[asahilinux:bits/110-smc 11/14] drivers/power/reset/macsmc-reboot.c:142:37: warning: declaration of 'struct power_off_data' will not be visible outside of this function

From: kernel test robot
Date: Tue May 03 2022 - 04:49:38 EST

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tree: https://github.com/AsahiLinux/linux bits/110-smc
head: dc3db43287ff1d44b447fff8ed6386b28b339f1c
commit: c65d40d51ad43c1cb61a2e8658005340a622b826 [11/14] power: reset: macsmc-reboot: Add driver for rebooting via Apple SMC
config: arm64-randconfig-r034-20220501 (https://download.01.org/0day-ci/archive/20220503/202205031650.5NKbmyGx-lkp@xxxxxxxxx/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 363b3a645a1e30011cc8da624f13dac5fd915628)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install arm64 cross compiling tool for clang build
# apt-get install binutils-aarch64-linux-gnu
# https://github.com/AsahiLinux/linux/commit/c65d40d51ad43c1cb61a2e8658005340a622b826
git remote add asahilinux https://github.com/AsahiLinux/linux
git fetch --no-tags asahilinux bits/110-smc
git checkout c65d40d51ad43c1cb61a2e8658005340a622b826
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/input/misc/ drivers/power/reset/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

drivers/power/reset/macsmc-reboot.c:54:25: error: field has incomplete type 'struct sys_off_handler'
struct sys_off_handler sys_off;
^
drivers/power/reset/macsmc-reboot.c:54:9: note: forward declaration of 'struct sys_off_handler'
struct sys_off_handler sys_off;
^
>> drivers/power/reset/macsmc-reboot.c:142:37: warning: declaration of 'struct power_off_data' will not be visible outside of this function [-Wvisibility]
static void macsmc_power_off(struct power_off_data *data)
^
drivers/power/reset/macsmc-reboot.c:144:37: error: incomplete definition of type 'struct power_off_data'
struct macsmc_reboot *reboot = data->cb_data;
~~~~^
drivers/power/reset/macsmc-reboot.c:142:37: note: forward declaration of 'struct power_off_data'
static void macsmc_power_off(struct power_off_data *data)
^
>> drivers/power/reset/macsmc-reboot.c:156:35: warning: declaration of 'struct restart_data' will not be visible outside of this function [-Wvisibility]
static void macsmc_restart(struct restart_data *data)
^
drivers/power/reset/macsmc-reboot.c:158:37: error: incomplete definition of type 'struct restart_data'
struct macsmc_reboot *reboot = data->cb_data;
~~~~^
drivers/power/reset/macsmc-reboot.c:156:35: note: forward declaration of 'struct restart_data'
static void macsmc_restart(struct restart_data *data)
^
>> drivers/power/reset/macsmc-reboot.c:170:42: warning: declaration of 'struct reboot_prep_data' will not be visible outside of this function [-Wvisibility]
static void macsmc_reboot_prepare(struct reboot_prep_data *data)
^
drivers/power/reset/macsmc-reboot.c:172:37: error: incomplete definition of type 'struct reboot_prep_data'
struct macsmc_reboot *reboot = data->cb_data;
~~~~^
drivers/power/reset/macsmc-reboot.c:170:42: note: forward declaration of 'struct reboot_prep_data'
static void macsmc_reboot_prepare(struct reboot_prep_data *data)
^
drivers/power/reset/macsmc-reboot.c:176:14: error: incomplete definition of type 'struct reboot_prep_data'
switch (data->mode) {
~~~~^
drivers/power/reset/macsmc-reboot.c:170:42: note: forward declaration of 'struct reboot_prep_data'
static void macsmc_reboot_prepare(struct reboot_prep_data *data)
^
drivers/power/reset/macsmc-reboot.c:289:37: error: use of undeclared identifier 'RESTART_PRIO_HIGH'
reboot->sys_off.restart_priority = RESTART_PRIO_HIGH;
^
drivers/power/reset/macsmc-reboot.c:292:8: error: call to undeclared function 'devm_register_sys_off_handler'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
ret = devm_register_sys_off_handler(&pdev->dev, &reboot->sys_off);
^
3 warnings and 7 errors generated.

