Messages in this thread Patch in this message | | | From | Yury Norov <> | Subject | [PATCH 14/22] x86: smp: use cpumask_weight_eq() in remove_siblinginfo | Date | Tue, 10 May 2022 08:47:42 -0700 |
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cpumask_weight_eq() is more efficient because it may stop traversing cpumask depending on condition.
CC: Balbir Singh <sblbir@amazon.com> CC: Boris Ostrovsky <boris.ostrovsky@oracle.com> CC: Borislav Petkov <bp@alien8.de> CC: Dave Hansen <dave.hansen@linux.intel.com> CC: H. Peter Anvin <hpa@zytor.com> CC: Huang Rui <ray.huang@amd.com> CC: Ingo Molnar <mingo@redhat.com> CC: Paul E. McKenney <paulmck@kernel.org> CC: Peter Zijlstra <peterz@infradead.org> CC: Rafael J. Wysocki <rafael.j.wysocki@intel.com> CC: Sean Christopherson <seanjc@google.com> CC: Thomas Gleixner <tglx@linutronix.de> CC: Tim Chen <tim.c.chen@linux.intel.com> CC: x86@kernel.org CC: linux-kernel@vger.kernel.org Signed-off-by: Yury Norov <yury.norov@gmail.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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