linux-kernel - [RFC PATCH 1/7] x86/intel_rdt: Expose useful functions to all RDT code

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Date:   Tue, 24 Jul 2018 13:40:12 -0700
From:   Reinette Chatre <reinette.chatre@...el.com>
To:     tglx@...utronix.de, fenghua.yu@...el.com, tony.luck@...el.com,
        vikas.shivappa@...ux.intel.com
Cc:     gavin.hindman@...el.com, jithu.joseph@...el.com,
        dave.hansen@...el.com, mingo@...hat.com, hpa@...or.com,
        x86@...nel.org, linux-kernel@...r.kernel.org,
        Reinette Chatre <reinette.chatre@...el.com>
Subject: [RFC PATCH 1/7] x86/intel_rdt: Expose useful functions to all RDT code

In preparation for support of restoring pseudo-locked regions two
functions are exposed to all RDT code: closid_alloc() and
closid_allocated().

Signed-off-by: Reinette Chatre <reinette.chatre@...el.com>
---
 arch/x86/kernel/cpu/intel_rdt.h          | 2 ++
 arch/x86/kernel/cpu/intel_rdt_rdtgroup.c | 4 ++--
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/cpu/intel_rdt.h b/arch/x86/kernel/cpu/intel_rdt.h
index 4e588f36228f..7afbf1a746b7 100644
--- a/arch/x86/kernel/cpu/intel_rdt.h
+++ b/arch/x86/kernel/cpu/intel_rdt.h
@@ -536,6 +536,8 @@ int rdtgroup_pseudo_lock_create(struct rdtgroup *rdtgrp);
 void rdtgroup_pseudo_lock_remove(struct rdtgroup *rdtgrp);
 struct rdt_domain *get_domain_from_cpu(int cpu, struct rdt_resource *r);
 int update_domains(struct rdt_resource *r, int closid);
+bool closid_allocated(unsigned int closid);
+int closid_alloc(void);
 void closid_free(int closid);
 int alloc_rmid(void);
 void free_rmid(u32 rmid);
diff --git a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
index d6d7ea7349d0..73f7ff26e704 100644
--- a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
+++ b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
@@ -113,7 +113,7 @@ static void closid_init(void)
 	closid_free_map &= ~1;
 }
 
-static int closid_alloc(void)
+int closid_alloc(void)
 {
 	u32 closid = ffs(closid_free_map);
 
@@ -137,7 +137,7 @@ void closid_free(int closid)
  * Return: true if @closid is currently associated with a resource group,
  * false if @closid is free
  */
-static bool closid_allocated(unsigned int closid)
+bool closid_allocated(unsigned int closid)
 {
 	return (closid_free_map & (1 << closid)) == 0;
 }
-- 
2.17.0