Hi Alistair,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on kselftest/next]
[also build test ERROR on linus/master v5.11 next-20210218]
[cannot apply to hnaz-linux-mm/master]
[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/20210219-100858
base:   https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git next
config: mips-randconfig-r036-20210218 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c9439ca36342fb6013187d0a69aef92736951476)
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
        # install mips cross compiling tool for clang build
        # apt-get install binutils-mips-linux-gnu
        # https://github.com/0day-ci/linux/commit/bb5444811772d30b2e3bbaa44baeb8a4b3f03cec
        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/20210219-100858
        git checkout bb5444811772d30b2e3bbaa44baeb8a4b3f03cec
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=mips 

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

All error/warnings (new ones prefixed by >>):

>> fs/proc/task_mmu.c:521:12: error: implicit declaration of function 'is_device_exclusive_entry' [-Werror,-Wimplicit-function-declaration]
                   else if (is_device_exclusive_entry(swpent))
                            ^
   fs/proc/task_mmu.c:521:12: note: did you mean 'is_device_private_entry'?
   include/linux/swapops.h:176:20: note: 'is_device_private_entry' declared here
   static inline bool is_device_private_entry(swp_entry_t entry)
                      ^
>> fs/proc/task_mmu.c:522:11: error: implicit declaration of function 'device_exclusive_entry_to_page' [-Werror,-Wimplicit-function-declaration]
                           page = device_exclusive_entry_to_page(swpent);
                                  ^
   fs/proc/task_mmu.c:522:11: note: did you mean 'device_private_entry_to_page'?
   include/linux/swapops.h:191:28: note: 'device_private_entry_to_page' declared here
   static inline struct page *device_private_entry_to_page(swp_entry_t entry)
                              ^
>> fs/proc/task_mmu.c:522:9: warning: incompatible integer to pointer conversion assigning to 'struct page *' from 'int' [-Wint-conversion]
                           page = device_exclusive_entry_to_page(swpent);
                                ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   fs/proc/task_mmu.c:1395:7: error: implicit declaration of function 'is_device_exclusive_entry' [-Werror,-Wimplicit-function-declaration]
                   if (is_device_exclusive_entry(entry))
                       ^
   fs/proc/task_mmu.c:1396:11: error: implicit declaration of function 'device_exclusive_entry_to_page' [-Werror,-Wimplicit-function-declaration]
                           page = device_exclusive_entry_to_page(entry);
                                  ^
   fs/proc/task_mmu.c:1396:9: warning: incompatible integer to pointer conversion assigning to 'struct page *' from 'int' [-Wint-conversion]
                           page = device_exclusive_entry_to_page(entry);
                                ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   2 warnings and 4 errors generated.


vim +/is_device_exclusive_entry +521 fs/proc/task_mmu.c

   490	
   491	static void smaps_pte_entry(pte_t *pte, unsigned long addr,
   492			struct mm_walk *walk)
   493	{
   494		struct mem_size_stats *mss = walk->private;
   495		struct vm_area_struct *vma = walk->vma;
   496		bool locked = !!(vma->vm_flags & VM_LOCKED);
   497		struct page *page = NULL;
   498	
   499		if (pte_present(*pte)) {
   500			page = vm_normal_page(vma, addr, *pte);
   501		} else if (is_swap_pte(*pte)) {
   502			swp_entry_t swpent = pte_to_swp_entry(*pte);
   503	
   504			if (!non_swap_entry(swpent)) {
   505				int mapcount;
   506	
   507				mss->swap += PAGE_SIZE;
   508				mapcount = swp_swapcount(swpent);
   509				if (mapcount >= 2) {
   510					u64 pss_delta = (u64)PAGE_SIZE << PSS_SHIFT;
   511	
   512					do_div(pss_delta, mapcount);
   513					mss->swap_pss += pss_delta;
   514				} else {
   515					mss->swap_pss += (u64)PAGE_SIZE << PSS_SHIFT;
   516				}
   517			} else if (is_migration_entry(swpent))
   518				page = migration_entry_to_page(swpent);
   519			else if (is_device_private_entry(swpent))
   520				page = device_private_entry_to_page(swpent);
 > 521			else if (is_device_exclusive_entry(swpent))
 > 522				page = device_exclusive_entry_to_page(swpent);
   523		} else if (unlikely(IS_ENABLED(CONFIG_SHMEM) && mss->check_shmem_swap
   524								&& pte_none(*pte))) {
   525			page = xa_load(&vma->vm_file->f_mapping->i_pages,
   526							linear_page_index(vma, addr));
   527			if (xa_is_value(page))
   528				mss->swap += PAGE_SIZE;
   529			return;
   530		}
   531	
   532		if (!page)
   533			return;
   534	
   535		smaps_account(mss, page, false, pte_young(*pte), pte_dirty(*pte), locked);
   536	}
   537	

---
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