linux-kernel - [tip:x86/apic] x86/mm/numa: Open code function early_get_boot_cpu

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Date:	Mon, 15 Aug 2016 03:11:03 -0700
From:	tip-bot for Baoquan He <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	brgerst@...il.com, bp@...en8.de, jpoimboe@...hat.com,
	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	dvlasenk@...hat.com, torvalds@...ux-foundation.org, bhe@...hat.com,
	luto@...nel.org, peterz@...radead.org, tglx@...utronix.de
Subject: [tip:x86/apic] x86/mm/numa: Open code function
 early_get_boot_cpu_id()

Commit-ID:  a91bf718dbc993ea582cd53c0cb711a0839b4603
Gitweb:     http://git.kernel.org/tip/a91bf718dbc993ea582cd53c0cb711a0839b4603
Author:     Baoquan He <bhe@...hat.com>
AuthorDate: Fri, 12 Aug 2016 14:57:12 +0800
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Mon, 15 Aug 2016 08:51:54 +0200

x86/mm/numa: Open code function early_get_boot_cpu_id()

Previously early_acpi_boot_init() was called in early_get_boot_cpu_id()
to get the value for boot_cpu_physical_apicid. Now early_acpi_boot_init()
has been taken out and moved to setup_arch(), the name of
early_get_boot_cpu_id() doesn't match its implementation anymore, and
only the getting boot-time SMP configuration code was left.

So in this patch we open code it.

Also move the smp_found_config check into default_get_smp_config to
simplify code, because both early_get_smp_config() and get_smp_config()
call x86_init.mpparse.get_smp_config().

Also remove the redundent CONFIG_X86_MPPARSE #ifdef check when we call
early_get_smp_config().

Signed-off-by: Baoquan He <bhe@...hat.com>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Brian Gerst <brgerst@...il.com>
Cc: Denys Vlasenko <dvlasenk@...hat.com>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Josh Poimboeuf <jpoimboe@...hat.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: linux-acpi@...r.kernel.org
Cc: rjw@...ysocki.net
Link: http://lkml.kernel.org/r/1470985033-22493-1-git-send-email-bhe@redhat.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/kernel/mpparse.c |  3 +++
 arch/x86/kernel/setup.c   |  3 +--
 arch/x86/mm/amdtopology.c | 22 +++++-----------------
 3 files changed, 9 insertions(+), 19 deletions(-)

diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index 068c4a9..0f8d204 100644
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -499,6 +499,9 @@ void __init default_get_smp_config(unsigned int early)
 {
 	struct mpf_intel *mpf = mpf_found;
 
+	if (!smp_found_config)
+		return;
+
 	if (!mpf)
 		return;
 
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 0fa60f5..cbf5634 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1221,8 +1221,7 @@ void __init setup_arch(char **cmdline_p)
 	/*
 	 * get boot-time SMP configuration:
 	 */
-	if (smp_found_config)
-		get_smp_config();
+	get_smp_config();
 
 	prefill_possible_map();
 
diff --git a/arch/x86/mm/amdtopology.c b/arch/x86/mm/amdtopology.c
index ba47524..d1c7de0 100644
--- a/arch/x86/mm/amdtopology.c
+++ b/arch/x86/mm/amdtopology.c
@@ -52,21 +52,6 @@ static __init int find_northbridge(void)
 	return -ENOENT;
 }
 
-static __init void early_get_boot_cpu_id(void)
-{
-	/*
-	 * need to get the APIC ID of the BSP so can use that to
-	 * create apicid_to_node in amd_scan_nodes()
-	 */
-#ifdef CONFIG_X86_MPPARSE
-	/*
-	 * get boot-time SMP configuration:
-	 */
-	if (smp_found_config)
-		early_get_smp_config();
-#endif
-}
-
 int __init amd_numa_init(void)
 {
 	u64 start = PFN_PHYS(0);
@@ -180,8 +165,11 @@ int __init amd_numa_init(void)
 	cores = 1 << bits;
 	apicid_base = 0;
 
-	/* get the APIC ID of the BSP early for systems with apicid lifting */
-	early_get_boot_cpu_id();
+	/*
+	 * get boot-time SMP configuration:
+	 */
+	early_get_smp_config();
+
 	if (boot_cpu_physical_apicid > 0) {
 		pr_info("BSP APIC ID: %02x\n", boot_cpu_physical_apicid);
 		apicid_base = boot_cpu_physical_apicid;