Re: [PATCH 14/17] kernel/cpu: add num_present_cpu counter

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Subject: Re: [PATCH 14/17] kernel/cpu: add num_present_cpu counter

From: Peter Zijlstra <peterz@xxxxxxxxxxxxx>

Date: Tue, 21 Dec 2021 14:14:46 +0100

Cc: linux-kernel@xxxxxxxxxxxxxxx, "James E.J. Bottomley" <jejb@xxxxxxxxxxxxx>, "Martin K. Petersen" <martin.petersen@xxxxxxxxxx>, Michał Mirosław <mirq-linux@xxxxxxxxxxxx>, "Paul E. McKenney" <paulmck@xxxxxxxxxx>, "Rafael J. Wysocki" <rafael@xxxxxxxxxx>, Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>, Alexey Klimov <aklimov@xxxxxxxxxx>, Amitkumar Karwar <amitkarwar@xxxxxxxxx>, Andi Kleen <ak@xxxxxxxxxxxxxxx>, Andrew Lunn <andrew@xxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Andy Gross <agross@xxxxxxxxxx>, Andy Lutomirski <luto@xxxxxxxxxx>, Andy Shevchenko <andy@xxxxxxxxxxxxx>, Anup Patel <anup.patel@xxxxxxx>, Ard Biesheuvel <ardb@xxxxxxxxxx>, Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>, Arnd Bergmann <arnd@xxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, Catalin Marinas <catalin.marinas@xxxxxxx>, Christoph Hellwig <hch@xxxxxx>, Christoph Lameter <cl@xxxxxxxxx>, Daniel Vetter <daniel@xxxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>, David Airlie <airlied@xxxxxxxx>, David Laight <David.Laight@xxxxxxxxxx>, Dennis Zhou <dennis@xxxxxxxxxx>, Emil Renner Berthing <kernel@xxxxxxxx>, Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>, Geetha sowjanya <gakula@xxxxxxxxxxx>, Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>, Guo Ren <guoren@xxxxxxxxxx>, Hans de Goede <hdegoede@xxxxxxxxxx>, Heiko Carstens <hca@xxxxxxxxxxxxx>, Ian Rogers <irogers@xxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Jakub Kicinski <kuba@xxxxxxxxxx>, Jason Wessel <jason.wessel@xxxxxxxxxxxxx>, Jens Axboe <axboe@xxxxxx>, Jiri Olsa <jolsa@xxxxxxxxxx>, Joe Perches <joe@xxxxxxxxxxx>, Jonathan Cameron <jic23@xxxxxxxxxx>, Juri Lelli <juri.lelli@xxxxxxxxxx>, Kees Cook <keescook@xxxxxxxxxxxx>, Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxxxxx>, Lee Jones <lee.jones@xxxxxxxxxx>, Marc Zyngier <maz@xxxxxxxxxx>, Marcin Wojtas <mw@xxxxxxxxxxxx>, Mark Gross <markgross@xxxxxxxxxx>, Mark Rutland <mark.rutland@xxxxxxx>, Matti Vaittinen <mazziesaccount@xxxxxxxxx>, Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>, Mel Gorman <mgorman@xxxxxxx>, Michael Ellerman <mpe@xxxxxxxxxxxxxx>, Mike Marciniszyn <mike.marciniszyn@xxxxxxxxxxxxxxxxxxxx>, Nicholas Piggin <npiggin@xxxxxxxxx>, Palmer Dabbelt <palmer@xxxxxxxxxxx>, Petr Mladek <pmladek@xxxxxxxx>, Randy Dunlap <rdunlap@xxxxxxxxxxxxx>, Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>, Russell King <linux@xxxxxxxxxxxxxxx>, Saeed Mahameed <saeedm@xxxxxxxxxx>, Sagi Grimberg <sagi@xxxxxxxxxxx>, Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>, Solomon Peachy <pizza@xxxxxxxxxxxx>, Stephen Boyd <sboyd@xxxxxxxxxx>, Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>, Steven Rostedt <rostedt@xxxxxxxxxxx>, Subbaraya Sundeep <sbhatta@xxxxxxxxxxx>, Sudeep Holla <sudeep.holla@xxxxxxx>, Sunil Goutham <sgoutham@xxxxxxxxxxx>, Tariq Toukan <tariqt@xxxxxxxxxx>, Tejun Heo <tj@xxxxxxxxxx>, Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ulf Hansson <ulf.hansson@xxxxxxxxxx>, Vincent Guittot <vincent.guittot@xxxxxxxxxx>, Vineet Gupta <vgupta@xxxxxxxxxx>, Viresh Kumar <viresh.kumar@xxxxxxxxxx>, Vivien Didelot <vivien.didelot@xxxxxxxxx>, Vlastimil Babka <vbabka@xxxxxxx>, Will Deacon <will@xxxxxxxxxx>, bcm-kernel-feedback-list@xxxxxxxxxxxx, kvm@xxxxxxxxxxxxxxx, linux-alpha@xxxxxxxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linux-crypto@xxxxxxxxxxxxxxx, linux-csky@xxxxxxxxxxxxxxx, linux-ia64@xxxxxxxxxxxxxxx, linux-mips@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-perf-users@xxxxxxxxxxxxxxx, linux-riscv@xxxxxxxxxxxxxxxxxxx, linux-s390@xxxxxxxxxxxxxxx, linux-snps-arc@xxxxxxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx

In-reply-to: <20211218212014.1315894-15-yury.norov@gmail.com>

References: <20211218212014.1315894-1-yury.norov@gmail.com> <20211218212014.1315894-15-yury.norov@gmail.com>

On Sat, Dec 18, 2021 at 01:20:10PM -0800, Yury Norov wrote:
> +EXPORT_SYMBOL(set_cpu_present);

NAK