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OpenCloudOS-Kernel
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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: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Andi Kleen 2013-10-23 10:57:58 +10:30 committed by Rusty Russell
parent eb3057df73
commit e0f244c63f
2 changed files with 3 additions and 3 deletions
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4
include/linux/export.h
View File

@ -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 }

2
scripts/mod/modpost.c
View File

@ -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)