diff --git a/include/linux/types.h b/include/linux/types.h
index a3d2182c2686..49b79c8bb1a9 100644
--- a/include/linux/types.h
+++ b/include/linux/types.h
@@ -92,6 +92,7 @@ typedef unsigned char		unchar;
 typedef unsigned short		ushort;
 typedef unsigned int		uint;
 typedef unsigned long		ulong;
+typedef unsigned long long	ullong;
 
 #ifndef __BIT_TYPES_DEFINED__
 #define __BIT_TYPES_DEFINED__
diff --git a/lib/interval_tree_test.c b/lib/interval_tree_test.c
index 12880d772945..51863077d4ec 100644
--- a/lib/interval_tree_test.c
+++ b/lib/interval_tree_test.c
@@ -19,6 +19,7 @@ __param(int, search_loops, 1000, "Number of iterations searching the tree");
 __param(bool, search_all, false, "Searches will iterate all nodes in the tree");
 
 __param(uint, max_endpoint, ~0, "Largest value for the interval's endpoint");
+__param(ullong, seed, 3141592653589793238ULL, "Random seed");
 
 static struct rb_root_cached root = RB_ROOT_CACHED;
 static struct interval_tree_node *nodes = NULL;
@@ -137,7 +138,7 @@ static int interval_tree_test_init(void)
 		return -ENOMEM;
 	}
 
-	prandom_seed_state(&rnd, 3141592653589793238ULL);
+	prandom_seed_state(&rnd, seed);
 
 	basic_check();
 	search_check();
diff --git a/lib/rbtree_test.c b/lib/rbtree_test.c
index b0e0b26506cb..690cede46ac2 100644
--- a/lib/rbtree_test.c
+++ b/lib/rbtree_test.c
@@ -14,6 +14,7 @@
 __param(int, nnodes, 100, "Number of nodes in the rb-tree");
 __param(int, perf_loops, 1000, "Number of iterations modifying the rb-tree");
 __param(int, check_loops, 100, "Number of iterations modifying and verifying the rb-tree");
+__param(ullong, seed, 3141592653589793238ULL, "Random seed");
 
 struct test_node {
 	u32 key;
@@ -402,7 +403,7 @@ static int __init rbtree_test_init(void)
 	if (!nodes)
 		return -ENOMEM;
 
-	prandom_seed_state(&rnd, 3141592653589793238ULL);
+	prandom_seed_state(&rnd, seed);
 
 	basic_check();
 	augmented_check();
diff --git a/tools/include/linux/types.h b/tools/include/linux/types.h
index 8519386acd23..4928e33d44ac 100644
--- a/tools/include/linux/types.h
+++ b/tools/include/linux/types.h
@@ -42,6 +42,8 @@ typedef __s16 s16;
 typedef __u8  u8;
 typedef __s8  s8;
 
+typedef unsigned long long	ullong;
+
 #ifdef __CHECKER__
 #define __bitwise	__attribute__((bitwise))
 #else
diff --git a/tools/testing/rbtree/interval_tree_test.c b/tools/testing/rbtree/interval_tree_test.c
index f1c41f5e28ba..63775b831c1c 100644
--- a/tools/testing/rbtree/interval_tree_test.c
+++ b/tools/testing/rbtree/interval_tree_test.c
@@ -18,6 +18,7 @@ int usage(void)
 	fprintf(stderr, "  -s: Number of iterations searching the tree\n");
 	fprintf(stderr, "  -a: Searches will iterate all nodes in the tree\n");
 	fprintf(stderr, "  -m: Largest value for the interval's endpoint\n");
+	fprintf(stderr, "  -r: Random seed\n");
 	exit(-1);
 }
 
@@ -31,7 +32,7 @@ int main(int argc, char **argv)
 {
 	int opt;
 
-	while ((opt = getopt(argc, argv, "n:p:q:s:am:")) != -1) {
+	while ((opt = getopt(argc, argv, "n:p:q:s:am:r:")) != -1) {
 		if (opt == 'n')
 			nnodes = strtoul(optarg, NULL, 0);
 		else if (opt == 'p')
@@ -44,6 +45,8 @@ int main(int argc, char **argv)
 			search_all = true;
 		else if (opt == 'm')
 			max_endpoint = strtoul(optarg, NULL, 0);
+		else if (opt == 'r')
+			seed = strtoul(optarg, NULL, 0);
 		else
 			usage();
 	}
diff --git a/tools/testing/rbtree/rbtree_test.c b/tools/testing/rbtree/rbtree_test.c
index c723e751b9a9..585c970f679e 100644
--- a/tools/testing/rbtree/rbtree_test.c
+++ b/tools/testing/rbtree/rbtree_test.c
@@ -16,6 +16,7 @@ int usage(void)
 	fprintf(stderr, "  -n: Number of nodes in the rb-tree\n");
 	fprintf(stderr, "  -p: Number of iterations modifying the rb-tree\n");
 	fprintf(stderr, "  -c: Number of iterations modifying and verifying the rb-tree\n");
+	fprintf(stderr, "  -r: Random seed\n");
 	exit(-1);
 }
 
@@ -29,13 +30,15 @@ int main(int argc, char **argv)
 {
 	int opt;
 
-	while ((opt = getopt(argc, argv, "n:p:c:")) != -1) {
+	while ((opt = getopt(argc, argv, "n:p:c:r:")) != -1) {
 		if (opt == 'n')
 			nnodes = strtoul(optarg, NULL, 0);
 		else if (opt == 'p')
 			perf_loops = strtoul(optarg, NULL, 0);
 		else if (opt == 'c')
 			check_loops = strtoul(optarg, NULL, 0);
+		else if (opt == 'r')
+			seed = strtoul(optarg, NULL, 0);
 		else
 			usage();
 	}
