Re: [PATCH v5 5/8] mm: Device exclusive memory access

[kernel test robot]

Hi Alistair,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on s390/features]
[also build test ERROR on linus/master v5.12-rc2 next-20210309]
[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/Alistair-Popple/Add-support-for-SVM-atomics-in-Nouveau/20210310-064003
base:   https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git features
config: arm64-allyesconfig (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.3.0
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/0day-ci/linux/commit/f16159aa0e930d32501682bca18bd840f4afd7f1
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Alistair-Popple/Add-support-for-SVM-atomics-in-Nouveau/20210310-064003
        git checkout f16159aa0e930d32501682bca18bd840f4afd7f1
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64 

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

Note: the linux-review/Alistair-Popple/Add-support-for-SVM-atomics-in-Nouveau/20210310-064003 HEAD 1c7d3a45d0693d661c4d9fbd8d25745b1db4fcbb builds fine.
      It only hurts bisectibility.

All errors (new ones prefixed by >>):

   drivers/gpu/drm/nouveau/nouveau_svm.c: In function 'nouveau_svmm_invalidate_range_start':
>> drivers/gpu/drm/nouveau/nouveau_svm.c:268:12: error: 'const struct mmu_notifier_range' has no member named 'migrate_pgmap_owner'
     268 |      update->migrate_pgmap_owner == svmm->vmm->cli->drm->dev)
         |            ^~
   drivers/gpu/drm/nouveau/nouveau_svm.c: In function 'nouveau_pfns_map':
   drivers/gpu/drm/nouveau/nouveau_svm.c:814:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
     814 |  int ret;
         |      ^~~


vim +268 drivers/gpu/drm/nouveau/nouveau_svm.c

eeaf06ac1a5584 Ben Skeggs      2018-07-05  244  
eeaf06ac1a5584 Ben Skeggs      2018-07-05  245  static int
c625c274ee0058 Jason Gunthorpe 2019-11-12  246  nouveau_svmm_invalidate_range_start(struct mmu_notifier *mn,
1f961807925032 Ralph Campbell  2019-07-25  247  				    const struct mmu_notifier_range *update)
eeaf06ac1a5584 Ben Skeggs      2018-07-05  248  {
c625c274ee0058 Jason Gunthorpe 2019-11-12  249  	struct nouveau_svmm *svmm =
c625c274ee0058 Jason Gunthorpe 2019-11-12  250  		container_of(mn, struct nouveau_svmm, notifier);
eeaf06ac1a5584 Ben Skeggs      2018-07-05  251  	unsigned long start = update->start;
eeaf06ac1a5584 Ben Skeggs      2018-07-05  252  	unsigned long limit = update->end;
eeaf06ac1a5584 Ben Skeggs      2018-07-05  253  
1f961807925032 Ralph Campbell  2019-07-25  254  	if (!mmu_notifier_range_blockable(update))
eeaf06ac1a5584 Ben Skeggs      2018-07-05  255  		return -EAGAIN;
eeaf06ac1a5584 Ben Skeggs      2018-07-05  256  
eeaf06ac1a5584 Ben Skeggs      2018-07-05  257  	SVMM_DBG(svmm, "invalidate %016lx-%016lx", start, limit);
eeaf06ac1a5584 Ben Skeggs      2018-07-05  258  
eeaf06ac1a5584 Ben Skeggs      2018-07-05  259  	mutex_lock(&svmm->mutex);
c625c274ee0058 Jason Gunthorpe 2019-11-12  260  	if (unlikely(!svmm->vmm))
c625c274ee0058 Jason Gunthorpe 2019-11-12  261  		goto out;
c625c274ee0058 Jason Gunthorpe 2019-11-12  262  
f8477ce6b5923e Ralph Campbell  2020-07-23  263  	/*
f8477ce6b5923e Ralph Campbell  2020-07-23  264  	 * Ignore invalidation callbacks for device private pages since
f8477ce6b5923e Ralph Campbell  2020-07-23  265  	 * the invalidation is handled as part of the migration process.
f8477ce6b5923e Ralph Campbell  2020-07-23  266  	 */
f8477ce6b5923e Ralph Campbell  2020-07-23  267  	if (update->event == MMU_NOTIFY_MIGRATE &&
f8477ce6b5923e Ralph Campbell  2020-07-23 @268  	    update->migrate_pgmap_owner == svmm->vmm->cli->drm->dev)
f8477ce6b5923e Ralph Campbell  2020-07-23  269  		goto out;
f8477ce6b5923e Ralph Campbell  2020-07-23  270  
eeaf06ac1a5584 Ben Skeggs      2018-07-05  271  	if (limit > svmm->unmanaged.start && start < svmm->unmanaged.limit) {
eeaf06ac1a5584 Ben Skeggs      2018-07-05  272  		if (start < svmm->unmanaged.start) {
eeaf06ac1a5584 Ben Skeggs      2018-07-05  273  			nouveau_svmm_invalidate(svmm, start,
eeaf06ac1a5584 Ben Skeggs      2018-07-05  274  						svmm->unmanaged.limit);
eeaf06ac1a5584 Ben Skeggs      2018-07-05  275  		}
eeaf06ac1a5584 Ben Skeggs      2018-07-05  276  		start = svmm->unmanaged.limit;
eeaf06ac1a5584 Ben Skeggs      2018-07-05  277  	}
eeaf06ac1a5584 Ben Skeggs      2018-07-05  278  
eeaf06ac1a5584 Ben Skeggs      2018-07-05  279  	nouveau_svmm_invalidate(svmm, start, limit);
c625c274ee0058 Jason Gunthorpe 2019-11-12  280  
c625c274ee0058 Jason Gunthorpe 2019-11-12  281  out:
eeaf06ac1a5584 Ben Skeggs      2018-07-05  282  	mutex_unlock(&svmm->mutex);
eeaf06ac1a5584 Ben Skeggs      2018-07-05  283  	return 0;
eeaf06ac1a5584 Ben Skeggs      2018-07-05  284  }
eeaf06ac1a5584 Ben Skeggs      2018-07-05  285  

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