mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-21 01:51:18 +00:00
5b20755b77
Commit f50169324d ("module.h: split out the EXPORT_SYMBOL into
export.h") appropriately separated EXPORT_SYMBOL into <linux/export.h>
because modules and EXPORT_SYMBOL are orthogonal; modules are symbol
consumers, while EXPORT_SYMBOL are used by symbol providers, which
may not be necessarily a module.
However, that commit also relocated THIS_MODULE. As explained in the
commit description, the intention was to define THIS_MODULE in a
lightweight header, but I do not believe <linux/export.h> was the
best location because EXPORT_SYMBOL and THIS_MODULE are unrelated.
Move it to another lightweight header, <linux/init.h>. The reason for
choosing <linux/init.h> is to make <linux/moduleparam.h> self-contained
without relying on <linux/linkage.h> incorrectly including
<linux/export.h>.
With this adjustment, the role of <linux/export.h> becomes clearer as
it only defines EXPORT_SYMBOL.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>
73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
#ifndef _LINUX_EXPORT_H
|
|
#define _LINUX_EXPORT_H
|
|
|
|
#include <linux/compiler.h>
|
|
#include <linux/linkage.h>
|
|
#include <linux/stringify.h>
|
|
|
|
/*
|
|
* This comment block is used by fixdep. Please do not remove.
|
|
*
|
|
* When CONFIG_MODVERSIONS is changed from n to y, all source files having
|
|
* EXPORT_SYMBOL variants must be re-compiled because genksyms is run as a
|
|
* side effect of the *.o build rule.
|
|
*/
|
|
|
|
#ifdef CONFIG_64BIT
|
|
#define __EXPORT_SYMBOL_REF(sym) \
|
|
.balign 8 ASM_NL \
|
|
.quad sym
|
|
#else
|
|
#define __EXPORT_SYMBOL_REF(sym) \
|
|
.balign 4 ASM_NL \
|
|
.long sym
|
|
#endif
|
|
|
|
#define ___EXPORT_SYMBOL(sym, license, ns) \
|
|
.section ".export_symbol","a" ASM_NL \
|
|
__export_symbol_##sym: ASM_NL \
|
|
.asciz license ASM_NL \
|
|
.asciz ns ASM_NL \
|
|
__EXPORT_SYMBOL_REF(sym) ASM_NL \
|
|
.previous
|
|
|
|
#if defined(__DISABLE_EXPORTS)
|
|
|
|
/*
|
|
* Allow symbol exports to be disabled completely so that C code may
|
|
* be reused in other execution contexts such as the UEFI stub or the
|
|
* decompressor.
|
|
*/
|
|
#define __EXPORT_SYMBOL(sym, license, ns)
|
|
|
|
#elif defined(__GENKSYMS__)
|
|
|
|
#define __EXPORT_SYMBOL(sym, license, ns) __GENKSYMS_EXPORT_SYMBOL(sym)
|
|
|
|
#elif defined(__ASSEMBLY__)
|
|
|
|
#define __EXPORT_SYMBOL(sym, license, ns) \
|
|
___EXPORT_SYMBOL(sym, license, ns)
|
|
|
|
#else
|
|
|
|
#define __EXPORT_SYMBOL(sym, license, ns) \
|
|
extern typeof(sym) sym; \
|
|
__ADDRESSABLE(sym) \
|
|
asm(__stringify(___EXPORT_SYMBOL(sym, license, ns)))
|
|
|
|
#endif
|
|
|
|
#ifdef DEFAULT_SYMBOL_NAMESPACE
|
|
#define _EXPORT_SYMBOL(sym, license) __EXPORT_SYMBOL(sym, license, __stringify(DEFAULT_SYMBOL_NAMESPACE))
|
|
#else
|
|
#define _EXPORT_SYMBOL(sym, license) __EXPORT_SYMBOL(sym, license, "")
|
|
#endif
|
|
|
|
#define EXPORT_SYMBOL(sym) _EXPORT_SYMBOL(sym, "")
|
|
#define EXPORT_SYMBOL_GPL(sym) _EXPORT_SYMBOL(sym, "GPL")
|
|
#define EXPORT_SYMBOL_NS(sym, ns) __EXPORT_SYMBOL(sym, "", __stringify(ns))
|
|
#define EXPORT_SYMBOL_NS_GPL(sym, ns) __EXPORT_SYMBOL(sym, "GPL", __stringify(ns))
|
|
|
|
#endif /* _LINUX_EXPORT_H */
|