linux-kernel - [PATCH 0/4] cpumask: cleanup nr_cpu_ids vs nr_cpumask

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Date:   Mon, 29 Aug 2022 09:57:44 -0700
From:   Yury Norov <yury.norov@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     Yury Norov <yury.norov@...il.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Paul E . McKenney" <paulmck@...nel.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Valentin Schneider <vschneid@...hat.com>,
        Sander Vanheule <sander@...nheule.net>,
        Alexey Klimov <klimov.linux@...il.com>,
        Eric Biggers <ebiggers@...gle.com>
Subject: [PATCH 0/4] cpumask: cleanup nr_cpu_ids vs nr_cpumask_bits mess

cpumask subsystem uses nr_cpu_ids and nr_cpumask_bits interchangeably
despite that the variables have different meaning and purpose. It makes
some cpumask functions broken.

This series cleans that mess and adds new config FORCE_NR_CPUS that
allows to optimize cpumask subsystem if the number of CPUs is known
at compile-time.

Yury Norov (4):
  smp: add set_nr_cpu_ids()
  lib/cpumask: delete misleading comment
  lib/cpumask: deprecate nr_cpumask_bits
  lib/cpumask: add FORCE_NR_CPUS config option

 arch/loongarch/kernel/setup.c |  2 +-
 arch/mips/kernel/setup.c      |  2 +-
 arch/x86/kernel/smpboot.c     |  4 ++--
 arch/x86/xen/smp_pv.c         |  2 +-
 include/linux/cpumask.h       | 15 +++------------
 include/linux/smp.h           |  9 +++++++++
 kernel/smp.c                  |  6 ++++--
 lib/Kconfig                   | 10 ++++++++++
 8 files changed, 31 insertions(+), 19 deletions(-)

-- 
2.34.1