v4.19.13 snapshot.
diff --git a/include/asm-generic/export.h b/include/asm-generic/export.h
new file mode 100644
index 0000000..4d73e6e
--- /dev/null
+++ b/include/asm-generic/export.h
@@ -0,0 +1,93 @@
+#ifndef __ASM_GENERIC_EXPORT_H
+#define __ASM_GENERIC_EXPORT_H
+
+#ifndef KSYM_FUNC
+#define KSYM_FUNC(x) x
+#endif
+#ifdef CONFIG_64BIT
+#ifndef KSYM_ALIGN
+#define KSYM_ALIGN 8
+#endif
+#else
+#ifndef KSYM_ALIGN
+#define KSYM_ALIGN 4
+#endif
+#endif
+#ifndef KCRC_ALIGN
+#define KCRC_ALIGN 4
+#endif
+
+.macro __put, val, name
+#ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
+ .long \val - ., \name - .
+#elif defined(CONFIG_64BIT)
+ .quad \val, \name
+#else
+ .long \val, \name
+#endif
+.endm
+
+/*
+ * note on .section use: @progbits vs %progbits nastiness doesn't matter,
+ * since we immediately emit into those sections anyway.
+ */
+.macro ___EXPORT_SYMBOL name,val,sec
+#ifdef CONFIG_MODULES
+ .globl __ksymtab_\name
+ .section ___ksymtab\sec+\name,"a"
+ .balign KSYM_ALIGN
+__ksymtab_\name:
+ __put \val, __kstrtab_\name
+ .previous
+ .section __ksymtab_strings,"a"
+__kstrtab_\name:
+ .asciz "\name"
+ .previous
+#ifdef CONFIG_MODVERSIONS
+ .section ___kcrctab\sec+\name,"a"
+ .balign KCRC_ALIGN
+__kcrctab_\name:
+#if defined(CONFIG_MODULE_REL_CRCS)
+ .long __crc_\name - .
+#else
+ .long __crc_\name
+#endif
+ .weak __crc_\name
+ .previous
+#endif
+#endif
+.endm
+#undef __put
+
+#if defined(__KSYM_DEPS__)
+
+#define __EXPORT_SYMBOL(sym, val, sec) === __KSYM_##sym ===
+
+#elif defined(CONFIG_TRIM_UNUSED_KSYMS)
+
+#include <linux/kconfig.h>
+#include <generated/autoksyms.h>
+
+#define __EXPORT_SYMBOL(sym, val, sec) \
+ __cond_export_sym(sym, val, sec, __is_defined(__KSYM_##sym))
+#define __cond_export_sym(sym, val, sec, conf) \
+ ___cond_export_sym(sym, val, sec, conf)
+#define ___cond_export_sym(sym, val, sec, enabled) \
+ __cond_export_sym_##enabled(sym, val, sec)
+#define __cond_export_sym_1(sym, val, sec) ___EXPORT_SYMBOL sym, val, sec
+#define __cond_export_sym_0(sym, val, sec) /* nothing */
+
+#else
+#define __EXPORT_SYMBOL(sym, val, sec) ___EXPORT_SYMBOL sym, val, sec
+#endif
+
+#define EXPORT_SYMBOL(name) \
+ __EXPORT_SYMBOL(name, KSYM_FUNC(name),)
+#define EXPORT_SYMBOL_GPL(name) \
+ __EXPORT_SYMBOL(name, KSYM_FUNC(name), _gpl)
+#define EXPORT_DATA_SYMBOL(name) \
+ __EXPORT_SYMBOL(name, name,)
+#define EXPORT_DATA_SYMBOL_GPL(name) \
+ __EXPORT_SYMBOL(name, name,_gpl)
+
+#endif