From: kernel test robot <lkp@intel.com>
To: Ye Bin <yebin10@huawei.com>
Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Linux Memory Management List <linux-mm@kvack.org>
Subject: drivers/acpi/x86/s2idle.c:165:51: warning: '%s' directive argument is null
Date: Thu, 17 Sep 2026 13:19:32 +0800 [thread overview]
Message-ID: <202609171325.a3EAE6OV-lkp@intel.com> (raw)
Hi Ye,
FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 9b87fdc9af2fbfcdb5c24a64139685ef80f6573f
commit: 6c2e6e2c1af1809d1d9cdbd50ac80f54f5995bdb dynamic_debug: add support for print stack
date: 10 months ago
config: x86_64-randconfig-007-20250922 (https://download.01.org/0day-ci/archive/20260917/202609171325.a3EAE6OV-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260917/202609171325.a3EAE6OV-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Fixes: 6c2e6e2c1af1 ("dynamic_debug: add support for print stack")
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202609171325.a3EAE6OV-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from include/asm-generic/bug.h:22,
from arch/x86/include/asm/bug.h:108,
from arch/x86/include/asm/alternative.h:9,
from arch/x86/include/asm/barrier.h:5,
from include/linux/list.h:11,
from include/linux/resource_ext.h:9,
from include/linux/acpi.h:13,
from drivers/acpi/x86/s2idle.c:18:
drivers/acpi/x86/s2idle.c: In function 'lpi_device_get_constraints_amd':
>> drivers/acpi/x86/s2idle.c:165:51: warning: '%s' directive argument is null [-Wformat-overflow=]
165 | "Name:%s, Enabled: %d, States: %d, MinDstate: %d\n",
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/printk.h:402:21: note: in definition of macro 'pr_fmt'
402 | #define pr_fmt(fmt) fmt
| ^~~
include/linux/dynamic_debug.h:259:9: note: in expansion of macro '__dynamic_func_call_cls'
259 | __dynamic_func_call_cls(__UNIQUE_ID(ddebug), cls, fmt, func, ##__VA_ARGS__)
| ^~~~~~~~~~~~~~~~~~~~~~~
include/linux/dynamic_debug.h:261:9: note: in expansion of macro '_dynamic_func_call_cls'
261 | _dynamic_func_call_cls(_DPRINTK_CLASS_DFLT, fmt, func, ##__VA_ARGS__)
| ^~~~~~~~~~~~~~~~~~~~~~
include/linux/acpi.h:1268:9: note: in expansion of macro '_dynamic_func_call'
1268 | _dynamic_func_call(fmt, __acpi_handle_debug, \
| ^~~~~~~~~~~~~~~~~~
drivers/acpi/x86/s2idle.c:164:33: note: in expansion of macro 'acpi_handle_debug'
164 | acpi_handle_debug(lps0_device_handle,
| ^~~~~~~~~~~~~~~~~
drivers/acpi/x86/s2idle.c:165:57: note: format string is defined here
165 | "Name:%s, Enabled: %d, States: %d, MinDstate: %d\n",
| ^~
vim +165 drivers/acpi/x86/s2idle.c
fef98671194be0 Rafael J. Wysocki 2020-12-17 96
41233988112f0f Andy Shevchenko 2023-08-18 97 #define for_each_lpi_constraint(entry) \
41233988112f0f Andy Shevchenko 2023-08-18 98 for (int i = 0; \
41233988112f0f Andy Shevchenko 2023-08-18 99 entry = &lpi_constraints_table[i], i < lpi_constraints_table_size; \
41233988112f0f Andy Shevchenko 2023-08-18 100 i++)
41233988112f0f Andy Shevchenko 2023-08-18 101
fef98671194be0 Rafael J. Wysocki 2020-12-17 102 static void lpi_device_get_constraints_amd(void)
fef98671194be0 Rafael J. Wysocki 2020-12-17 103 {
fef98671194be0 Rafael J. Wysocki 2020-12-17 104 union acpi_object *out_obj;
fef98671194be0 Rafael J. Wysocki 2020-12-17 105 int i, j, k;
fef98671194be0 Rafael J. Wysocki 2020-12-17 106
