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export.h: remove code for prefixing symbols with underscore

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CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX was selected by BLACKFIN, METAG.
They were removed by commit 4ba66a9760 ("arch: remove blackfin port"),
commit bb6fb6dfcc ("metag: Remove arch/metag/"), respectively.

No more architecture enables CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX.
Clean up the export.h headers.  I am keeping VMLINUX_SYMBOL() and
VMLINUX_SYMBOL_STR() because they are widely used.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
This commit is contained in:
Masahiro Yamada 2018-05-09 16:23:49 +09:00
parent 5a144a1acd
commit 94e58e0ac3
2 changed files with 17 additions and 33 deletions
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34
include/asm-generic/export.h
View File

@ -19,42 +19,32 @@
#define KCRC_ALIGN 4
#endif
#ifdef CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX
#define KSYM(name) _##name
#else
#define KSYM(name) name
#endif
/*
* 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 KSYM(__ksymtab_\name)
.globl __ksymtab_\name
.section ___ksymtab\sec+\name,"a"
.balign KSYM_ALIGN
KSYM(__ksymtab_\name):
__put \val, KSYM(__kstrtab_\name)
__ksymtab_\name:
__put \val, __kstrtab_\name
.previous
.section __ksymtab_strings,"a"
KSYM(__kstrtab_\name):
#ifdef CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX
.asciz "_\name"
#else
__kstrtab_\name:
.asciz "\name"
#endif
.previous
#ifdef CONFIG_MODVERSIONS
.section ___kcrctab\sec+\name,"a"
.balign KCRC_ALIGN
KSYM(__kcrctab_\name):
__kcrctab_\name:
#if defined(CONFIG_MODULE_REL_CRCS)
.long KSYM(__crc_\name) - .
.long __crc_\name - .
#else
.long KSYM(__crc_\name)
.long __crc_\name
#endif
.weak KSYM(__crc_\name)
.weak __crc_\name
.previous
#endif
#endif
@ -84,12 +74,12 @@ KSYM(__kcrctab_\name):
#endif
#define EXPORT_SYMBOL(name) \
__EXPORT_SYMBOL(name, KSYM_FUNC(KSYM(name)),)
__EXPORT_SYMBOL(name, KSYM_FUNC(name),)
#define EXPORT_SYMBOL_GPL(name) \
__EXPORT_SYMBOL(name, KSYM_FUNC(KSYM(name)), _gpl)
__EXPORT_SYMBOL(name, KSYM_FUNC(name), _gpl)
#define EXPORT_DATA_SYMBOL(name) \
__EXPORT_SYMBOL(name, KSYM(name),)
__EXPORT_SYMBOL(name, name,)
#define EXPORT_DATA_SYMBOL_GPL(name) \
__EXPORT_SYMBOL(name, KSYM(name),_gpl)
__EXPORT_SYMBOL(name, name,_gpl)
#endif

16
include/linux/export.h
View File

@ -10,14 +10,8 @@
* hackers place grumpy comments in header files.
*/
/* Some toolchains use a `_' prefix for all user symbols. */
#ifdef CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX
#define __VMLINUX_SYMBOL(x) _##x
#define __VMLINUX_SYMBOL_STR(x) "_" #x
#else
#define __VMLINUX_SYMBOL(x) x
#define __VMLINUX_SYMBOL_STR(x) #x
#endif
/* Indirect, so macros are expanded before pasting. */
#define VMLINUX_SYMBOL(x) __VMLINUX_SYMBOL(x)
@ -46,14 +40,14 @@ extern struct module __this_module;
#if defined(CONFIG_MODULE_REL_CRCS)
#define __CRC_SYMBOL(sym, sec) \
asm(" .section \"___kcrctab" sec "+" #sym "\", \"a\" \n" \
" .weak " VMLINUX_SYMBOL_STR(__crc_##sym) " \n" \
" .long " VMLINUX_SYMBOL_STR(__crc_##sym) " - . \n" \
" .weak __crc_" #sym " \n" \
" .long __crc_" #sym " - . \n" \
" .previous \n");
#else
#define __CRC_SYMBOL(sym, sec) \
asm(" .section \"___kcrctab" sec "+" #sym "\", \"a\" \n" \
" .weak " VMLINUX_SYMBOL_STR(__crc_##sym) " \n" \
" .long " VMLINUX_SYMBOL_STR(__crc_##sym) " \n" \
" .weak __crc_" #sym " \n" \
" .long __crc_" #sym " \n" \
" .previous \n");
#endif
#else
@ -66,7 +60,7 @@ extern struct module __this_module;
__CRC_SYMBOL(sym, sec) \
static const char __kstrtab_##sym[] \
__attribute__((section("__ksymtab_strings"), aligned(1))) \
= VMLINUX_SYMBOL_STR(sym); \
= #sym; \
static const struct kernel_symbol __ksymtab_##sym \
__used \
__attribute__((section("___ksymtab" sec "+" #sym), used)) \