lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Wed, 2 Dec 2009 19:12:40 -0800 From: Dmitry Torokhov <dmitry.torokhov@...il.com> To: LKML <linux-kernel@...r.kernel.org> Cc: Tejun Heo <htejun@...il.com>, Jeff Garzik <jgarzik@...hat.com>, Jean Delvare <khali@...ux-fr.org>, "Rafael J. Wysocki" <rjw@...k.pl>, "H. Peter Anvin" <hpa@...or.com> Subject: [PATCH] DMI: allow omitting ident strings in DMI tables 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 consider entries with empty ident but initialized first match slot as a valid entry and not as end-of-table marker. Signed-off-by: Dmitry Torokhov <dtor@...l.ru> --- CCed a few random people since they touched dmi code in the last few months... drivers/firmware/dmi_scan.c | 13 +++++++++++-- 1 files changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c index 938100f..9116aa7 100644 --- a/drivers/firmware/dmi_scan.c +++ b/drivers/firmware/dmi_scan.c @@ -440,6 +440,15 @@ static bool dmi_matches(const struct dmi_system_id *dmi) } /** + * dmi_is_end_of_table - check for end-of-table marker + * @dmi: pointer to the dmi_system_id structure to check + */ +static bool dmi_is_end_of_table(const struct dmi_system_id *dmi) +{ + return dmi->ident == NULL && dmi->matches[0].slot == DMI_NONE; +} + +/** * dmi_check_system - check system DMI data * @list: array of dmi_system_id structures to match against * All non-null elements of the list must match @@ -457,7 +466,7 @@ int dmi_check_system(const struct dmi_system_id *list) int count = 0; const struct dmi_system_id *d; - for (d = list; d->ident; d++) + for (d = list; !dmi_is_end_of_table(d); d++) if (dmi_matches(d)) { count++; if (d->callback && d->callback(d)) @@ -484,7 +493,7 @@ const struct dmi_system_id *dmi_first_match(const struct dmi_system_id *list) { const struct dmi_system_id *d; - for (d = list; d->ident; d++) + for (d = list; !dmi_is_end_of_table(d); d++) if (dmi_matches(d)) return d; -- Dmitry -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists