linux-kernel - [RFC PATCH 0/2] Introduce cpumask_first

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]

Message-ID: <20250613033447.3531709-1-richard120310@gmail.com>
Date: Fri, 13 Jun 2025 11:34:45 +0800
From: I Hsin Cheng <richard120310@...il.com>
To: yury.norov@...il.com
Cc: linux@...musvillemoes.dk,
	jstultz@...gle.com,
	tglx@...utronix.de,
	sboyd@...nel.org,
	linux-kernel@...r.kernel.org,
	eleanor15x@...il.com,
	visitorckw@...il.com,
	jserv@...s.ncku.edu.tw,
	skhan@...uxfoundation.org,
	linux-kernel-mentees@...ts.linux.dev,
	I Hsin Cheng <richard120310@...il.com>
Subject: [RFC PATCH 0/2] Introduce cpumask_first_but() and use cases

This series introduce cpumask_first_but() and make cpumask_any_but()
a wrapper around it, just like other cpumask_any*() helpers, they're
some wrappers around cpumask_first*(), except some special cases.

The patches are scheduled as the following:
1. The implementation of cpumask_first_but() and some
positive results of making cpumask_any_but() a wrapper around
it are attached there, including performance and code size.

2. Use cpumask_first_but() in clocksource

I Hsin Cheng (2):
  cpumask: Introduce cpumask_first_but()
  clocksource: Use cpumask_first_but() in
    clocksource_verify_choose_cpus()

 include/linux/cpumask.h   | 22 ++++++++++++++++------
 kernel/time/clocksource.c |  4 +---
 2 files changed, 17 insertions(+), 9 deletions(-)

-- 
2.43.0