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The purpose of dmi->ident is twofold - it may be used by DMI callback functions when composing log messages; it is also used to determine end of DMI table in dmi_check_system() and dmi_first_match(). However, in case when callbacks are not interested in using ident at all it just wastes memory. Let's make entries with empty first match slot serve as end-of-table markers instead. Acked-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>