From: Thomas Gleixner <tglx@linutronix.de>
Date: Tue, 5 Jun 2018 22:36:15 +0000 (+0200)
Subject: x86/cpu: Remove the pointless CPU printout
X-Git-Tag: v4.1.12-124.31.3~657
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=a98594cd1bdace9be0eaf6be16107fa00584339d;p=users%2Fjedix%2Flinux-maple.git

x86/cpu: Remove the pointless CPU printout

The value of this printout is dubious at best and there is no point in
having it in two different places along with convoluted ways to reach it.

Remove it completely.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Acked-by: Ingo Molnar <mingo@kernel.org>

Orabug: 28220674
CVE: CVE-2018-3620

(cherry picked from commit 55e6d279abd92cfd7576bba031e7589be8475edb)

Signed-off-by: Mihai Carabas <mihai.carabas@oracle.com>
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>

Conflicts:
	arch/x86/kernel/cpu/common.c
	arch/x86/kernel/cpu/topology.c
Contextual
---

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 521c48e00c60..82af675cd3b4 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -579,13 +579,12 @@ void detect_ht(struct cpuinfo_x86 *c)
 #ifdef CONFIG_X86_HT
 	u32 eax, ebx, ecx, edx;
 	int index_msb, core_bits;
-	static bool printed;
 
 	if (!cpu_has(c, X86_FEATURE_HT))
 		return;
 
 	if (cpu_has(c, X86_FEATURE_CMP_LEGACY))
-		goto out;
+		return;
 
 	if (cpu_has(c, X86_FEATURE_XTOPOLOGY))
 		return;
@@ -594,14 +593,14 @@ void detect_ht(struct cpuinfo_x86 *c)
 
 	smp_num_siblings = (ebx & 0xff0000) >> 16;
 
+	if (!smp_num_siblings)
+		smp_num_siblings = 1;
+
 	if (smp_num_siblings == 1) {
 		printk_once(KERN_INFO "CPU0: Hyper-Threading is disabled\n");
-		goto out;
+		return;
 	}
 
-	if (smp_num_siblings <= 1)
-		goto out;
-
 	index_msb = get_count_order(smp_num_siblings);
 	c->phys_proc_id = apic->phys_pkg_id(c->initial_apicid, index_msb);
 
@@ -613,15 +612,6 @@ void detect_ht(struct cpuinfo_x86 *c)
 
 	c->cpu_core_id = apic->phys_pkg_id(c->initial_apicid, index_msb) &
 				       ((1 << core_bits) - 1);
-
-out:
-	if (!printed && (c->x86_max_cores * smp_num_siblings) > 1) {
-		printk(KERN_INFO  "CPU: Physical Processor ID: %d\n",
-		       c->phys_proc_id);
-		printk(KERN_INFO  "CPU: Processor Core ID: %d\n",
-		       c->cpu_core_id);
-		printed = 1;
-	}
 #endif
 }
 
diff --git a/arch/x86/kernel/cpu/topology.c b/arch/x86/kernel/cpu/topology.c
index 4c60eaf0571c..2c30e2cf1f1a 100644
--- a/arch/x86/kernel/cpu/topology.c
+++ b/arch/x86/kernel/cpu/topology.c
@@ -32,7 +32,6 @@ void detect_extended_topology(struct cpuinfo_x86 *c)
 	unsigned int eax, ebx, ecx, edx, sub_index;
 	unsigned int ht_mask_width, core_plus_mask_width;
 	unsigned int core_select_mask, core_level_siblings;
-	static bool printed;
 
 	if (c->cpuid_level < 0xb)
 		return;
@@ -86,14 +85,6 @@ void detect_extended_topology(struct cpuinfo_x86 *c)
 
 	c->x86_max_cores = (core_level_siblings / smp_num_siblings);
 
-	if (!printed) {
-		printk(KERN_INFO  "CPU: Physical Processor ID: %d\n",
-		       c->phys_proc_id);
-		if (c->x86_max_cores > 1)
-			printk(KERN_INFO  "CPU: Processor Core ID: %d\n",
-			       c->cpu_core_id);
-		printed = 1;
-	}
 	return;
 #endif
 }