vim +142 drivers/power/reset/macsmc-reboot.c

50
51 struct macsmc_reboot {
52 struct device *dev;
53 struct apple_smc *smc;
> 54 struct sys_off_handler sys_off;
55
56 union {
57 struct macsmc_reboot_nvmem nvm;
58 struct nvmem_cell *nvm_cells[ARRAY_SIZE(nvmem_names)];
59 };
60 };
61
62 /* Helpers to read/write a u8 given a struct nvmem_cell */
63 static int nvmem_cell_get_u8(struct nvmem_cell *cell)
64 {
65 size_t len;
66 u8 val;
67 void *ret = nvmem_cell_read(cell, &len);
68
69 if (IS_ERR(ret))
70 return PTR_ERR(ret);
71
72 if (len < 1) {
73 kfree(ret);
74 return -EINVAL;
75 }
76
77 val = *(u8 *)ret;
78 kfree(ret);
79 return val;
80 }
81
82 static int nvmem_cell_set_u8(struct nvmem_cell *cell, u8 val)
83 {
84 return nvmem_cell_write(cell, &val, sizeof(val));
85 }
86
87 static ssize_t macsmc_ac_power_mode_store(struct device *dev, struct device_attribute *attr,
88 const char *buf, size_t n)
89 {
90 struct macsmc_reboot *reboot = dev_get_drvdata(dev);
91 int mode;
92 int ret;
93
94 mode = sysfs_match_string(ac_power_modes, buf);
95 if (mode < 0)
96 return mode;
97
98 ret = nvmem_cell_set_u8(reboot->nvm.pm_setting, ac_power_mode_map[mode]);
99 if (ret < 0)
100 return ret;
101
102 return n;
103 }
104
105 static ssize_t macsmc_ac_power_mode_show(struct device *dev,
106 struct device_attribute *attr, char *buf)
107 {
108 struct macsmc_reboot *reboot = dev_get_drvdata(dev);
109 int len = 0;
110 int i;
111 int mode = nvmem_cell_get_u8(reboot->nvm.pm_setting);
112
113 if (mode < 0)
114 return mode;
115
116 for (i = 0; i < ARRAY_SIZE(ac_power_mode_map); i++)
117 if (mode == ac_power_mode_map[i])
118 len += scnprintf(buf+len, PAGE_SIZE-len,
119 "[%s] ", ac_power_modes[i]);
120 else
121 len += scnprintf(buf+len, PAGE_SIZE-len,
122 "%s ", ac_power_modes[i]);
123 buf[len-1] = '\n';
124 return len;
125 }
126 static DEVICE_ATTR(ac_power_mode, 0644, macsmc_ac_power_mode_show,
127 macsmc_ac_power_mode_store);
128
129 /*
130 * SMC 'MBSE' key actions:
131 *
132 * 'offw' - shutdown warning
133 * 'slpw' - sleep warning
134 * 'rest' - restart warning
135 * 'off1' - shutdown (needs PMU bit set to stay on)
136 * 'susp' - suspend
137 * 'phra' - restart ("PE Halt Restart Action"?)
138 * 'panb' - panic beginning
139 * 'pane' - panic end
140 */
141
> 142 static void macsmc_power_off(struct power_off_data *data)
143 {
144 struct macsmc_reboot *reboot = data->cb_data;
145
146 dev_info(reboot->dev, "Issuing power off (off1)\n");
147
148 if (apple_smc_write_u32_atomic(reboot->smc, SMC_KEY(MBSE), SMC_KEY(off1)) < 0) {
149 dev_err(reboot->dev, "Failed to issue MBSE = off1 (power_off)\n");
150 } else {
151 mdelay(100);
152 WARN_ON(1);
153 }
154 }
155
> 156 static void macsmc_restart(struct restart_data *data)
157 {
158 struct macsmc_reboot *reboot = data->cb_data;
159
160 dev_info(reboot->dev, "Issuing restart (phra)\n");
161
162 if (apple_smc_write_u32_atomic(reboot->smc, SMC_KEY(MBSE), SMC_KEY(phra)) < 0) {
163 dev_err(reboot->dev, "Failed to issue MBSE = phra (restart)\n");
164 } else {
165 mdelay(100);
166 WARN_ON(1);
167 }
168 }
169
> 170 static void macsmc_reboot_prepare(struct reboot_prep_data *data)
171 {
172 struct macsmc_reboot *reboot = data->cb_data;
173 u32 val;
174 u8 shutdown_flag;
175
176 switch (data->mode) {
177 case SYS_RESTART:
178 val = SMC_KEY(rest);
179 shutdown_flag = 0;
180 break;
181 case SYS_POWER_OFF:
182 val = SMC_KEY(offw);
183 shutdown_flag = 1;
184 break;
185 default:
186 return;
187 }
188
189 dev_info(reboot->dev, "Preparing for reboot (%p4ch)\n", &val);
190
191 /* On the Mac Mini, this will turn off the LED for power off */
192 if (apple_smc_write_u32(reboot->smc, SMC_KEY(MBSE), val) < 0)
193 dev_err(reboot->dev, "Failed to issue MBSE = %p4ch (reboot_prepare)\n", &val);
194
195 /* Set the boot_stage to 0, which means we're doing a clean shutdown/reboot. */
196 if (reboot->nvm.boot_stage &&
197 nvmem_cell_set_u8(reboot->nvm.boot_stage, BOOT_STAGE_SHUTDOWN) < 0)
198 dev_err(reboot->dev, "Failed to write boot_stage\n");
199
200 /*
201 * Set the PMU flag to actually reboot into the off state.
202 * Without this, the device will just reboot. We make it optional in case it is no longer
203 * necessary on newer hardware.
204 */
205 if (reboot->nvm.shutdown_flag &&
206 nvmem_cell_set_u8(reboot->nvm.shutdown_flag, shutdown_flag) < 0)
207 dev_err(reboot->dev, "Failed to write shutdown_flag\n");
208

--
0-DAY CI Kernel Test Service
https://01.org/lkp

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