Merge branch 'x86-irq-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip (888411be) · Commits · 戴 / test

Pull x86 irq update from Ingo Molnar: "A single commit that micro-optimizes an IRQ vectors code path in the CPU offlining code" * 'x86-irq-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/irq: Optimize free vector check in the CPU offline path

arch/x86/kernel/irq.c

+7 −2

Original line number	Diff line number	Diff line
		@@ -394,6 +394,9 @@ int check_irq_vectors_for_cpu_disable(void)
		!cpumask_subset(&affinity_new, &online_new))
		this_count++;
		}
		/* No need to check any further. */
		if (!this_count)
		return 0;

		count = 0;
		for_each_online_cpu(cpu) {
		@@ -411,8 +414,10 @@ int check_irq_vectors_for_cpu_disable(void)
		for (vector = FIRST_EXTERNAL_VECTOR;
		vector < first_system_vector; vector++) {
		if (!test_bit(vector, used_vectors) &&
		IS_ERR_OR_NULL(per_cpu(vector_irq, cpu)[vector]))
		count++;
		IS_ERR_OR_NULL(per_cpu(vector_irq, cpu)[vector])) {
		if (++count == this_count)
		return 0;
		}
		}
		}

Admin message