linux-kernel - [PATCH 2/7] powerpc: Use TIDR CPU feature to control TIDR allocation

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Message-Id: <20180417020950.21446-3-alastair@au1.ibm.com>
Date:   Tue, 17 Apr 2018 12:09:45 +1000
From:   "Alastair D'Silva" <alastair@....ibm.com>
To:     linuxppc-dev@...ts.ozlabs.org
Cc:     linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
        mikey@...ling.org, vaibhav@...ux.vnet.ibm.com,
        aneesh.kumar@...ux.vnet.ibm.com, malat@...ian.org,
        felix@...ux.vnet.ibm.com, pombredanne@...b.com,
        sukadev@...ux.vnet.ibm.com, npiggin@...il.com,
        gregkh@...uxfoundation.org, arnd@...db.de,
        andrew.donnellan@....ibm.com, fbarrat@...ux.vnet.ibm.com,
        corbet@....net, "Alastair D'Silva" <alastair@...ilva.org>
Subject: [PATCH 2/7] powerpc: Use TIDR CPU feature to control TIDR allocation

From: Alastair D'Silva <alastair@...ilva.org>

Switch the use of TIDR on it's CPU feature, rather than assuming it
is available based on architecture.

Signed-off-by: Alastair D'Silva <alastair@...ilva.org>
---
 arch/powerpc/kernel/process.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 1237f13fed51..a3e0a3e06d5a 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -1570,7 +1570,7 @@ void clear_thread_tidr(struct task_struct *t)
 	if (!t->thread.tidr)
 		return;
 
-	if (!cpu_has_feature(CPU_FTR_ARCH_300)) {
+	if (!cpu_has_feature(CPU_FTR_P9_TIDR)) {
 		WARN_ON_ONCE(1);
 		return;
 	}
@@ -1593,7 +1593,7 @@ int set_thread_tidr(struct task_struct *t)
 {
 	int rc;
 
-	if (!cpu_has_feature(CPU_FTR_ARCH_300))
+	if (!cpu_has_feature(CPU_FTR_P9_TIDR))
 		return -EINVAL;
 
 	if (t != current)
-- 
2.14.3