• Michel Lespinasse's avatar
    mm: interval tree updates · 9826a516
    Michel Lespinasse authored
    Update the generic interval tree code that was introduced in "mm: replace
    vma prio_tree with an interval tree".
    
    Changes:
    
    - fixed 'endpoing' typo noticed by Andrew Morton
    
    - replaced include/linux/interval_tree_tmpl.h, which was used as a
      template (including it automatically defined the interval tree
      functions) with include/linux/interval_tree_generic.h, which only
      defines a preprocessor macro INTERVAL_TREE_DEFINE(), which itself
      defines the interval tree functions when invoked. Now that is a very
      long macro which is unfortunate, but it does make the usage sites
      (lib/interval_tree.c and mm/interval_tree.c) a bit nicer than previously.
    
    - make use of RB_DECLARE_CALLBACKS() in the INTERVAL_TREE_DEFINE() macro,
      instead of duplicating that code in the interval tree template.
    
    - replaced vma_interval_tree_add(), which was actually handling the
      nonlinear and interval tree cases, with vma_interval_tree_insert_after()
      which handles only the interval tree case and has an API that is more
      consistent with the other interval tree handling functions.
      The nonlinear case is now handled explicitly in kernel/fork.c dup_mmap().
    Signed-off-by: default avatarMichel Lespinasse <walken@google.com>
    Cc: Andrea Arcangeli <aarcange@redhat.com>
    Cc: Rik van Riel <riel@redhat.com>
    Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
    Cc: Daniel Santos <daniel.santos@pobox.com>
    Cc: Hugh Dickins <hughd@google.com>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    9826a516
interval_tree_generic.h 6.96 KB