linux-kernel - [jgunthorpe:vfio_iommufd 15/26] drivers/iommu/iommufd/selftest.c:651:36: warning: comparison between 'enum <anonymous>' and 'enum <anonymous>'

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Message-ID: <202210051114.7NzV94C7-lkp@intel.com>
Date:   Wed, 5 Oct 2022 11:38:13 +0800
From:   kernel test robot <lkp@...el.com>
To:     Jason Gunthorpe <jgg@...dia.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Nicolin Chen <nicolinc@...dia.com>, Yi Liu <yi.l.liu@...el.com>
Subject: [jgunthorpe:vfio_iommufd 15/26]
 drivers/iommu/iommufd/selftest.c:651:36: warning: comparison between 'enum
 <anonymous>' and 'enum <anonymous>'

tree:   https://github.com/jgunthorpe/linux vfio_iommufd
head:   c639c250f6f5b991f23efa0e76fe5ca689eae450
commit: 1e7593dc23967efedd0530c97e2ccfe0892ebba8 [15/26] iommufd: Add a selftest
config: s390-allmodconfig
compiler: s390-linux-gcc (GCC) 12.1.0
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
        # https://github.com/jgunthorpe/linux/commit/1e7593dc23967efedd0530c97e2ccfe0892ebba8
        git remote add jgunthorpe https://github.com/jgunthorpe/linux
        git fetch --no-tags jgunthorpe vfio_iommufd
        git checkout 1e7593dc23967efedd0530c97e2ccfe0892ebba8
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

   In file included from include/linux/container_of.h:5,
                    from include/linux/list.h:5,
                    from include/linux/preempt.h:11,
                    from include/linux/spinlock.h:55,
                    from include/linux/mmzone.h:8,
                    from include/linux/gfp.h:7,
                    from include/linux/slab.h:15,
                    from drivers/iommu/iommufd/selftest.c:6:
>> drivers/iommu/iommufd/selftest.c:651:36: warning: comparison between 'enum <anonymous>' and 'enum <anonymous>' [-Wenum-compare]
     651 | static_assert(MOCK_ACCESS_RW_WRITE == IOMMUFD_ACCESS_RW_WRITE);
         |                                    ^~
   include/linux/build_bug.h:78:56: note: in definition of macro '__static_assert'
      78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
         |                                                        ^~~~
   drivers/iommu/iommufd/selftest.c:651:1: note: in expansion of macro 'static_assert'
     651 | static_assert(MOCK_ACCESS_RW_WRITE == IOMMUFD_ACCESS_RW_WRITE);
         | ^~~~~~~~~~~~~
   drivers/iommu/iommufd/selftest.c:652:40: warning: comparison between 'enum <anonymous>' and 'enum <anonymous>' [-Wenum-compare]
     652 | static_assert(MOCK_ACCESS_RW_SLOW_PATH == __IOMMUFD_ACCESS_RW_SLOW_PATH);
         |                                        ^~
   include/linux/build_bug.h:78:56: note: in definition of macro '__static_assert'
      78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
         |                                                        ^~~~
   drivers/iommu/iommufd/selftest.c:652:1: note: in expansion of macro 'static_assert'
     652 | static_assert(MOCK_ACCESS_RW_SLOW_PATH == __IOMMUFD_ACCESS_RW_SLOW_PATH);
         | ^~~~~~~~~~~~~


vim +651 drivers/iommu/iommufd/selftest.c

   608	
   609	static int iommufd_test_access_rw(struct iommufd_ucmd *ucmd,
   610					  unsigned int access_id, unsigned long iova,
   611					  size_t length, void __user *ubuf,
   612					  unsigned int flags)
   613	{
   614		struct selftest_access *staccess;
   615		void *tmp;
   616		int rc;
   617	
   618		staccess = iommufd_access_get(access_id);
   619		if (IS_ERR(staccess))
   620			return PTR_ERR(staccess);
   621	
   622		tmp = kvzalloc(length, GFP_KERNEL_ACCOUNT);
   623		if (!tmp) {
   624			rc = -ENOMEM;
   625			goto out_put;
   626		}
   627	
   628		if (flags & MOCK_ACCESS_RW_WRITE) {
   629			if (copy_from_user(tmp, ubuf, length)) {
   630				rc = -EFAULT;
   631				goto out_free;
   632			}
   633		}
   634	
   635		rc = iommufd_access_rw(staccess->access, iova, tmp, length, flags);
   636		if (rc)
   637			goto out_free;
   638		if (!(flags & MOCK_ACCESS_RW_WRITE)) {
   639			if (copy_to_user(ubuf, tmp, length)) {
   640				rc = -EFAULT;
   641				goto out_free;
   642			}
   643		}
   644	
   645	out_free:
   646		kvfree(tmp);
   647	out_put:
   648		fput(staccess->file);
   649		return rc;
   650	}
 > 651	static_assert(MOCK_ACCESS_RW_WRITE == IOMMUFD_ACCESS_RW_WRITE);
   652	static_assert(MOCK_ACCESS_RW_SLOW_PATH == __IOMMUFD_ACCESS_RW_SLOW_PATH);
   653	

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

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