@ detach_vmas_to_be_unmapped(struct mm_struct *mm, struct vm_area_struct *vma, vma->vm_prev = NULL; do { vma_rb_erase(vma, &mm->mm_rb); + if (vma->vm_flags & VM_LOCKED) + mm->locked_vm -= vma_pages(vma); mm->map_count--; tail_vma = vma; vma = vma->vm_next; @@ -2778,22 +2780,6 @@ int split_vma(struct mm_struct *mm, struct vm_area_struct *vma, return __split_vma(mm, vma, addr, new_below); } -static inline void -unlock_range(struct vm_area_struct *start, unsigned long limit) -{ - struct mm_struct *mm = start->vm_mm; - struct vm_area_struct *tmp = start; - - while (tmp && tmp->vm_start < limit) { - if (tmp->vm_flags & VM_LOCKED) { - mm->locked_vm -= vma_pages(tmp); - munlock_vma_pages_all(tmp); - } - - tmp = tmp->vm_next; - } -} - /* Munmap is split into 2 main parts -- this part which finds * what needs doing, and the areas themselves, which do the * work. This now handles partial unmappings. @@ -2874,12 +2860,6 @@ int __do_munmap(struct mm_struct *mm, unsigned long start, size_t len, return error; } - /* - * unlock any mlock()ed ranges before detaching vmas - */ - if (mm->locked_vm) - unlock_range(vma, end); - /* Detach vmas from rbtree */ if (!detach_vmas_to_be_unmapped(mm, vma, prev, end)) downgrade = false; @@ -3147,20 +3127,12 @@ void exit_mmap(struct mm_struct *mm) * Nothing can be holding mm->mmap_lock here and the above call * to mmu_notifier_release(mm) ensures mmu notifier callbacks in * __oom_reap_task_mm() will not block. - * - * This needs to be done before calling unlock_range(), - * which clears VM_LOCKED, otherwise the oom reaper cannot - * reliably test it. */ (void)__oom_reap_task_mm(mm); - set_bit(MMF_OOM_SKIP, &mm->flags); } mmap_write_lock(mm); - if (mm->locked_vm) - unlock_range(mm->mmap, ULONG_MAX); - arch_exit_mmap(mm); vma = mm->mmap; |