Commit 3967a956 authored by Zeng Heng's avatar Zeng Heng
Browse files

arm64/mpam: Remove warning about no msc corresponding to the online cpu 

hulk inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I96YK9


CVE: NA

-----------------------------

It's fine that the associated msc is not found when the CPU comes online.
For example, the device platform does not support L3 cache and there is
no any L3 cache msc indeed.

Signed-off-by: default avatarZeng Heng <zengheng4@huawei.com>
parent 2ad5d68f

arch/arm64/kernel/mpam/mpam_setup.c

+7 −4
Original line number Diff line number Diff line
@@ -78,9 +78,11 @@ static int mpam_resctrl_setup_domain(unsigned int cpu, 
		}

	}



	/* cpu with unknown exported component? */

	if (WARN_ON_ONCE(!comp))

	if (!comp) {

		pr_info_once("There is no msc corresponding to CPU%d.\n", cpu);

		return 0;

	}





	dom = kzalloc_node(sizeof(*dom), GFP_KERNEL, cpu_to_node(cpu));

	if (!dom)
@@ -168,9 +170,10 @@ int mpam_resctrl_cpu_offline(unsigned int cpu) 
	for_each_supported_resctrl_exports(res) {

		 d = resctrl_get_domain_from_cpu(cpu, &res->resctrl_res);



		/* cpu with unknown exported component? */

		if (WARN_ON_ONCE(!d))

		if (!d) {

			pr_info_once("There is no msc corresponding to CPU%d.\n", cpu);

			continue;

		}



		cpumask_clear_cpu(cpu, &d->cpu_mask);