linux-kernel - [PATCH 0/3] rtc,x86: RTC CMOS refactoring

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

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 25 Feb 2022 22:50:08 +0100
From:   Mateusz Jończyk <mat.jonczyk@...pl>
To:     linux-kernel@...r.kernel.org, linux-rtc@...r.kernel.org
Cc:     Mateusz Jończyk <mat.jonczyk@...pl>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>
Subject: [PATCH 0/3] rtc,x86: RTC CMOS refactoring

Hello,

The main aim of this series is to remove duplicated code in
mach_get_cmos_time() in arch/x86/kernel/rtc.c . This function performed
the same thing as mc146818_get_time() - reading the time from the CMOS
RTC - but used a different algorithm. So modify it to use standard
mc146818_get_time().

First, to make these functions more similar to each other (and also for
another reason described in the patch), reduce the polling period in
mc146818_get_time(). Then, rewrite mach_get_cmos_time().

The last patch renames a function in arch/x86/kernel/rtc.c.

I have tested this on three different computers.

Greetings,
Mateusz

Signed-off-by: Mateusz Jończyk <mat.jonczyk@...pl>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Dave Hansen <dave.hansen@...ux.intel.com>
Cc: x86@...nel.org
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: Alessandro Zummo <a.zummo@...ertech.it>
Cc: Alexandre Belloni <alexandre.belloni@...tlin.com>

Mateusz Jończyk (3):
  rtc-mc146818-lib: reduce RTC_UIP polling period
  x86/rtc: rewrite mach_get_cmos_time
  x86/rtc: rename mach_set_rtc_mmss

 arch/x86/include/asm/mc146818rtc.h |  2 +-
 arch/x86/kernel/rtc.c              | 63 +++++-------------------------
 arch/x86/kernel/x86_init.c         |  2 +-
 drivers/rtc/rtc-mc146818-lib.c     |  8 ++--
 4 files changed, 15 insertions(+), 60 deletions(-)

base-commit: cfb92440ee71adcc2105b0890bb01ac3cddb8507
-- 
2.25.1