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authorChris Wilson <chris@chris-wilson.co.uk>2014-03-17 12:21:54 +0000
committerDaniel Vetter <daniel.vetter@ffwll.ch>2014-05-05 09:09:14 +0200
commita88cc108f6f39e56577793f66ac69eb0e18ae099 (patch)
treeea07f899e8d482e15654d06d7df9aae857166dda /lib/Kconfig
parent8d4eee9cd7a170342dc6fbc2ee19ae77031a8cd5 (diff)
downloadop-kernel-dev-a88cc108f6f39e56577793f66ac69eb0e18ae099.zip
op-kernel-dev-a88cc108f6f39e56577793f66ac69eb0e18ae099.tar.gz
lib: Export interval_tree
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>
Diffstat (limited to 'lib/Kconfig')
-rw-r--r--lib/Kconfig14
1 files changed, 14 insertions, 0 deletions
diff --git a/lib/Kconfig b/lib/Kconfig
index 4771fb3..334f772 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -331,6 +331,20 @@ config TEXTSEARCH_FSM
config BTREE
boolean
+config INTERVAL_TREE
+ boolean
+ help
+ Simple, embeddable, interval-tree. Can find the start of an
+ overlapping range in log(n) time and then iterate over all
+ overlapping nodes. The algorithm is implemented as an
+ augmented rbtree.
+
+ See:
+
+ Documentation/rbtree.txt
+
+ for more information.
+
config ASSOCIATIVE_ARRAY
bool
help
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