Revert "kbuild: fix modpost segfault for 64bit mipsel kernel"

This reverts commit c8d8b837, which
caused problems for the x86 build. Quoth Sam:

  "It was discussed on mips list but apparently the fix was bogus.  I
   will not have time to look into it so mips can carry this local fix
   until we get a proper fix in mainline."
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

scripts/mod/modpost.c

@@ -709,17 +709,10 @@ static void check_sec_ref(struct module *mod, const char *modname,
 		for (rela = start; rela < stop; rela++) {
 			Elf_Rela r;
 			const char *secname;
-			unsigned int r_sym;
 			r.r_offset = TO_NATIVE(rela->r_offset);
-			if (hdr->e_ident[EI_CLASS] == ELFCLASS64 &&
-			    hdr->e_machine == EM_MIPS) {
-				r_sym = ELF64_MIPS_R_SYM(rela->r_info);
-				r_sym = TO_NATIVE(r_sym);
-			} else {
-				r_sym = ELF_R_SYM(TO_NATIVE(rela->r_info));
-			}
+			r.r_info   = TO_NATIVE(rela->r_info);
 			r.r_addend = TO_NATIVE(rela->r_addend);
-			sym = elf->symtab_start + r_sym;
+			sym = elf->symtab_start + ELF_R_SYM(r.r_info);
 			/* Skip special sections */
 			if (sym->st_shndx >= SHN_LORESERVE)
 				continue;

scripts/mod/modpost.h

@@ -39,25 +39,6 @@
 #define ELF_R_TYPE  ELF64_R_TYPE
 #endif
 
-/* The 64-bit MIPS ELF ABI uses an unusual reloc format. */
-typedef struct
-{
-  Elf32_Word    r_sym;		/* Symbol index */
-  unsigned char r_ssym;		/* Special symbol for 2nd relocation */
-  unsigned char r_type3;	/* 3rd relocation type */
-  unsigned char r_type2;	/* 2nd relocation type */
-  unsigned char r_type1;	/* 1st relocation type */
-} _Elf64_Mips_R_Info;
-
-typedef union
-{
-  Elf64_Xword	r_info_number;
-  _Elf64_Mips_R_Info r_info_fields;
-} _Elf64_Mips_R_Info_union;
-
-#define ELF64_MIPS_R_SYM(i) \
-  ((__extension__ (_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_sym)
-
 #if KERNEL_ELFDATA != HOST_ELFDATA
 
 static inline void __endian(const void *src, void *dest, unsigned int size)