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a88cc108f6
lib/interval_tree.c provides a simple interface for an interval-tree
(an augmented red-black tree) but is only built when testing the generic
macros for building interval-trees. For drivers with modest needs,
export the simple interval-tree library as is.
v2: Lots of help from Michel Lespinasse to only compile the code
as required:
- make INTERVAL_TREE a config option
- make INTERVAL_TREE_TEST select the library functions
and sanitize the filenames & Makefile
- prepare interval_tree for being built as a module if required
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Michel Lespinasse <walken@google.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Michel Lespinasse <walken@google.com>
[Acked for inclusion via drm/i915 by Andrew Morton.]
[danvet: switch to _GPL as per the mailing list discussion.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
17 lines
495 B
C
17 lines
495 B
C
#include <linux/init.h>
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#include <linux/interval_tree.h>
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#include <linux/interval_tree_generic.h>
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#include <linux/module.h>
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#define START(node) ((node)->start)
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#define LAST(node) ((node)->last)
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INTERVAL_TREE_DEFINE(struct interval_tree_node, rb,
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unsigned long, __subtree_last,
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START, LAST,, interval_tree)
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EXPORT_SYMBOL_GPL(interval_tree_insert);
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EXPORT_SYMBOL_GPL(interval_tree_remove);
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EXPORT_SYMBOL_GPL(interval_tree_iter_first);
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EXPORT_SYMBOL_GPL(interval_tree_iter_next);
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