linux-kernel - [tip:x86/apic-cleanups] x86, apic: Remove early_init_lapic

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Message-ID: <tip-f1157141636848f52c5f74040bed0ba355cf59b7@git.kernel.org>
Date:	Thu, 9 Dec 2010 20:55:08 GMT
From:	tip-bot for Yinghai Lu <yinghai@...nel.org>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	yinghai@...nel.org, suresh.b.siddha@...el.com, tglx@...utronix.de,
	ebiederm@...ssion.com
Subject: [tip:x86/apic-cleanups] x86, apic: Remove early_init_lapic_mapping()

Commit-ID:  f1157141636848f52c5f74040bed0ba355cf59b7
Gitweb:     http://git.kernel.org/tip/f1157141636848f52c5f74040bed0ba355cf59b7
Author:     Yinghai Lu <yinghai@...nel.org>
AuthorDate: Tue, 7 Dec 2010 00:55:29 -0800
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Thu, 9 Dec 2010 21:52:04 +0100

x86, apic: Remove early_init_lapic_mapping()

It is almost the same as smp_register_lapic_addr(). We just need to
let smp_read_mpc() call smp_register_lapic_addr() when early==1.

Add the apic_printk to smp_register_lapic_address()

Signed-off-by: Yinghai Lu <yinghai@...nel.org>
Cc: Suresh Siddha <suresh.b.siddha@...el.com>
Cc: "Eric W. Biederman" <ebiederm@...ssion.com>
LKML-Reference: <4CFDF681.3030509@...nel.org>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>

---
 arch/x86/include/asm/apic.h  |    1 -
 arch/x86/kernel/apic/apic.c  |   24 ++----------------------
 arch/x86/kernel/mpparse.c    |    8 ++------
 arch/x86/mm/amdtopology_64.c |    1 -
 4 files changed, 4 insertions(+), 30 deletions(-)

diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h
index 1cc42cf..5e3969c 100644
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -245,7 +245,6 @@ extern int apic_force_enable(void);
  * On 32bit this is mach-xxx local
  */
 #ifdef CONFIG_X86_64
-extern void early_init_lapic_mapping(void);
 extern int apic_is_clustered_box(void);
 #else
 static inline int apic_is_clustered_box(void)
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index c02bf13..f507f31 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -1630,28 +1630,6 @@ no_apic:
 }
 #endif
 
-#ifdef CONFIG_X86_64
-void __init early_init_lapic_mapping(void)
-{
-	/*
-	 * If no local APIC can be found then go out
-	 * : it means there is no mpatable and MADT
-	 */
-	if (!smp_found_config)
-		return;
-
-	set_fixmap_nocache(FIX_APIC_BASE, mp_lapic_addr);
-	apic_printk(APIC_VERBOSE, "mapped APIC to %16lx (%16lx)\n",
-		    APIC_BASE, mp_lapic_addr);
-
-	/*
-	 * Fetch the APIC ID of the BSP in case we have a
-	 * default configuration (or the MP table is broken).
-	 */
-	boot_cpu_physical_apicid = read_apic_id();
-}
-#endif
-
 /**
  * init_apic_mappings - initialize APIC mappings
  */
@@ -1707,6 +1685,8 @@ void __init register_lapic_address(unsigned long address)
 	mp_lapic_addr = address;
 
 	set_fixmap_nocache(FIX_APIC_BASE, address);
+	apic_printk(APIC_VERBOSE, "mapped APIC to %16lx (%16lx)\n",
+		    APIC_BASE, mp_lapic_addr);
 	if (boot_cpu_physical_apicid == -1U) {
 		boot_cpu_physical_apicid  = read_apic_id();
 		apic_version[boot_cpu_physical_apicid] =
diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index db0b703..27ccb70 100644
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -289,17 +289,13 @@ static int __init smp_read_mpc(struct mpc_table *mpc, unsigned early)
 #ifdef CONFIG_X86_32
 	generic_mps_oem_check(mpc, oem, str);
 #endif
-	/* save the local APIC address, it might be non-default */
+	/* Initialize the lapic mapping */
 	if (!acpi_lapic)
-		mp_lapic_addr = mpc->lapic;
+		register_lapic_address(mpc->lapic);
 
 	if (early)
 		return 1;
 
-	/* Initialize the lapic mapping */
-	if (!acpi_lapic)
-		register_lapic_address(mpc->lapic);
-
 	if (mpc->oemptr)
 		x86_init.mpparse.smp_read_mpc_oem(mpc);
 
diff --git a/arch/x86/mm/amdtopology_64.c b/arch/x86/mm/amdtopology_64.c
index 51fae9c..08a0069 100644
--- a/arch/x86/mm/amdtopology_64.c
+++ b/arch/x86/mm/amdtopology_64.c
@@ -66,7 +66,6 @@ static __init void early_get_boot_cpu_id(void)
 	if (smp_found_config)
 		early_get_smp_config();
 #endif
-	early_init_lapic_mapping();
 }
 
 int __init amd_get_nodes(struct bootnode *physnodes)
--
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