1 files changed, 28 insertions, 0 deletions
diff --git a/kernel/bounds.c b/kernel/bounds.c
new file mode 100644
index 000000000..9795d75b0
--- /dev/null
+++ b/kernel/bounds.c
@@ -0,0 +1,28 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Generate definitions needed by the preprocessor.
+ * This code generates raw asm output which is post-processed
+ * to extract and format the required data.
+ */
+
+#define __GENERATING_BOUNDS_H
+/* Include headers that define the enum constants of interest */
+#include <linux/page-flags.h>
+#include <linux/mmzone.h>
+#include <linux/kbuild.h>
+#include <linux/log2.h>
+#include <linux/spinlock_types.h>
+
+int main(void)
+{
+	/* The enum constants to put into include/generated/bounds.h */
+	DEFINE(NR_PAGEFLAGS, __NR_PAGEFLAGS);
+	DEFINE(MAX_NR_ZONES, __MAX_NR_ZONES);
+#ifdef CONFIG_SMP
+	DEFINE(NR_CPUS_BITS, ilog2(CONFIG_NR_CPUS));
+#endif
+	DEFINE(SPINLOCK_SIZE, sizeof(spinlock_t));
+	/* End of constants */
+
+	return 0;
+}