auto import from //depot/cupcake/@135843
diff --git a/libc/kernel/arch-x86/asm/bitops_32.h b/libc/kernel/arch-x86/asm/bitops_32.h
new file mode 100644
index 0000000..fa77fe2
--- /dev/null
+++ b/libc/kernel/arch-x86/asm/bitops_32.h
@@ -0,0 +1,30 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ *** 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 _I386_BITOPS_H
+#define _I386_BITOPS_H
+
+#ifndef _LINUX_BITOPS_H
+#error only <linux/bitops.h> can be included directly
+#endif
+
+#include <linux/compiler.h>
+#include <asm/alternative.h>
+
+#define ADDR (*(volatile long *) addr)
+
+#define smp_mb__before_clear_bit() barrier()
+#define smp_mb__after_clear_bit() barrier()
+#define test_bit(nr,addr) (__builtin_constant_p(nr) ? constant_test_bit((nr),(addr)) : variable_test_bit((nr),(addr)))
+#undef ADDR
+
+#include <asm-generic/bitops/fls64.h>
+#endif