modpost: mismatch_handler: retrieve tosym information only when needed.

Signed-off-by: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

scripts/mod/modpost.c

@@ -1432,16 +1432,17 @@ static void default_mismatch_handler(const char *modname, struct elf_info *elf,
 	const char *tosym;
 	const char *fromsym;
 
-	tosec = sec_name(elf, get_secindex(elf, sym));
 	from = find_elf_symbol2(elf, r->r_offset, fromsec);
 	fromsym = sym_name(elf, from);
-	to = find_elf_symbol(elf, r->r_addend, sym);
-	tosym = sym_name(elf, to);
 
 	if (!strncmp(fromsym, "reference___initcall",
 		     sizeof("reference___initcall")-1))
 		return;
 
+	tosec = sec_name(elf, get_secindex(elf, sym));
+	to = find_elf_symbol(elf, r->r_addend, sym);
+	tosym = sym_name(elf, to);
+
 	/* check whitelist - we may ignore it */
 	if (secref_whitelist(mismatch,
 			     fromsec, fromsym, tosec, tosym)) {