tools: fix shared radix-tree build

The shared radix-tree build is not correctly recompiling when
lib/maple_tree.c and lib/test_maple_tree.c are modified - fix this by
adding these core components to the SHARED_DEPS list.

Additionally, add missing header guards to shared header files.

Link: https://lkml.kernel.org/r/20240924180724.112169-1-lorenzo.stoakes@oracle.com
Fixes: 74579d8d ("tools: separate out shared radix-tree components")
Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Tested-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: "Liam R. Howlett" <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

tools/testing/shared/maple-shared.h

 /* SPDX-License-Identifier: GPL-2.0+ */
+#ifndef __MAPLE_SHARED_H__
+#define __MAPLE_SHARED_H__
 
 #define CONFIG_DEBUG_MAPLE_TREE
 #define CONFIG_MAPLE_SEARCH
@@ -7,3 +9,5 @@
 #include <stdlib.h>
 #include <time.h>
 #include "linux/init.h"
+
+#endif /* __MAPLE_SHARED_H__ */

tools/testing/shared/shared.h

 /* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __SHARED_H__
+#define __SHARED_H__
 
 #include <linux/types.h>
 #include <linux/bug.h>
@@ -31,3 +33,5 @@
 #ifndef dump_stack
 #define dump_stack()	assert(0)
 #endif
+
+#endif /* __SHARED_H__ */

tools/testing/shared/shared.mk

@@ -15,7 +15,9 @@ SHARED_DEPS = Makefile ../shared/shared.mk ../shared/*.h generated/map-shift.h \
 	../../../include/linux/maple_tree.h \
 	../../../include/linux/radix-tree.h \
 	../../../lib/radix-tree.h \
-	../../../include/linux/idr.h
+	../../../include/linux/idr.h \
+	../../../lib/maple_tree.c \
+	../../../lib/test_maple_tree.c
 
 ifndef SHIFT
 	SHIFT=3

tools/testing/shared/xarray-shared.h

 /* SPDX-License-Identifier: GPL-2.0+ */
+#ifndef __XARRAY_SHARED_H__
+#define __XARRAY_SHARED_H__
 
 #define XA_DEBUG
 #include "shared.h"
+
+#endif /* __XARRAY_SHARED_H__ */