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mm: memory: remove ->vm_file check on shared writable vmas
Shared anonymous mmaps are implemented with shmem files, so all VMAs with shared writable semantics also have an underlying backing file. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Reviewed-by: Jan Kara <jack@suse.cz> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -2127,9 +2127,7 @@ reuse:
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balance_dirty_pages_ratelimited(mapping);
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}
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/* file_update_time outside page_lock */
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if (vma->vm_file)
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file_update_time(vma->vm_file);
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file_update_time(vma->vm_file);
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}
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put_page(dirty_page);
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if (page_mkwrite) {
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@ -2971,8 +2969,7 @@ static int do_shared_fault(struct mm_struct *mm, struct vm_area_struct *vma,
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balance_dirty_pages_ratelimited(mapping);
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}
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/* file_update_time outside page_lock */
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if (vma->vm_file && !vma->vm_ops->page_mkwrite)
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if (!vma->vm_ops->page_mkwrite)
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file_update_time(vma->vm_file);
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return ret;
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