[PATCH V4 26/38] x86/intel_rdt: Split resource group removal in two

[Reinette Chatre]

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.cha...@intel.com>
---
 arch/x86/kernel/cpu/intel_rdt_rdtgroup.c | 25 ++++++++++++++++---------
 1 file changed, 16 insertions(+), 9 deletions(-)

diff --git a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c 
b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
index 31dd9a2cc394..b7509ec336df 100644
--- a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
+++ b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
@@ -2565,6 +2565,21 @@ static int rdtgroup_rmdir_mon(struct kernfs_node *kn, 
struct rdtgroup *rdtgrp,
        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,
                               cpumask_var_t tmpmask)
 {
@@ -2590,7 +2605,6 @@ static int rdtgroup_rmdir_ctrl(struct kernfs_node *kn, 
struct rdtgroup *rdtgrp,
        cpumask_or(tmpmask, tmpmask, &rdtgrp->cpu_mask);
        update_closid_rmid(tmpmask, NULL);
 
-       rdtgrp->flags = RDT_DELETED;
        closid_free(rdtgrp->closid);
        free_rmid(rdtgrp->mon.rmid);
 
@@ -2599,14 +2613,7 @@ static int rdtgroup_rmdir_ctrl(struct kernfs_node *kn, 
struct rdtgroup *rdtgrp,
         */
        free_all_child_rdtgrp(rdtgrp);
 
-       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);
+       rdtgroup_ctrl_remove(kn, rdtgrp);
 
        return 0;
 }
-- 
2.13.6