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x86/resctrl: Clean up domain_remove_cpu_ctrl()

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For symmetry with domain_remove_cpu_mon() refactor domain_remove_cpu_ctrl()
to take an early return when removing a CPU does not empty the domain.

Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Link: https://lore.kernel.org/20251217172121.12030-1-tony.luck@intel.com
This commit is contained in:
Tony Luck 2025-12-17 09:20:51 -08:00 committed by Borislav Petkov (AMD)
parent 6396fc5351
commit c1b630573c
1 changed files with 14 additions and 15 deletions
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29
arch/x86/kernel/cpu/resctrl/core.c
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@ -604,28 +604,27 @@ static void domain_remove_cpu_ctrl(int cpu, struct rdt_resource *r)
return;
}
cpumask_clear_cpu(cpu, &hdr->cpu_mask);
if (!cpumask_empty(&hdr->cpu_mask))
return;
if (!domain_header_is_valid(hdr, RESCTRL_CTRL_DOMAIN, r->rid))
return;
d = container_of(hdr, struct rdt_ctrl_domain, hdr);
hw_dom = resctrl_to_arch_ctrl_dom(d);
cpumask_clear_cpu(cpu, &d->hdr.cpu_mask);
if (cpumask_empty(&d->hdr.cpu_mask)) {
resctrl_offline_ctrl_domain(r, d);
list_del_rcu(&d->hdr.list);
synchronize_rcu();
resctrl_offline_ctrl_domain(r, d);
list_del_rcu(&hdr->list);
synchronize_rcu();
/*
* rdt_ctrl_domain "d" is going to be freed below, so clear
* its pointer from pseudo_lock_region struct.
*/
if (d->plr)
d->plr->d = NULL;
ctrl_domain_free(hw_dom);
return;
}
/*
* rdt_ctrl_domain "d" is going to be freed below, so clear
* its pointer from pseudo_lock_region struct.
*/
if (d->plr)
d->plr->d = NULL;
ctrl_domain_free(hw_dom);
}
static void domain_remove_cpu_mon(int cpu, struct rdt_resource *r)