linux-kernel - [PATCH 4.9 61/65] x86/apic: Drop logical_smp_processor

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Date:   Mon, 11 Nov 2019 19:29:01 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dou Liyang <douly.fnst@...fujitsu.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        andy.shevchenko@...il.com, bhe@...hat.com, ebiederm@...ssion.com,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.9 61/65] x86/apic: Drop logical_smp_processor_id() inline

From: Dou Liyang <douly.fnst@...fujitsu.com>

[ Upstream commit 8f1561680f42a5491b371b513f1ab8197f31fd62 ]

The logical_smp_processor_id() inline which is only called in
setup_local_APIC() on x86_32 systems has no real value.

Drop it and directly use GET_APIC_LOGICAL_ID() at the call site and use a
more suitable variable name for readability

Signed-off-by: Dou Liyang <douly.fnst@...fujitsu.com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: andy.shevchenko@...il.com
Cc: bhe@...hat.com
Cc: ebiederm@...ssion.com
Link: https://lkml.kernel.org/r/20180301055930.2396-4-douly.fnst@cn.fujitsu.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/x86/include/asm/smp.h  | 10 ----------
 arch/x86/kernel/apic/apic.c | 10 +++++-----
 2 files changed, 5 insertions(+), 15 deletions(-)

diff --git a/arch/x86/include/asm/smp.h b/arch/x86/include/asm/smp.h
index d25fb6beb2f0c..dcaf7100b69c2 100644
--- a/arch/x86/include/asm/smp.h
+++ b/arch/x86/include/asm/smp.h
@@ -177,16 +177,6 @@ extern int safe_smp_processor_id(void);
 #endif
 
 #ifdef CONFIG_X86_LOCAL_APIC
-
-#ifndef CONFIG_X86_64
-static inline int logical_smp_processor_id(void)
-{
-	/* we don't want to mark this access volatile - bad code generation */
-	return GET_APIC_LOGICAL_ID(apic_read(APIC_LDR));
-}
-
-#endif
-
 extern int hard_smp_processor_id(void);
 
 #else /* CONFIG_X86_LOCAL_APIC */
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 264daf1f49915..ad2a220a4a7f7 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -1342,7 +1342,7 @@ void setup_local_APIC(void)
 	int cpu = smp_processor_id();
 	unsigned int value;
 #ifdef CONFIG_X86_32
-	int i;
+	int logical_apicid, ldr_apicid;
 #endif
 
 
@@ -1389,11 +1389,11 @@ void setup_local_APIC(void)
 	 * initialized during get_smp_config(), make sure it matches the
 	 * actual value.
 	 */
-	i = early_per_cpu(x86_cpu_to_logical_apicid, cpu);
-	WARN_ON(i != BAD_APICID && i != logical_smp_processor_id());
+	logical_apicid = early_per_cpu(x86_cpu_to_logical_apicid, cpu);
+	ldr_apicid = GET_APIC_LOGICAL_ID(apic_read(APIC_LDR));
+	WARN_ON(logical_apicid != BAD_APICID && logical_apicid != ldr_apicid);
 	/* always use the value from LDR */
-	early_per_cpu(x86_cpu_to_logical_apicid, cpu) =
-		logical_smp_processor_id();
+	early_per_cpu(x86_cpu_to_logical_apicid, cpu) = ldr_apicid;
 #endif
 
 	/*
-- 
2.20.1