linux-kernel - [PATCH v4 0/3] bitmap: introduce find_random

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Message-ID: <20250619182626.393541-1-yury.norov@gmail.com>
Date: Thu, 19 Jun 2025 14:26:22 -0400
From: Yury Norov <yury.norov@...il.com>
To: linux-kernel@...r.kernel.org,
	"Yury Norov [NVIDIA]" <yury.norov@...il.com>,
	Rasmus Villemoes <linux@...musvillemoes.dk>,
	John Stultz <jstultz@...gle.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Stephen Boyd <sboyd@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH v4 0/3] bitmap: introduce find_random_bit() and use in clocksource

nodemasks implement node_random(), which may also be useful for other
subsystems. Generalize the function, and propagate to cpumask API.

v1: https://lore.kernel.org/all/20250604212125.25656-1-yury.norov@gmail.com/
v2: https://lore.kernel.org/all/20250608194536.28130-1-yury.norov@gmail.com/
v3: https://lore.kernel.org/all/20250617200854.60753-1-yury.norov@gmail.com/
v4: return NUMA_NO_NODES instead of MAX_NUMNODES in node_random() (Andrew)

Yury Norov [NVIDIA] (3):
  bitmap: generalize node_random()
  cpumask: introduce cpumask_random()
  clocksource: Improve randomness in clocksource_verify_choose_cpus()

 include/linux/cpumask.h   | 12 ++++++++++++
 include/linux/find.h      |  2 ++
 include/linux/nodemask.h  | 18 +++---------------
 kernel/time/clocksource.c |  5 +----
 lib/find_bit.c            | 24 ++++++++++++++++++++++++
 5 files changed, 42 insertions(+), 19 deletions(-)

-- 
2.43.0