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x86/intel_rdt: Split resource group removal in two

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Resource groups used for pseudo-locking do not require the same work on
removal as the other resource groups.

The resource group removal is split in two in preparation for support of
pseudo-locking resource groups. A single re-ordering occurs - the
setting of the rdtgrp flag is moved to later. This flag is not used by
any of the code between its original and new location.

Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: fenghua.yu@intel.com
Cc: tony.luck@intel.com
Cc: vikas.shivappa@linux.intel.com
Cc: gavin.hindman@intel.com
Cc: jithu.joseph@intel.com
Cc: dave.hansen@intel.com
Cc: hpa@zytor.com
Link: https://lkml.kernel.org/r/c8cbf7a7c72480b39bb946a929dbae96c0f9aca1.1529706536.git.reinette.chatre@intel.com
This commit is contained in:
Reinette Chatre 2018-06-22 15:42:18 -07:00 committed by Thomas Gleixner
parent dfe9674b04
commit 17eafd0762
1 changed files with 16 additions and 9 deletions
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25
arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
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@ -2620,6 +2620,21 @@ static int rdtgroup_rmdir_mon(struct kernfs_node *kn, struct rdtgroup *rdtgrp,
return 0; return 0;
} }
static int rdtgroup_ctrl_remove(struct kernfs_node *kn,
struct rdtgroup *rdtgrp)
{
rdtgrp->flags = RDT_DELETED;
list_del(&rdtgrp->rdtgroup_list);
/*
* one extra hold on this, will drop when we kfree(rdtgrp)
* in rdtgroup_kn_unlock()
*/
kernfs_get(kn);
kernfs_remove(rdtgrp->kn);
return 0;
}
static int rdtgroup_rmdir_ctrl(struct kernfs_node *kn, struct rdtgroup *rdtgrp, static int rdtgroup_rmdir_ctrl(struct kernfs_node *kn, struct rdtgroup *rdtgrp,
cpumask_var_t tmpmask) cpumask_var_t tmpmask)
{ {
@ -2645,7 +2660,6 @@ static int rdtgroup_rmdir_ctrl(struct kernfs_node *kn, struct rdtgroup *rdtgrp,
cpumask_or(tmpmask, tmpmask, &rdtgrp->cpu_mask); cpumask_or(tmpmask, tmpmask, &rdtgrp->cpu_mask);
update_closid_rmid(tmpmask, NULL); update_closid_rmid(tmpmask, NULL);
rdtgrp->flags = RDT_DELETED;
closid_free(rdtgrp->closid); closid_free(rdtgrp->closid);
free_rmid(rdtgrp->mon.rmid); free_rmid(rdtgrp->mon.rmid);
@ -2654,14 +2668,7 @@ static int rdtgroup_rmdir_ctrl(struct kernfs_node *kn, struct rdtgroup *rdtgrp,
*/ */
free_all_child_rdtgrp(rdtgrp); free_all_child_rdtgrp(rdtgrp);
list_del(&rdtgrp->rdtgroup_list); rdtgroup_ctrl_remove(kn, rdtgrp);
/*
* one extra hold on this, will drop when we kfree(rdtgrp)
* in rdtgroup_kn_unlock()
*/
kernfs_get(kn);
kernfs_remove(rdtgrp->kn);
return 0; return 0;
} }