diff --git a/libc/kernel/arch-x86/asm/cache.h b/libc/kernel/arch-x86/asm/cache.h
new file mode 100644
index 0000000..2766a71
--- /dev/null
+++ b/libc/kernel/arch-x86/asm/cache.h
@@ -0,0 +1,20 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   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 _ARCH_X86_CACHE_H
+#define _ARCH_X86_CACHE_H
+
+#define L1_CACHE_SHIFT (CONFIG_X86_L1_CACHE_SHIFT)
+#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)
+
+#define __read_mostly __attribute__((__section__(".data.read_mostly")))
+
+#endif