From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f201.google.com (mail-pf1-f201.google.com [209.85.210.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7D1DA4D2EC5 for ; Wed, 1 Jul 2026 19:32:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782934354; cv=none; b=ORQ2h/gH/GaBruGGptoLJqoOlzViYB6QJJdZ1pmHVMzYcDBMGiH+o/XZRSxAZAym/5WhiofIip1Cr8H2m2PwAhP3CWk7ROdTZh11S5m/c1gjRmLxHK19ottA+2KPmC5MTh8mC6TlG+YPGuUI9bNO5CWSejBwfT+UixE0A+0Fj3I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782934354; c=relaxed/simple; bh=m7RzfJ+dglccDpbLj8Vzsd5+h0OdO8Af8uWyaDtsUyA=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=UpyBqNBH3neFWv3A5I29njqj1WqPRfRNDNc5yXF6vPbMI2JL589gAOWynddHhhiz1T6rwo6H2Zdi865VrzL/nHRCsgK/G6oAzVOjwr77/nushp20KyroPBo5YnCaIWPnTojbqQiVibkyTqtMM2PgY+nPfMAvLdvgopA5M7jpb50= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=jlWPsOz5; arc=none smtp.client-ip=209.85.210.201 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="jlWPsOz5" Received: by mail-pf1-f201.google.com with SMTP id d2e1a72fcca58-8478d2bea7cso1833103b3a.1 for ; Wed, 01 Jul 2026 12:32:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1782934352; x=1783539152; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:from:to:cc:subject:date:message-id:reply-to; bh=s/QSbcUaf8Mr1OX5FYkbnza8ilhhfuHPZoXwnM4X05U=; b=jlWPsOz55Wm+xZIEcmfOM3gE+Eg7Py0kz1c7l35lC0aS2sWXxWHzsPEH01Qu0L4kg2 sv16BZsxj1L1/q0CXgsQ/r42w9bVOygfqVnemNXYUcthFOOwHaPef4xxltB6CKvOvk2Y ncBvaI1Ubicjl/A1XIVmyB07uibZ0g+HU99SJZmGLQjgv6vM7JHAul4bWaz3Y2zHK9rT aSDLJCplhj4ty177sF+QvTsjC/FDNJfiqOQmM5mN7FVGsiAohogLMoGLNCtgdxP93/dm hk9M08eCaEHOvj3lf5LhXDt1RivVKP70K2LKrTkU1igc+uXIUM7z1z3flGmUjqtUZ59a w8eg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1782934352; x=1783539152; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=s/QSbcUaf8Mr1OX5FYkbnza8ilhhfuHPZoXwnM4X05U=; b=QFEkSSkhByExcuSQOJ7M4oIvVphw/JfR/jhCw5UvTSb+uIWByQl0AQYnvQWZ0Z7Mri LgMpYpUZgIefIZBfjb9Gktutcqzwjs2ZOTXYiff9sPW6DlO8JxrVAus3JvXY0dXVfYsz hcgk+HYq+uemNOdMPhh+d0dQ+TFT8UiiKfFwk4cuc42vH/L6Vftawdpkmvhijh/zi9tl 2UZ0Sh/1V4gW02JOwYHCE5ju/9iR/4WoshHCWTIpWtl7b3kzJ75ADVJ32TBNYY/kSjUn 8X3+YaKOvNIgtSrnDS8hkcz5JrZIGAaB2L98omW+Bs1BIYAf4zr8PcTE/n9YIMPuvSgO GqJg== X-Forwarded-Encrypted: i=1; AHgh+RptnjC7/2NRQG/NS72O1riYse0guHkOBJ291n1e0f+uFVH0XLPK2m0wzgLZEqIrHL2bvfFzTFchwIUAvKk=@vger.kernel.org X-Gm-Message-State: AOJu0Yz/8afbv9P8vA3LqR+IZ5qLeM9WY+2EWXB+vfitmTBrL1pWdZI4 dKCRyYmMZCWsXJwrJ7884BtOySpQDY/OHn4Oyv4YlBXPgDzzYgFsdC91c1k//h4nYjQhsuN8I8Z blwOY/g== X-Received: from pfbhc3.prod.google.com ([2002:a05:6a00:6503:b0:846:aff8:5614]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a00:3e10:b0:842:499d:450e with SMTP id d2e1a72fcca58-847a82d978dmr5886277b3a.20.1782934351240; Wed, 01 Jul 2026 12:32:31 -0700 (PDT) Reply-To: Sean Christopherson Date: Wed, 1 Jul 2026 12:31:25 -0700 In-Reply-To: <20260701193212.749551-1-seanjc@google.com> Precedence: bulk X-Mailing-List: linux-hyperv@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260701193212.749551-1-seanjc@google.com> X-Mailer: git-send-email 2.55.0.rc0.799.gd6f94ed593-goog Message-ID: <20260701193212.749551-5-seanjc@google.com> Subject: [PATCH v5 04/51] x86/tsc: Restrict recalibrate_cpu_khz() export to p4-clockmod and powernow-k7 From: Sean Christopherson To: Jonathan Corbet , Paolo Bonzini , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, Kiryl Shutsemau , Rick Edgecombe , Sean Christopherson , "K. Y. Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , Long Li , Ajay Kaher , Alexey Makhalov , Jan Kiszka , Andy Lutomirski , Peter Zijlstra , Juergen Gross , Daniel Lezcano , John Stultz Cc: Shuah Khan , "H. Peter Anvin" , Vitaly Kuznetsov , Broadcom internal kernel review list , Boris Ostrovsky , Stephen Boyd , linux-doc@vger.kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-coco@lists.linux.dev, linux-hyperv@vger.kernel.org, virtualization@lists.linux.dev, xen-devel@lists.xenproject.org, Tom Lendacky , Nikunj A Dadhania , David Woodhouse , David Woodhouse , Michael Kelley , Thomas Gleixner Content-Type: text/plain; charset="UTF-8" Export recalibrate_cpu_khz() only for its two users, p4-clockmod.ko and powernow-k7.ko, to help document that recalibration is relevant only to ancient CPUs. For all intents and purposes, no functional change intended. Signed-off-by: Sean Christopherson --- arch/x86/kernel/tsc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c index 4393902c0ddd..482cc3a8999a 100644 --- a/arch/x86/kernel/tsc.c +++ b/arch/x86/kernel/tsc.c @@ -943,7 +943,7 @@ void recalibrate_cpu_khz(void) cpu_khz_old, cpu_khz); #endif } -EXPORT_SYMBOL_GPL(recalibrate_cpu_khz); +EXPORT_SYMBOL_FOR_MODULES(recalibrate_cpu_khz, "p4-clockmod,powernow-k7"); static unsigned long long cyc2ns_suspend; -- 2.55.0.rc0.799.gd6f94ed593-goog