fef98671194be0 Rafael J. Wysocki 2020-12-17 107 out_obj = acpi_evaluate_dsm_typed(lps0_device_handle, &lps0_dsm_guid,
904d4a6c074b9d Pratik Vishwakarma 2021-06-17 108 rev_id, ACPI_LPS0_GET_DEVICE_CONSTRAINTS,
fef98671194be0 Rafael J. Wysocki 2020-12-17 109 NULL, ACPI_TYPE_PACKAGE);
fef98671194be0 Rafael J. Wysocki 2020-12-17 110
fef98671194be0 Rafael J. Wysocki 2020-12-17 111 acpi_handle_debug(lps0_device_handle, "_DSM function 1 eval %s\n",
fef98671194be0 Rafael J. Wysocki 2020-12-17 112 out_obj ? "successful" : "failed");
fef98671194be0 Rafael J. Wysocki 2020-12-17 113
4a012dc82d504f Pratik Vishwakarma 2021-06-17 114 if (!out_obj)
4a012dc82d504f Pratik Vishwakarma 2021-06-17 115 return;
4a012dc82d504f Pratik Vishwakarma 2021-06-17 116
fef98671194be0 Rafael J. Wysocki 2020-12-17 117 for (i = 0; i < out_obj->package.count; i++) {
fef98671194be0 Rafael J. Wysocki 2020-12-17 118 union acpi_object *package = &out_obj->package.elements[i];
fef98671194be0 Rafael J. Wysocki 2020-12-17 119
aa7a1bb02bb443 Rafael J. Wysocki 2021-01-05 120 if (package->type == ACPI_TYPE_PACKAGE) {
883cf0d4cf2883 Mario Limonciello 2023-08-18 121 if (lpi_constraints_table) {
883cf0d4cf2883 Mario Limonciello 2023-08-18 122 acpi_handle_err(lps0_device_handle,
883cf0d4cf2883 Mario Limonciello 2023-08-18 123 "Duplicate constraints list\n");
883cf0d4cf2883 Mario Limonciello 2023-08-18 124 goto free_acpi_buffer;
883cf0d4cf2883 Mario Limonciello 2023-08-18 125 }
883cf0d4cf2883 Mario Limonciello 2023-08-18 126
fef98671194be0 Rafael J. Wysocki 2020-12-17 127 lpi_constraints_table = kcalloc(package->package.count,
fef98671194be0 Rafael J. Wysocki 2020-12-17 128 sizeof(*lpi_constraints_table),
fef98671194be0 Rafael J. Wysocki 2020-12-17 129 GFP_KERNEL);
fef98671194be0 Rafael J. Wysocki 2020-12-17 130
fef98671194be0 Rafael J. Wysocki 2020-12-17 131 if (!lpi_constraints_table)
fef98671194be0 Rafael J. Wysocki 2020-12-17 132 goto free_acpi_buffer;
fef98671194be0 Rafael J. Wysocki 2020-12-17 133
fef98671194be0 Rafael J. Wysocki 2020-12-17 134 acpi_handle_debug(lps0_device_handle,
fef98671194be0 Rafael J. Wysocki 2020-12-17 135 "LPI: constraints list begin:\n");
fef98671194be0 Rafael J. Wysocki 2020-12-17 136
3c6b1212d20bbb Mario Limonciello 2023-08-18 137 for (j = 0; j < package->package.count; j++) {
fef98671194be0 Rafael J. Wysocki 2020-12-17 138 union acpi_object *info_obj = &package->package.elements[j];
fef98671194be0 Rafael J. Wysocki 2020-12-17 139 struct lpi_device_constraint_amd dev_info = {};
fef98671194be0 Rafael J. Wysocki 2020-12-17 140 struct lpi_constraints *list;
fef98671194be0 Rafael J. Wysocki 2020-12-17 141 acpi_status status;
fef98671194be0 Rafael J. Wysocki 2020-12-17 142
9cc8cd086f05d9 Mario Limonciello 2023-08-18 143 list = &lpi_constraints_table[lpi_constraints_table_size];
9cc8cd086f05d9 Mario Limonciello 2023-08-18 144
3c6b1212d20bbb Mario Limonciello 2023-08-18 145 for (k = 0; k < info_obj->package.count; k++) {
fef98671194be0 Rafael J. Wysocki 2020-12-17 146 union acpi_object *obj = &info_obj->package.elements[k];
fef98671194be0 Rafael J. Wysocki 2020-12-17 147
fef98671194be0 Rafael J. Wysocki 2020-12-17 148 switch (k) {
fef98671194be0 Rafael J. Wysocki 2020-12-17 149 case 0:
fef98671194be0 Rafael J. Wysocki 2020-12-17 150 dev_info.enabled = obj->integer.value;
fef98671194be0 Rafael J. Wysocki 2020-12-17 151 break;
