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Message-Id: <20240528121124.3588248-1-arnd@kernel.org>
Date: Tue, 28 May 2024 14:09:23 +0200
From: Arnd Bergmann <arnd@...nel.org>
To: Huang Rui <ray.huang@....com>,
"Gautham R. Shenoy" <gautham.shenoy@....com>,
Mario Limonciello <mario.limonciello@....com>,
"Rafael J. Wysocki" <rafael@...nel.org>,
Viresh Kumar <viresh.kumar@...aro.org>,
Perry Yuan <perry.yuan@....com>,
Wyes Karny <wyes.karny@....com>
Cc: Arnd Bergmann <arnd@...db.de>,
Meng Li <li.meng@....com>,
Swapnil Sapkal <swapnil.sapkal@....com>,
linux-kernel@...r.kernel.org,
linux-pm@...r.kernel.org
Subject: [PATCH] cpufreq: amd-pstate: remove global header file
From: Arnd Bergmann <arnd@...db.de>
When extra warnings are enabled, gcc points out a global variable
definition in a header:
In file included from drivers/cpufreq/amd-pstate-ut.c:29:
include/linux/amd-pstate.h:123:27: error: 'amd_pstate_mode_string' defined but not used [-Werror=unused-const-variable=]
123 | static const char * const amd_pstate_mode_string[] = {
| ^~~~~~~~~~~~~~~~~~~~~~
This header is only included from two files in the same directory,
and one of them uses only a single definition from it, so clean it
up by moving most of the contents into the driver that uses them,
and making shared bits a local header file.
Fixes: 36c5014e5460 ("cpufreq: amd-pstate: optimize driver working mode selection in amd_pstate_param()")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
MAINTAINERS | 1 -
drivers/cpufreq/amd-pstate-ut.c | 3 +-
drivers/cpufreq/amd-pstate.c | 34 ++++++++++++++++++-
.../linux => drivers/cpufreq}/amd-pstate.h | 33 ------------------
4 files changed, 35 insertions(+), 36 deletions(-)
rename {include/linux => drivers/cpufreq}/amd-pstate.h (82%)
diff --git a/MAINTAINERS b/MAINTAINERS
index 070a39b2b098..35a75ab8ef05 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1107,7 +1107,6 @@ L: linux-pm@...r.kernel.org
S: Supported
F: Documentation/admin-guide/pm/amd-pstate.rst
F: drivers/cpufreq/amd-pstate*
-F: include/linux/amd-pstate.h
F: tools/power/x86/amd_pstate_tracer/amd_pstate_trace.py
AMD PTDMA DRIVER
diff --git a/drivers/cpufreq/amd-pstate-ut.c b/drivers/cpufreq/amd-pstate-ut.c
index f04ae67dda37..fc275d41d51e 100644
--- a/drivers/cpufreq/amd-pstate-ut.c
+++ b/drivers/cpufreq/amd-pstate-ut.c
@@ -26,10 +26,11 @@
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/fs.h>
-#include <linux/amd-pstate.h>
#include <acpi/cppc_acpi.h>
+#include "amd-pstate.h"
+
/*
* Abbreviations:
* amd_pstate_ut: used as a shortform for AMD P-State unit test.
diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
index 1b7e82a0ad2e..91993647e09e 100644
--- a/drivers/cpufreq/amd-pstate.c
+++ b/drivers/cpufreq/amd-pstate.c
@@ -36,7 +36,6 @@
#include <linux/delay.h>
#include <linux/uaccess.h>
#include <linux/static_call.h>
-#include <linux/amd-pstate.h>
#include <linux/topology.h>
#include <acpi/processor.h>
@@ -46,6 +45,8 @@
#include <asm/processor.h>
#include <asm/cpufeature.h>
#include <asm/cpu_device_id.h>
+
+#include "amd-pstate.h"
#include "amd-pstate-trace.h"
#define AMD_PSTATE_TRANSITION_LATENCY 20000
@@ -53,6 +54,37 @@
#define CPPC_HIGHEST_PERF_PERFORMANCE 196
#define CPPC_HIGHEST_PERF_DEFAULT 166
+#define AMD_CPPC_EPP_PERFORMANCE 0x00
+#define AMD_CPPC_EPP_BALANCE_PERFORMANCE 0x80
+#define AMD_CPPC_EPP_BALANCE_POWERSAVE 0xBF
+#define AMD_CPPC_EPP_POWERSAVE 0xFF
+
+/*
+ * enum amd_pstate_mode - driver working mode of amd pstate
+ */
+enum amd_pstate_mode {
+ AMD_PSTATE_UNDEFINED = 0,
+ AMD_PSTATE_DISABLE,
+ AMD_PSTATE_PASSIVE,
+ AMD_PSTATE_ACTIVE,
+ AMD_PSTATE_GUIDED,
+ AMD_PSTATE_MAX,
+};
+
+static const char * const amd_pstate_mode_string[] = {
+ [AMD_PSTATE_UNDEFINED] = "undefined",
+ [AMD_PSTATE_DISABLE] = "disable",
+ [AMD_PSTATE_PASSIVE] = "passive",
+ [AMD_PSTATE_ACTIVE] = "active",
+ [AMD_PSTATE_GUIDED] = "guided",
+ NULL,
+};
+
+struct quirk_entry {
+ u32 nominal_freq;
+ u32 lowest_freq;
+};
+
/*
* TODO: We need more time to fine tune processors with shared memory solution
* with community together.
diff --git a/include/linux/amd-pstate.h b/drivers/cpufreq/amd-pstate.h
similarity index 82%
rename from include/linux/amd-pstate.h
rename to drivers/cpufreq/amd-pstate.h
index d58fc022ec46..e6a28e7f4dbf 100644
--- a/include/linux/amd-pstate.h
+++ b/drivers/cpufreq/amd-pstate.h
@@ -1,7 +1,5 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
- * linux/include/linux/amd-pstate.h
- *
* Copyright (C) 2022 Advanced Micro Devices, Inc.
*
* Author: Meng Li <li.meng@....com>
@@ -12,11 +10,6 @@
#include <linux/pm_qos.h>
-#define AMD_CPPC_EPP_PERFORMANCE 0x00
-#define AMD_CPPC_EPP_BALANCE_PERFORMANCE 0x80
-#define AMD_CPPC_EPP_BALANCE_POWERSAVE 0xBF
-#define AMD_CPPC_EPP_POWERSAVE 0xFF
-
/*********************************************************************
* AMD P-state INTERFACE *
*********************************************************************/
@@ -108,30 +101,4 @@ struct amd_cpudata {
bool suspended;
};
-/*
- * enum amd_pstate_mode - driver working mode of amd pstate
- */
-enum amd_pstate_mode {
- AMD_PSTATE_UNDEFINED = 0,
- AMD_PSTATE_DISABLE,
- AMD_PSTATE_PASSIVE,
- AMD_PSTATE_ACTIVE,
- AMD_PSTATE_GUIDED,
- AMD_PSTATE_MAX,
-};
-
-static const char * const amd_pstate_mode_string[] = {
- [AMD_PSTATE_UNDEFINED] = "undefined",
- [AMD_PSTATE_DISABLE] = "disable",
- [AMD_PSTATE_PASSIVE] = "passive",
- [AMD_PSTATE_ACTIVE] = "active",
- [AMD_PSTATE_GUIDED] = "guided",
- NULL,
-};
-
-struct quirk_entry {
- u32 nominal_freq;
- u32 lowest_freq;
-};
-
#endif /* _LINUX_AMD_PSTATE_H */
--
2.39.2
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