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Date: Tue, 10 May 2022 08:47:42 -0700 From: Yury Norov <yury.norov@...il.com> To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>, David Laight <David.Laight@...LAB.COM>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Joe Perches <joe@...ches.com>, Julia Lawall <Julia.Lawall@...ia.fr>, Michał Mirosław <mirq-linux@...e.qmqm.pl>, Nicholas Piggin <npiggin@...il.com>, Nicolas Palix <nicolas.palix@...g.fr>, Peter Zijlstra <peterz@...radead.org>, Rasmus Villemoes <linux@...musvillemoes.dk>, Matti Vaittinen <Matti.Vaittinen@...rohmeurope.com>, linux-kernel@...r.kernel.org Cc: Yury Norov <yury.norov@...il.com>, Balbir Singh <sblbir@...zon.com>, Boris Ostrovsky <boris.ostrovsky@...cle.com>, Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>, "H . Peter Anvin" <hpa@...or.com>, Huang Rui <ray.huang@....com>, Ingo Molnar <mingo@...hat.com>, "Paul E . McKenney" <paulmck@...nel.org>, "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>, Sean Christopherson <seanjc@...gle.com>, Thomas Gleixner <tglx@...utronix.de>, Tim Chen <tim.c.chen@...ux.intel.com>, x86@...nel.org Subject: [PATCH 14/22] x86: smp: use cpumask_weight_eq() in remove_siblinginfo cpumask_weight_eq() is more efficient because it may stop traversing cpumask depending on condition. CC: Balbir Singh <sblbir@...zon.com> CC: Boris Ostrovsky <boris.ostrovsky@...cle.com> CC: Borislav Petkov <bp@...en8.de> CC: Dave Hansen <dave.hansen@...ux.intel.com> CC: H. Peter Anvin <hpa@...or.com> CC: Huang Rui <ray.huang@....com> CC: Ingo Molnar <mingo@...hat.com> CC: Paul E. McKenney <paulmck@...nel.org> CC: Peter Zijlstra <peterz@...radead.org> CC: Rafael J. Wysocki <rafael.j.wysocki@...el.com> CC: Sean Christopherson <seanjc@...gle.com> CC: Thomas Gleixner <tglx@...utronix.de> CC: Tim Chen <tim.c.chen@...ux.intel.com> CC: x86@...nel.org CC: linux-kernel@...r.kernel.org Signed-off-by: Yury Norov <yury.norov@...il.com> --- arch/x86/kernel/smpboot.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index 7d948f79ef31..74ca98b3ab2a 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -1621,7 +1621,7 @@ static void remove_siblinginfo(int cpu) for_each_cpu(sibling, topology_sibling_cpumask(cpu)) { cpumask_clear_cpu(cpu, topology_sibling_cpumask(sibling)); - if (cpumask_weight(topology_sibling_cpumask(sibling)) == 1) + if (cpumask_weight_eq(topology_sibling_cpumask(sibling), 1)) cpu_data(sibling).smt_active = false; } -- 2.32.0
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