auto import from //depot/cupcake/@135843
diff --git a/libc/kernel/common/linux/threads.h b/libc/kernel/common/linux/threads.h
new file mode 100644
index 0000000..5d85878
--- /dev/null
+++ b/libc/kernel/common/linux/threads.h
@@ -0,0 +1,23 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ *** This header was automatically generated from a Linux kernel header
+ *** of the same name, to make information necessary for userspace to
+ *** call into the kernel available to libc. It contains only constants,
+ *** structures, and macros generated from the original header, and thus,
+ *** contains no copyrightable information.
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#ifndef _LINUX_THREADS_H
+#define _LINUX_THREADS_H
+
+#define NR_CPUS 1
+
+#define MIN_THREADS_LEFT_FOR_ROOT 4
+
+#define PID_MAX_DEFAULT (CONFIG_BASE_SMALL ? 0x1000 : 0x8000)
+
+#define PID_MAX_LIMIT (CONFIG_BASE_SMALL ? PAGE_SIZE * 8 : (sizeof(long) > 4 ? 4 * 1024 * 1024 : PID_MAX_DEFAULT))
+
+#endif