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    SubjectRe: [PATCH 1/7] Introduce the pagetable_operations and associated helper macros.
    Adam Litke wrote:
    > On Wed, 2007-03-21 at 15:18 +1100, Nick Piggin wrote:
    >
    >>Adam Litke wrote:

    >>>diff --git a/include/linux/mm.h b/include/linux/mm.h
    >>>index 60e0e4a..7089323 100644
    >>>--- a/include/linux/mm.h
    >>>+++ b/include/linux/mm.h
    >>>@@ -98,6 +98,7 @@ struct vm_area_struct {
    >>>
    >>> /* Function pointers to deal with this struct. */
    >>> struct vm_operations_struct * vm_ops;
    >>>+ const struct pagetable_operations_struct * pagetable_ops;
    >>>
    >>> /* Information about our backing store: */
    >>> unsigned long vm_pgoff; /* Offset (within vm_file) in PAGE_SIZE
    >>
    >>Can you remind me why this isn't in vm_ops?
    >
    >
    > We didn't want to bloat the size of the vm_ops struct for all of its
    > users.

    But vmas are surely far more numerous than vm_ops, aren't they?

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