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barebox / include / linux / export.h
@Masahiro Yamada Masahiro Yamada on 12 May 2020 902 bytes module.h: split out the EXPORT_SYMBOL into export.h
/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef _LINUX_EXPORT_H
#define _LINUX_EXPORT_H

#define THIS_MODULE	0

#ifdef CONFIG_MODULES

struct kernel_symbol
{
	unsigned long value;
	const char *name;
};

/* For every exported symbol, place a struct in the __ksymtab section */
#define __EXPORT_SYMBOL(sym, sec)				\
	extern typeof(sym) sym;					\
	static const char __ustrtab_##sym[]			\
	__attribute__((section("__usymtab_strings")))		\
	= MODULE_SYMBOL_PREFIX #sym;                    	\
	static const struct kernel_symbol __usymtab_##sym	\
	__used \
	__attribute__((section("__usymtab" sec), unused))	\
	= { (unsigned long)&sym, __ustrtab_##sym }

#define EXPORT_SYMBOL(sym)					\
	__EXPORT_SYMBOL(sym, "")

#define EXPORT_SYMBOL_GPL(sym)					\
	__EXPORT_SYMBOL(sym, "")

#else

#define EXPORT_SYMBOL(sym)
#define EXPORT_SYMBOL_GPL(sym)

#endif /* CONFIG_MODULES */

#endif /* _LINUX_EXPORT_H */