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Commit e0f244c6 authored by Andi Kleen's avatar Andi Kleen Committed by Rusty Russell
Browse files

asmlinkage, module: Make ksymtab and kcrctab symbols and __this_module __visible 



Make the ksymtab symbols for EXPORT_SYMBOL visible.
This prevents the LTO compiler from adding a .NUMBER prefix,
which avoids various problems in later export processing.

Cc: rusty@rustcorp.com.au
Signed-off-by: default avatarAndi Kleen <ak@linux.intel.com>
Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
parent eb3057df

include/linux/export.h

+2 −2
Original line number Diff line number Diff line
@@ -43,7 +43,7 @@ extern struct module __this_module; 
/* Mark the CRC weak since genksyms apparently decides not to

 * generate a checksums for some symbols */

#define __CRC_SYMBOL(sym, sec)					\

	extern void *__crc_##sym __attribute__((weak));		\

	extern __visible void *__crc_##sym __attribute__((weak));		\

	static const unsigned long __kcrctab_##sym		\

	__used							\

	__attribute__((section("___kcrctab" sec "+" #sym), unused))	\
@@ -59,7 +59,7 @@ extern struct module __this_module; 
	static const char __kstrtab_##sym[]			\

	__attribute__((section("__ksymtab_strings"), aligned(1))) \

	= VMLINUX_SYMBOL_STR(sym);				\

	static const struct kernel_symbol __ksymtab_##sym	\

	__visible const struct kernel_symbol __ksymtab_##sym	\

	__used							\

	__attribute__((section("___ksymtab" sec "+" #sym), unused))	\

	= { (unsigned long)&sym, __kstrtab_##sym }

scripts/mod/modpost.c

+1 −1
Original line number Diff line number Diff line
@@ -1861,7 +1861,7 @@ static void add_header(struct buffer *b, struct module *mod) 
	buf_printf(b, "\n");

	buf_printf(b, "MODULE_INFO(vermagic, VERMAGIC_STRING);\n");

	buf_printf(b, "\n");

	buf_printf(b, "struct module __this_module\n");

	buf_printf(b, "__visible struct module __this_module\n");

	buf_printf(b, "__attribute__((section(\".gnu.linkonce.this_module\"))) = {\n");

	buf_printf(b, "\t.name = KBUILD_MODNAME,\n");

	if (mod->has_init)