module: Sort exported symbols

This patch places every exported symbol in its own section
(i.e. "___ksymtab+printk").  Thus the linker will use its SORT() directive
to sort and finally merge all symbol in the right and final section
(i.e. "__ksymtab").

The symbol prefixed archs use an underscore as prefix for symbols.
To avoid collision we use a different character to create the temporary
section names.

This work was supported by a hardware donation from the CE Linux Forum.

Signed-off-by: Alessio Igor Bogani <abogani@kernel.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (folded in '+' fixup)
Tested-by: Dirk Behme <dirk.behme@googlemail.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/include/linux/module.h b/include/linux/module.h
index 49f4ad0ddec2..d9ca2d5dc6d0 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -224,7 +224,7 @@ struct module_use {
         extern void *__crc_##sym __attribute__((weak));         \
         static const unsigned long __kcrctab_##sym              \
         __used                                                  \
-        __attribute__((section("__kcrctab" sec), unused))       \
+        __attribute__((section("___kcrctab" sec "+" #sym), unused))     \
         = (unsigned long) &__crc_##sym;
 #else
 #define __CRC_SYMBOL(sym, sec)
@@ -239,7 +239,7 @@ struct module_use {
         = MODULE_SYMBOL_PREFIX #sym;                            \
         static const struct kernel_symbol __ksymtab_##sym       \
         __used                                                  \
-        __attribute__((section("__ksymtab" sec), unused))       \
+        __attribute__((section("___ksymtab" sec "+" #sym), unused))     \
         = { (unsigned long)&sym, __kstrtab_##sym }
 
 #define EXPORT_SYMBOL(sym)                                      \