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, 5 insertions, 15 deletions

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 107610e01a29..c76a052f60e2 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -125,6 +125,8 @@ config S390
         select GENERIC_CLOCKEVENTS
         select KTIME_SCALAR if 32BIT
         select HAVE_ARCH_SECCOMP_FILTER
+        select HAVE_MOD_ARCH_SPECIFIC
+        select MODULES_USE_ELF_RELA
 
 config SCHED_OMIT_FRAME_POINTER
         def_bool y
diff --git a/arch/s390/include/asm/module.h b/arch/s390/include/asm/module.h
index f0b6b26b6e59..df1f861a848a 100644
--- a/arch/s390/include/asm/module.h
+++ b/arch/s390/include/asm/module.h
@@ -1,5 +1,8 @@
 #ifndef _ASM_S390_MODULE_H
 #define _ASM_S390_MODULE_H
+
+#include <asm-generic/module.h>
+
 /*
  * This file contains the s390 architecture specific module code.
  */
@@ -28,19 +31,4 @@ struct mod_arch_specific
         struct mod_arch_syminfo *syminfo;
 };
 
-#ifdef CONFIG_64BIT
-#define ElfW(x) Elf64_ ## x
-#define ELFW(x) ELF64_ ## x
-#else
-#define ElfW(x) Elf32_ ## x
-#define ELFW(x) ELF32_ ## x
-#endif
-
-#define Elf_Addr ElfW(Addr)
-#define Elf_Rela ElfW(Rela)
-#define Elf_Shdr ElfW(Shdr)
-#define Elf_Sym ElfW(Sym)
-#define Elf_Ehdr ElfW(Ehdr)
-#define ELF_R_SYM ELFW(R_SYM)
-#define ELF_R_TYPE ELFW(R_TYPE)
 #endif /* _ASM_S390_MODULE_H */