u32 offset;
va_list va;
+ elog_lock (em);
va_start (va, fmt);
offset = vec_len (em->string_table);
em->string_table = (char *) va_format ((u8 *) em->string_table, fmt, &va);
/* Null terminate string if it is not already. */
if (vec_end (em->string_table)[-1] != 0)
vec_add1 (em->string_table, 0);
+ elog_unlock (em);
return offset;
}