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-rw-r--r--lib/Kconfig14
-rw-r--r--lib/Kconfig.debug1
-rw-r--r--lib/Makefile3
-rw-r--r--lib/interval_tree.c6
-rw-r--r--lib/interval_tree_test.c (renamed from lib/interval_tree_test_main.c)0
5 files changed, 22 insertions, 2 deletions
diff --git a/lib/Kconfig b/lib/Kconfig
index 4771fb3f4da4..334f7722a999 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
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 819ac51202c0..4bff173fef0a 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1496,6 +1496,7 @@ config RBTREE_TEST
config INTERVAL_TREE_TEST
tristate "Interval tree test"
depends on m && DEBUG_KERNEL
+ select INTERVAL_TREE
help
A benchmark measuring the performance of the interval tree library
diff --git a/lib/Makefile b/lib/Makefile
index 0cd7b68e1382..2c6c1a42e1d2 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -50,6 +50,7 @@ CFLAGS_hweight.o = $(subst $(quote),,$(CONFIG_ARCH_HWEIGHT_CFLAGS))
obj-$(CONFIG_GENERIC_HWEIGHT) += hweight.o
obj-$(CONFIG_BTREE) += btree.o
+obj-$(CONFIG_INTERVAL_TREE) += interval_tree.o
obj-$(CONFIG_ASSOCIATIVE_ARRAY) += assoc_array.o
obj-$(CONFIG_DEBUG_PREEMPT) += smp_processor_id.o
obj-$(CONFIG_DEBUG_LIST) += list_debug.o
@@ -156,8 +157,6 @@ lib-$(CONFIG_LIBFDT) += $(libfdt_files)
obj-$(CONFIG_RBTREE_TEST) += rbtree_test.o
obj-$(CONFIG_INTERVAL_TREE_TEST) += interval_tree_test.o
-interval_tree_test-objs := interval_tree_test_main.o interval_tree.o
-
obj-$(CONFIG_PERCPU_TEST) += percpu_test.o
obj-$(CONFIG_ASN1) += asn1_decoder.o
diff --git a/lib/interval_tree.c b/lib/interval_tree.c
index e6eb406f2d65..f367f9ad544c 100644
--- a/lib/interval_tree.c
+++ b/lib/interval_tree.c
@@ -1,6 +1,7 @@
#include <linux/init.h>
#include <linux/interval_tree.h>
#include <linux/interval_tree_generic.h>
+#include <linux/module.h>
#define START(node) ((node)->start)
#define LAST(node) ((node)->last)
@@ -8,3 +9,8 @@
INTERVAL_TREE_DEFINE(struct interval_tree_node, rb,
unsigned long, __subtree_last,
START, LAST,, interval_tree)
+
+EXPORT_SYMBOL_GPL(interval_tree_insert);
+EXPORT_SYMBOL_GPL(interval_tree_remove);
+EXPORT_SYMBOL_GPL(interval_tree_iter_first);
+EXPORT_SYMBOL_GPL(interval_tree_iter_next);
diff --git a/lib/interval_tree_test_main.c b/lib/interval_tree_test.c
index 245900b98c8e..245900b98c8e 100644
--- a/lib/interval_tree_test_main.c
+++ b/lib/interval_tree_test.c