Re: [PATCH v6] PM: Support aborting sleep during filesystem sync

[kernel test robot <lkp@intel.com>]

Hi Samuel,

kernel test robot noticed the following build errors:

[auto build test ERROR on rafael-pm/linux-next]
[also build test ERROR on rafael-pm/bleeding-edge linus/master v6.18-rc3 next-20251031]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Samuel-Wu/PM-Support-aborting-sleep-during-filesystem-sync/20251031-050330
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
patch link:    https://lore.kernel.org/r/20251030210110.298612-1-wusamuel%40google.com
patch subject: [PATCH v6] PM: Support aborting sleep during filesystem sync
config: sparc64-randconfig-002-20251031 (https://download.01.org/0day-ci/archive/20251031/202510312012.eHtS316T-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project d1c086e82af239b245fe8d7832f2753436634990)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251031/202510312012.eHtS316T-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
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202510312012.eHtS316T-lkp@intel.com/

All errors (new ones prefixed by >>):

>> kernel/power/main.c:1159:10: error: call to undeclared function 'pm_start_fs_sync_workqueue'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    1159 |         error = pm_start_fs_sync_workqueue();
         |                 ^
   kernel/power/main.c:1159:10: note: did you mean 'pm_start_workqueue'?
   kernel/power/main.c:1147:19: note: 'pm_start_workqueue' declared here
    1147 | static int __init pm_start_workqueue(void)
         |                   ^
    1148 | {
    1149 |         pm_wq = alloc_workqueue("pm", WQ_FREEZABLE | WQ_UNBOUND, 0);
    1150 | 
    1151 |         return pm_wq ? 0 : -ENOMEM;
    1152 | }
    1153 | 
    1154 | static int __init pm_init(void)
    1155 | {
    1156 |         int error = pm_start_workqueue();
    1157 |         if (error)
    1158 |                 return error;
    1159 |         error = pm_start_fs_sync_workqueue();
         |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~
         |                 pm_start_workqueue
   1 error generated.


vim +/pm_start_fs_sync_workqueue +1159 kernel/power/main.c

  1153	
  1154	static int __init pm_init(void)
  1155	{
  1156		int error = pm_start_workqueue();
  1157		if (error)
  1158			return error;
> 1159		error = pm_start_fs_sync_workqueue();
  1160		if (error)
  1161			return error;
  1162		hibernate_image_size_init();
  1163		hibernate_reserved_size_init();
  1164		pm_states_init();
  1165		power_kobj = kobject_create_and_add("power", NULL);
  1166		if (!power_kobj)
  1167			return -ENOMEM;
  1168		error = sysfs_create_groups(power_kobj, attr_groups);
  1169		if (error)
  1170			return error;
  1171		pm_print_times_init();
  1172		return pm_autosleep_init();
  1173	}
  1174	

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