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From: Borislav Petkov <bp@alien8.de>
To: X86 ML <x86@kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH] x86/cpu: Get rid of a local var in get_cpu_address_sizes()
Date: Sat, 16 Mar 2024 13:07:06 +0100	[thread overview]
Message-ID: <20240316120706.4352-1-bp@alien8.de> (raw)

From: "Borislav Petkov (AMD)" <bp@alien8.de>

Drop vp_bits_from_cpuid as it is not really needed.

No functional changes.

Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
---
 arch/x86/kernel/cpu/common.c | 17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index ba8cf5e9ce56..9a34651d24e7 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1053,18 +1053,9 @@ void get_cpu_cap(struct cpuinfo_x86 *c)
 void get_cpu_address_sizes(struct cpuinfo_x86 *c)
 {
 	u32 eax, ebx, ecx, edx;
-	bool vp_bits_from_cpuid = true;
 
 	if (!cpu_has(c, X86_FEATURE_CPUID) ||
-	    (c->extended_cpuid_level < 0x80000008))
-		vp_bits_from_cpuid = false;
-
-	if (vp_bits_from_cpuid) {
-		cpuid(0x80000008, &eax, &ebx, &ecx, &edx);
-
-		c->x86_virt_bits = (eax >> 8) & 0xff;
-		c->x86_phys_bits = eax & 0xff;
-	} else {
+	    (c->extended_cpuid_level < 0x80000008)) {
 		if (IS_ENABLED(CONFIG_X86_64)) {
 			c->x86_clflush_size = 64;
 			c->x86_phys_bits = 36;
@@ -1078,7 +1069,13 @@ void get_cpu_address_sizes(struct cpuinfo_x86 *c)
 			    cpu_has(c, X86_FEATURE_PSE36))
 				c->x86_phys_bits = 36;
 		}
+	} else {
+		cpuid(0x80000008, &eax, &ebx, &ecx, &edx);
+
+		c->x86_virt_bits = (eax >> 8) & 0xff;
+		c->x86_phys_bits = eax & 0xff;
 	}
+
 	c->x86_cache_bits = c->x86_phys_bits;
 	c->x86_cache_alignment = c->x86_clflush_size;
 }
-- 
2.43.0


             reply	other threads:[~2024-03-16 12:07 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-03-16 12:07 Borislav Petkov [this message]
2024-03-21 20:19 ` [tip: x86/cpu] x86/cpu: Get rid of an unnecessary local variable in get_cpu_address_sizes() tip-bot2 for Borislav Petkov (AMD)

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