add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/cpufreq/powernow-k8.c
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@@ -1,8 +1,6 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  *   (c) 2003-2012 Advanced Micro Devices, Inc.
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- *  Your use of this code is subject to the terms and conditions of the
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- *  GNU general public license version 2. See "COPYING" or
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- *  http://www.gnu.org/licenses/gpl.html
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  *
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  *  Maintainer:
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  *  Andreas Herrmann <herrmann.der.user@googlemail.com>
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@@ -11,7 +9,6 @@
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  *  (C) 2003 Dave Jones on behalf of SuSE Labs
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  *  (C) 2004 Dominik Brodowski <linux@brodo.de>
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  *  (C) 2004 Pavel Machek <pavel@ucw.cz>
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- *  Licensed under the terms of the GNU GPL License version 2.
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  *  Based upon datasheets & sample CPUs kindly provided by AMD.
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  *
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  *  Valuable input gratefully received from Dave Jones, Pavel Machek,
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@@ -89,7 +86,7 @@
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  */
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 static int pending_bit_stuck(void)
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 {
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-	u32 lo, hi;
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+	u32 lo, hi __always_unused;
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 	rdmsr(MSR_FIDVID_STATUS, lo, hi);
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 	return lo & MSR_S_LO_CHANGE_PENDING ? 1 : 0;
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@@ -285,7 +282,7 @@
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 {
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 	u32 rvosteps = data->rvo;
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 	u32 savefid = data->currfid;
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-	u32 maxvid, lo, rvomult = 1;
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+	u32 maxvid, lo __always_unused, rvomult = 1;
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 	pr_debug("ph1 (cpu%d): start, currfid 0x%x, currvid 0x%x, reqvid 0x%x, rvo 0x%x\n",
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 		smp_processor_id(),
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@@ -455,7 +452,7 @@
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 static const struct x86_cpu_id powernow_k8_ids[] = {
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 	/* IO based frequency switching */
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-	{ X86_VENDOR_AMD, 0xf },
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+	X86_MATCH_VENDOR_FAM(AMD, 0xf, NULL),
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 	{}
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 };
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 MODULE_DEVICE_TABLE(x86cpu, powernow_k8_ids);
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@@ -1104,7 +1101,8 @@
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 	kfree(data->powernow_table);
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 	kfree(data);
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-	for_each_cpu(cpu, pol->cpus)
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+	/* pol->cpus will be empty here, use related_cpus instead. */
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+	for_each_cpu(cpu, pol->related_cpus)
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 		per_cpu(powernow_data, cpu) = NULL;
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 	return 0;
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@@ -1175,7 +1173,7 @@
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 	unsigned int i, supported_cpus = 0;
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 	int ret;
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-	if (static_cpu_has(X86_FEATURE_HW_PSTATE)) {
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+	if (boot_cpu_has(X86_FEATURE_HW_PSTATE)) {
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 		__request_acpi_cpufreq();
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 		return -ENODEV;
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 	}