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Peter Anvin" , Andrey Konovalov , bpf@vger.kernel.org, kernel-team@meta.com, kasan-dev@googlegroups.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH v1 1/5] x86/cpu: Factor init_cpu_info() out of identify_cpu() Date: Fri, 3 Jul 2026 17:20:42 -0700 Message-ID: <20260704002046.3859585-2-ihor.solodrai@linux.dev> In-Reply-To: <20260704002046.3859585-1-ihor.solodrai@linux.dev> References: <20260704002046.3859585-1-ihor.solodrai@linux.dev> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Rspam-User: X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 72BEA20004 X-Stat-Signature: deap5ite3hgpndx3wwxfdgbxqh1ii7ou X-HE-Tag: 1783124471-146435 X-HE-Meta: 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 xVOzZC6Y aHvfDqozIpIR+Qieu5e+gFylleSR89PfHe9WAXGTg5+aGASTPa90xeP35GzzaSQqgeRtW4jA2CK71c3+kyvowBOs5rcwyPMELHR+8+YQczDpEkCVFa5wjoTB9kZPMKQ3v+KOwIS0ip+CgJwik06mYdYg8JehgTqJZDy5AYGP3Fx/+Xphm8EQAEKcVEs64KPehxTyM8bN7ZRJ+MYOxHcEbNkbiT1w/esOuJ6Is5B1fCUH6fk2LoCz5wEHmyI52fa0GI7Td3ixG2qfs0sBQhwg7K9+pOPo7hbwdsrTSiimfuwkDq+hyV+V3VSJTfKNJInGLkOv1 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: identify_cpu() begins by resetting the struct cpuinfo_x86 fields to their unknown/default values and clearing the capability arrays with memset(). Move that reset into a new helper: init_cpu_info(). This is preparation for letting the callers decide whether the reset is needed. Signed-off-by: Ihor Solodrai --- arch/x86/kernel/cpu/common.c | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-) diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index a3df21d26460..505ce329e821 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -1993,14 +1993,8 @@ static void generic_identify(struct cpuinfo_x86 *c) #endif } -/* - * This does the hard work of actually picking apart the CPU stuff... - */ -static void identify_cpu(struct cpuinfo_x86 *c) +static void init_cpu_info(struct cpuinfo_x86 *c) { - int i; - - c->loops_per_jiffy = loops_per_jiffy; c->x86_cache_size = 0; c->x86_vendor = X86_VENDOR_UNKNOWN; c->x86_model = c->x86_stepping = 0; /* So far unknown... */ @@ -2022,6 +2016,15 @@ static void identify_cpu(struct cpuinfo_x86 *c) #ifdef CONFIG_X86_VMX_FEATURE_NAMES memset(&c->vmx_capability, 0, sizeof(c->vmx_capability)); #endif +} + +static void identify_cpu(struct cpuinfo_x86 *c) +{ + int i; + + c->loops_per_jiffy = loops_per_jiffy; + + init_cpu_info(c); generic_identify(c); -- 2.54.0