fef98671194be0 Rafael J. Wysocki 2020-12-17 152 case 1:
fef98671194be0 Rafael J. Wysocki 2020-12-17 153 dev_info.name = obj->string.pointer;
fef98671194be0 Rafael J. Wysocki 2020-12-17 154 break;
fef98671194be0 Rafael J. Wysocki 2020-12-17 155 case 2:
fef98671194be0 Rafael J. Wysocki 2020-12-17 156 dev_info.function_states = obj->integer.value;
fef98671194be0 Rafael J. Wysocki 2020-12-17 157 break;
fef98671194be0 Rafael J. Wysocki 2020-12-17 158 case 3:
fef98671194be0 Rafael J. Wysocki 2020-12-17 159 dev_info.min_dstate = obj->integer.value;
fef98671194be0 Rafael J. Wysocki 2020-12-17 160 break;
fef98671194be0 Rafael J. Wysocki 2020-12-17 161 }
9cc8cd086f05d9 Mario Limonciello 2023-08-18 162 }
fef98671194be0 Rafael J. Wysocki 2020-12-17 163
a879058d01e2f6 Mario Limonciello 2023-08-18 164 acpi_handle_debug(lps0_device_handle,
a879058d01e2f6 Mario Limonciello 2023-08-18 @165 "Name:%s, Enabled: %d, States: %d, MinDstate: %d\n",
a879058d01e2f6 Mario Limonciello 2023-08-18 166 dev_info.name,
a879058d01e2f6 Mario Limonciello 2023-08-18 167 dev_info.enabled,
a879058d01e2f6 Mario Limonciello 2023-08-18 168 dev_info.function_states,
a879058d01e2f6 Mario Limonciello 2023-08-18 169 dev_info.min_dstate);
a879058d01e2f6 Mario Limonciello 2023-08-18 170
fef98671194be0 Rafael J. Wysocki 2020-12-17 171 if (!dev_info.enabled || !dev_info.name ||
fef98671194be0 Rafael J. Wysocki 2020-12-17 172 !dev_info.min_dstate)
fef98671194be0 Rafael J. Wysocki 2020-12-17 173 continue;
fef98671194be0 Rafael J. Wysocki 2020-12-17 174
9cc8cd086f05d9 Mario Limonciello 2023-08-18 175 status = acpi_get_handle(NULL, dev_info.name, &list->handle);
fef98671194be0 Rafael J. Wysocki 2020-12-17 176 if (ACPI_FAILURE(status))
fef98671194be0 Rafael J. Wysocki 2020-12-17 177 continue;
fef98671194be0 Rafael J. Wysocki 2020-12-17 178
fef98671194be0 Rafael J. Wysocki 2020-12-17 179 list->min_dstate = dev_info.min_dstate;
fef98671194be0 Rafael J. Wysocki 2020-12-17 180
fef98671194be0 Rafael J. Wysocki 2020-12-17 181 lpi_constraints_table_size++;
fef98671194be0 Rafael J. Wysocki 2020-12-17 182 }
fef98671194be0 Rafael J. Wysocki 2020-12-17 183 }
fef98671194be0 Rafael J. Wysocki 2020-12-17 184 }
fef98671194be0 Rafael J. Wysocki 2020-12-17 185
fef98671194be0 Rafael J. Wysocki 2020-12-17 186 acpi_handle_debug(lps0_device_handle, "LPI: constraints list end\n");
fef98671194be0 Rafael J. Wysocki 2020-12-17 187
fef98671194be0 Rafael J. Wysocki 2020-12-17 188 free_acpi_buffer:
fef98671194be0 Rafael J. Wysocki 2020-12-17 189 ACPI_FREE(out_obj);
fef98671194be0 Rafael J. Wysocki 2020-12-17 190 }
fef98671194be0 Rafael J. Wysocki 2020-12-17 191
:::::: The code at line 165 was first introduced by commit
:::::: a879058d01e2f6e324cc98ff2ffbe4f574c100a6 ACPI: x86: s2idle: Add more debugging for AMD constraints parsing
:::::: TO: Mario Limonciello <mario.limonciello@amd.com>
:::::: CC: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
next reply other threads:[~2026-09-17 5:19 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-17 5:19 kernel test robot [this message]
-- strict thread matches above, loose matches on Subject: below --
2026-05-26 10:47 drivers/acpi/x86/s2idle.c:165:51: warning: '%s' directive argument is null kernel test robot
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