Hi Dave,

I love your patch! Yet something to improve:

[auto build test ERROR on vkoul-dmaengine/next]
[also build test ERROR on linus/master v5.9-rc6]
[cannot apply to tip/x86/core tip/master next-20200924]
[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]

url:    https://github.com/0day-ci/linux/commits/Dave-Jiang/Add-shared-workqueue-support-for-idxd-driver/20200925-020242
base:   https://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine.git next
config: x86_64-allyesconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce (this is a W=1 build):
        # save the attached .config to linux build tree
        make W=1 ARCH=x86_64 

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

All errors (new ones prefixed by >>):

   In file included from arch/x86/include/asm/tsc.h:9,
                    from arch/x86/include/asm/timex.h:6,
                    from include/linux/timex.h:65,
                    from include/linux/time32.h:13,
                    from include/linux/time.h:73,
                    from include/linux/stat.h:19,
                    from include/linux/module.h:13,
                    from drivers/dma/idxd/init.c:5:
   drivers/dma/idxd/init.c: In function 'idxd_init_module':
>> drivers/dma/idxd/init.c:525:20: error: 'X86_FEATURE_ENQCMD' undeclared (first use in this function); did you mean 'X86_FEATURE_PCID'?
     525 |  if (!boot_cpu_has(X86_FEATURE_ENQCMD))
         |                    ^~~~~~~~~~~~~~~~~~
   arch/x86/include/asm/cpufeature.h:118:24: note: in definition of macro 'cpu_has'
     118 |  (__builtin_constant_p(bit) && REQUIRED_MASK_BIT_SET(bit) ? 1 : \
         |                        ^~~
   drivers/dma/idxd/init.c:525:7: note: in expansion of macro 'boot_cpu_has'
     525 |  if (!boot_cpu_has(X86_FEATURE_ENQCMD))
         |       ^~~~~~~~~~~~
   drivers/dma/idxd/init.c:525:20: note: each undeclared identifier is reported only once for each function it appears in
     525 |  if (!boot_cpu_has(X86_FEATURE_ENQCMD))
         |                    ^~~~~~~~~~~~~~~~~~
   arch/x86/include/asm/cpufeature.h:118:24: note: in definition of macro 'cpu_has'
     118 |  (__builtin_constant_p(bit) && REQUIRED_MASK_BIT_SET(bit) ? 1 : \
         |                        ^~~
   drivers/dma/idxd/init.c:525:7: note: in expansion of macro 'boot_cpu_has'
     525 |  if (!boot_cpu_has(X86_FEATURE_ENQCMD))
         |       ^~~~~~~~~~~~

# https://github.com/0day-ci/linux/commit/8c78721a970a316ba914bdaaea606e152462fe94
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Dave-Jiang/Add-shared-workqueue-support-for-idxd-driver/20200925-020242
git checkout 8c78721a970a316ba914bdaaea606e152462fe94
vim +525 drivers/dma/idxd/init.c

   511	
   512	static int __init idxd_init_module(void)
   513	{
   514		int err, i;
   515	
   516		/*
   517		 * If the CPU does not support MOVDIR64B or ENQCMDS, there's no point in
   518		 * enumerating the device. We can not utilize it.
   519		 */
   520		if (!boot_cpu_has(X86_FEATURE_MOVDIR64B)) {
   521			pr_warn("idxd driver failed to load without MOVDIR64B.\n");
   522			return -ENODEV;
   523		}
   524	
 > 525		if (!boot_cpu_has(X86_FEATURE_ENQCMD))
   526			pr_warn("Platform does not have ENQCMD(S) support.\n");
   527		else
   528			support_enqcmd = true;
   529	
   530		mutex_init(&idxd_idr_lock);
   531		for (i = 0; i < IDXD_TYPE_MAX; i++)
   532			idr_init(&idxd_idrs[i]);
   533	
   534		err = idxd_register_bus_type();
   535		if (err < 0)
   536			return err;
   537	
   538		err = idxd_register_driver();
   539		if (err < 0)
   540			goto err_idxd_driver_register;
   541	
   542		err = idxd_cdev_register();
   543		if (err)
   544			goto err_cdev_register;
   545	
   546		err = pci_register_driver(&idxd_pci_driver);
   547		if (err)
   548			goto err_pci_register;
   549	
   550		return 0;
   551	
   552	err_pci_register:
   553		idxd_cdev_remove();
   554	err_cdev_register:
   555		idxd_unregister_driver();
   556	err_idxd_driver_register:
   557		idxd_unregister_bus_type();
   558		return err;
   559	}
   560	module_init(idxd_init_module);
   561	

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