tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 4b48fa45408a2757255bdd0c640c1f693b424fe4 commit: 0305a09f222b7b94b01e478948f09ef95e9afda2 [3482/3482] zcopy: Introduce the pageattach interface config: arm64-randconfig-r111-20251206 (https://download.01.org/0day-ci/archive/20251208/202512080059.AtMf7DsU-lkp@i...) compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251208/202512080059.AtMf7DsU-lkp@i...) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202512080059.AtMf7DsU-lkp@intel.com/ sparse warnings: (new ones prefixed by >>)

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drivers/misc/zcopy/zcopy.c:621:51: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void const [noderef] __user *from @@ got void * @@ drivers/misc/zcopy/zcopy.c:621:51: sparse: expected void const [noderef] __user *from drivers/misc/zcopy/zcopy.c:621:51: sparse: got void *

vim +621 drivers/misc/zcopy/zcopy.c 611 612 static long zcopy_ioctl(struct file *file, unsigned int type, unsigned long ptr) 613 { 614 long ret = 0; 615 616 switch (type) { 617 case IO_ATTACH: 618 { 619 struct zcopy_ioctl_pswap ctx; 620

621 if (copy_from_user((void *)&ctx, (void *)ptr, 622 sizeof(struct zcopy_ioctl_pswap))) { 623 ret = -EFAULT; 624 break; 625 } 626 ret = attach_pages(ctx.dst_addr, ctx.src_addr, ctx.dst_pid, 627 ctx.src_pid, ctx.size); 628 break; 629 } 630 default: 631 break; 632 } 633 634 return ret; 635 } 636

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