kbuild: fix modpost compile with older gcc

The kernel now requires that CC be 3.1.0 or higher.  But we shouldn't place
that requirement upon HOSTCC unless we really need to.  Fixes my ia64 problem.
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

scripts/mod/modpost.c

@@ -590,14 +590,14 @@ static void check_sec_ref(struct module *mod, const char *modname,
 		
 	/* Walk through all sections */
 	for (i = 0; i < hdr->e_shnum; i++) {
+		Elf_Rela *rela;
+		Elf_Rela *start = (void *)hdr + sechdrs[i].sh_offset;
+		Elf_Rela *stop  = (void*)start + sechdrs[i].sh_size;
 		const char *name = secstrings + sechdrs[i].sh_name +
 						strlen(".rela");
 		/* We want to process only relocation sections and not .init */
 		if (section_ref_ok(name) || (sechdrs[i].sh_type != SHT_RELA))
 			continue;
-		Elf_Rela *rela;
-		Elf_Rela *start = (void *)hdr + sechdrs[i].sh_offset;
-		Elf_Rela *stop  = (void*)start + sechdrs[i].sh_size;
 
 		for (rela = start; rela < stop; rela++) {
 			Elf_Rela r;