Make most arch asm/module.h files use asm-generic/module.h

Use the mapping of Elf_[SPE]hdr, Elf_Addr, Elf_Sym, Elf_Dyn, Elf_Rel/Rela,
ELF_R_TYPE() and ELF_R_SYM() to either the 32-bit version or the 64-bit version
into asm-generic/module.h for all arches bar MIPS.

Also, use the generic definition mod_arch_specific where possible.

To this end, I've defined three new config bools:

 (*) HAVE_MOD_ARCH_SPECIFIC

     Arches define this if they don't want to use the empty generic
     mod_arch_specific struct.

 (*) MODULES_USE_ELF_RELA

     Arches define this if their modules can contain RELA records.  This causes
     the Elf_Rela mapping to be emitted and allows apply_relocate_add() to be
     defined by the arch rather than have the core emit an error message.

 (*) MODULES_USE_ELF_REL

     Arches define this if their modules can contain REL records.  This causes
     the Elf_Rel mapping to be emitted and allows apply_relocate() to be
     defined by the arch rather than have the core emit an error message.

Note that it is possible to allow both REL and RELA records: m68k and mips are
two arches that do this.

With this, some arch asm/module.h files can be deleted entirely and replaced
with a generic-y marker in the arch Kbuild file.

Additionally, I have removed the bits from m32r and score that handle the
unsupported type of relocation record as that's now handled centrally.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

2 files changed, 2 insertions, 6 deletions

diff --git a/arch/mn10300/Kconfig b/arch/mn10300/Kconfig
index 5cfb086b3903..aa03f2e13385 100644
--- a/arch/mn10300/Kconfig
+++ b/arch/mn10300/Kconfig
@@ -8,6 +8,7 @@ config MN10300
         select HAVE_ARCH_KGDB
         select HAVE_NMI_WATCHDOG if MN10300_WD_TIMER
         select GENERIC_CLOCKEVENTS
+        select MODULES_USE_ELF_RELA
 
 config AM33_2
         def_bool n
diff --git a/arch/mn10300/include/asm/module.h b/arch/mn10300/include/asm/module.h
index 5d7057d01494..6571103b0518 100644
--- a/arch/mn10300/include/asm/module.h
+++ b/arch/mn10300/include/asm/module.h
@@ -12,12 +12,7 @@
 #ifndef _ASM_MODULE_H
 #define _ASM_MODULE_H
 
-struct mod_arch_specific {
-};
-
-#define Elf_Shdr        Elf32_Shdr
-#define Elf_Sym         Elf32_Sym
-#define Elf_Ehdr        Elf32_Ehdr
+#include <asm-generic/module.h>
 
 /*
  * Include the MN10300 architecture version.