diff options
Diffstat (limited to 'mm/mmap.c')
| -rw-r--r-- | mm/mmap.c | 23 |
1 files changed, 6 insertions, 17 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index d931d7e49ac..fa35323a3c5 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -203,14 +203,6 @@ static struct vm_area_struct *remove_vma(struct vm_area_struct *vma) { struct vm_area_struct *next = vma->vm_next; - /* - * Hide vma from rmap and vmtruncate before freeing page tables: - * to be moved into free_pgtables once page_table_lock is lifted - * from it, but until then lock ordering forbids that move. - */ - anon_vma_unlink(vma); - unlink_file_vma(vma); - might_sleep(); if (vma->vm_ops && vma->vm_ops->close) vma->vm_ops->close(vma); @@ -1679,15 +1671,15 @@ static void unmap_region(struct mm_struct *mm, unsigned long nr_accounted = 0; lru_add_drain(); - spin_lock(&mm->page_table_lock); tlb = tlb_gather_mmu(mm, 0); update_hiwater_rss(mm); + spin_lock(&mm->page_table_lock); unmap_vmas(&tlb, mm, vma, start, end, &nr_accounted, NULL); + spin_unlock(&mm->page_table_lock); vm_unacct_memory(nr_accounted); free_pgtables(&tlb, vma, prev? prev->vm_end: FIRST_USER_ADDRESS, next? next->vm_start: 0); tlb_finish_mmu(tlb, start, end); - spin_unlock(&mm->page_table_lock); } /* @@ -1962,23 +1954,20 @@ void exit_mmap(struct mm_struct *mm) unsigned long end; lru_add_drain(); - - spin_lock(&mm->page_table_lock); - flush_cache_mm(mm); tlb = tlb_gather_mmu(mm, 1); /* Don't update_hiwater_rss(mm) here, do_exit already did */ /* Use -1 here to ensure all VMAs in the mm are unmapped */ + spin_lock(&mm->page_table_lock); end = unmap_vmas(&tlb, mm, vma, 0, -1, &nr_accounted, NULL); + spin_unlock(&mm->page_table_lock); vm_unacct_memory(nr_accounted); free_pgtables(&tlb, vma, FIRST_USER_ADDRESS, 0); tlb_finish_mmu(tlb, 0, end); - spin_unlock(&mm->page_table_lock); - /* - * Walk the list again, actually closing and freeing it - * without holding any MM locks. + * Walk the list again, actually closing and freeing it, + * with preemption enabled, without holding any MM locks. */ while (vma) vma = remove_vma(vma); |