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SubjectRe: drivers/watchdog/rave-sp-wdt.c:278: undefined reference to `nvmem_cell_get'
On Tue, 13 Feb 2018, kbuild test robot wrote:

> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head: 178e834c47b0d01352c48730235aae69898fbc02
> commit: c3bb333457218ca4ed9553be47c0f567b4ef8a38 watchdog: Add RAVE SP watchdog driver
> date: 5 weeks ago
> config: x86_64-randconfig-u0-02131401 (attached as .config)
> compiler: gcc-5 (Debian 5.5.0-3) 5.4.1 20171010
> reproduce:
> git checkout c3bb333457218ca4ed9553be47c0f567b4ef8a38
> # save the attached .config to linux build tree
> make ARCH=x86_64
>
> All errors (new ones prefixed by >>):
>
> drivers/watchdog/rave-sp-wdt.o: In function `rave_sp_wdt_probe':
> >> drivers/watchdog/rave-sp-wdt.c:278: undefined reference to `nvmem_cell_get'
> >> drivers/watchdog/rave-sp-wdt.c:281: undefined reference to `nvmem_cell_read'
> >> drivers/watchdog/rave-sp-wdt.c:287: undefined reference to `nvmem_cell_put'
> make[2]: *** [vmlinux] Error 1

Looks like the RAVE Watchdog driver should select NVMEM?

> vim +278 drivers/watchdog/rave-sp-wdt.c
>
> 252
> 253 static int rave_sp_wdt_probe(struct platform_device *pdev)
> 254 {
> 255 struct device *dev = &pdev->dev;
> 256 struct watchdog_device *wdd;
> 257 struct rave_sp_wdt *sp_wd;
> 258 struct nvmem_cell *cell;
> 259 __le16 timeout = 0;
> 260 int ret;
> 261
> 262 sp_wd = devm_kzalloc(dev, sizeof(*sp_wd), GFP_KERNEL);
> 263 if (!sp_wd)
> 264 return -ENOMEM;
> 265
> 266 sp_wd->variant = of_device_get_match_data(dev);
> 267 sp_wd->sp = dev_get_drvdata(dev->parent);
> 268
> 269 wdd = &sp_wd->wdd;
> 270 wdd->parent = dev;
> 271 wdd->info = &rave_sp_wdt_info;
> 272 wdd->ops = &rave_sp_wdt_ops;
> 273 wdd->min_timeout = sp_wd->variant->min_timeout;
> 274 wdd->max_timeout = sp_wd->variant->max_timeout;
> 275 wdd->status = WATCHDOG_NOWAYOUT_INIT_STATUS;
> 276 wdd->timeout = 60;
> 277
> > 278 cell = nvmem_cell_get(dev, "wdt-timeout");
> 279 if (!IS_ERR(cell)) {
> 280 size_t len;
> > 281 void *value = nvmem_cell_read(cell, &len);
> 282
> 283 if (!IS_ERR(value)) {
> 284 memcpy(&timeout, value, min(len, sizeof(timeout)));
> 285 kfree(value);
> 286 }
> > 287 nvmem_cell_put(cell);
> 288 }
> 289 watchdog_init_timeout(wdd, le16_to_cpu(timeout), dev);
> 290 watchdog_set_restart_priority(wdd, 255);
> 291 watchdog_stop_on_unregister(wdd);
> 292
> 293 sp_wd->reboot_notifier.notifier_call = rave_sp_wdt_reboot_notifier;
> 294 ret = devm_register_reboot_notifier(dev, &sp_wd->reboot_notifier);
> 295 if (ret) {
> 296 dev_err(dev, "Failed to register reboot notifier\n");
> 297 return ret;
> 298 }
> 299
> 300 /*
> 301 * We don't know if watchdog is running now. To be sure, let's
> 302 * start it and depend on watchdog core to ping it
> 303 */
> 304 wdd->max_hw_heartbeat_ms = wdd->max_timeout * 1000;
> 305 ret = rave_sp_wdt_start(wdd);
> 306 if (ret) {
> 307 dev_err(dev, "Watchdog didn't start\n");
> 308 return ret;
> 309 }
> 310
> 311 ret = devm_watchdog_register_device(dev, wdd);
> 312 if (ret) {
> 313 dev_err(dev, "Failed to register watchdog device\n");
> 314 rave_sp_wdt_stop(wdd);
> 315 return ret;
> 316 }
> 317
> 318 return 0;
> 319 }
> 320
>
> ---
> 0-DAY kernel test infrastructure Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all Intel Corporation



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Lee Jones
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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