Hi Xie, Thank you for the patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on v5.19-rc5 next-20220707] [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/Xie-Yongji/VDUSE-Support-registering-userspace-memory-as-bounce-buffer/20220706-130802 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git e35e5b6f695d241ffb1d223207da58a1fbcdff4b config: hexagon-randconfig-r005-20220707 (https://download.01.org/0day-ci/archive/20220708/202207080640.p8q3NqHB-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 66ae1d60bb278793fd651cece264699d522bab84) 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/intel-lab-lkp/linux/commit/9be699264e4fede9c3be913b2d1003c260d9fa05 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Xie-Yongji/VDUSE-Support-registering-userspace-memory-as-bounce-buffer/20220706-130802 git checkout 9be699264e4fede9c3be913b2d1003c260d9fa05 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/vdpa/vdpa_user/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All error/warnings (new ones prefixed by >>): >> drivers/vdpa/vdpa_user/vduse_dev.c:949:2: error: call to undeclared function 'vfree'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] vfree(dev->iotlb_mem->pages); ^ >> drivers/vdpa/vdpa_user/vduse_dev.c:978:14: error: call to undeclared function '__vmalloc'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] page_list = __vmalloc(array_size(npages, sizeof(struct page *)), ^ drivers/vdpa/vdpa_user/vduse_dev.c:978:14: note: did you mean '__kmalloc'? include/linux/slab.h:434:7: note: '__kmalloc' declared here void *__kmalloc(size_t size, gfp_t flags) __assume_kmalloc_alignment __alloc_size(1); ^ >> drivers/vdpa/vdpa_user/vduse_dev.c:978:12: warning: incompatible integer to pointer conversion assigning to 'struct page **' from 'int' [-Wint-conversion] page_list = __vmalloc(array_size(npages, sizeof(struct page *)), ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/vdpa/vdpa_user/vduse_dev.c:1018:3: error: call to undeclared function 'vfree'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] vfree(page_list); ^ drivers/vdpa/vdpa_user/vduse_dev.c:1654:51: warning: shift count >= width of type [-Wshift-count-overflow] ret = dma_set_mask_and_coherent(&vdev->vdpa.dev, DMA_BIT_MASK(64)); ^~~~~~~~~~~~~~~~ include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK' #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1)) ^ ~~~ 2 warnings and 3 errors generated. vim +/vfree +949 drivers/vdpa/vdpa_user/vduse_dev.c 929 930 static int vduse_dev_dereg_iotlb_mem(struct vduse_dev *dev, 931 u64 iova, u64 size) 932 { 933 int ret; 934 935 mutex_lock(&dev->mem_lock); 936 ret = -ENOENT; 937 if (!dev->iotlb_mem) 938 goto unlock; 939 940 ret = -EINVAL; 941 if (dev->iotlb_mem->iova != iova || size != dev->domain->bounce_size) 942 goto unlock; 943 944 vduse_domain_remove_user_bounce_pages(dev->domain); 945 unpin_user_pages_dirty_lock(dev->iotlb_mem->pages, 946 dev->iotlb_mem->npages, true); 947 atomic64_sub(dev->iotlb_mem->npages, &dev->iotlb_mem->mm->pinned_vm); 948 mmdrop(dev->iotlb_mem->mm); > 949 vfree(dev->iotlb_mem->pages); 950 kfree(dev->iotlb_mem); 951 dev->iotlb_mem = NULL; 952 ret = 0; 953 unlock: 954 mutex_unlock(&dev->mem_lock); 955 return ret; 956 } 957 958 static int vduse_dev_reg_iotlb_mem(struct vduse_dev *dev, 959 u64 iova, u64 uaddr, u64 size) 960 { 961 struct page **page_list = NULL; 962 struct vduse_iotlb_mem *mem = NULL; 963 long pinned = 0; 964 unsigned long npages, lock_limit; 965 int ret; 966 967 if (size != dev->domain->bounce_size || 968 iova != 0 || uaddr & ~PAGE_MASK) 969 return -EINVAL; 970 971 mutex_lock(&dev->mem_lock); 972 ret = -EEXIST; 973 if (dev->iotlb_mem) 974 goto unlock; 975 976 ret = -ENOMEM; 977 npages = size >> PAGE_SHIFT; > 978 page_list = __vmalloc(array_size(npages, sizeof(struct page *)), 979 GFP_KERNEL_ACCOUNT); 980 mem = kzalloc(sizeof(*mem), GFP_KERNEL); 981 if (!page_list || !mem) 982 goto unlock; 983 984 mmap_read_lock(current->mm); 985 986 lock_limit = PFN_DOWN(rlimit(RLIMIT_MEMLOCK)); 987 if (npages + atomic64_read(¤t->mm->pinned_vm) > lock_limit) 988 goto out; 989 990 pinned = pin_user_pages(uaddr, npages, FOLL_LONGTERM | FOLL_WRITE, 991 page_list, NULL); 992 if (pinned != npages) { 993 ret = pinned < 0 ? pinned : -ENOMEM; 994 goto out; 995 } 996 997 ret = vduse_domain_add_user_bounce_pages(dev->domain, 998 page_list, pinned); 999 if (ret) 1000 goto out; 1001 1002 atomic64_add(npages, ¤t->mm->pinned_vm); 1003 1004 mem->pages = page_list; 1005 mem->npages = pinned; 1006 mem->iova = iova; 1007 mem->mm = current->mm; 1008 mmgrab(current->mm); 1009 1010 dev->iotlb_mem = mem; 1011 out: 1012 if (ret && pinned > 0) 1013 unpin_user_pages(page_list, pinned); 1014 1015 mmap_read_unlock(current->mm); 1016 unlock: 1017 if (ret) { 1018 vfree(page_list); 1019 kfree(mem); 1020 } 1021 mutex_unlock(&dev->mem_lock); 1022 return ret; 1023 } 1024 -- 0-DAY CI Kernel Test Service https://01.org/lkp _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
