Hi Lorenz, kernel test robot noticed the following build warnings:
[auto build test WARNING on 38d976c32d85ef12dcd2b8a231196f7049548477] url: https://github.com/intel-lab-lkp/linux/commits/Lorenz-Bauer/btf-allow-mmap-of-vmlinux-btf/20250506-024103 base: 38d976c32d85ef12dcd2b8a231196f7049548477 patch link: https://lore.kernel.org/r/20250505-vmlinux-mmap-v3-1-5d53afa060e8%40isovalent.com patch subject: [PATCH bpf-next v3 1/3] btf: allow mmap of vmlinux btf config: arc-randconfig-r073-20250508 (https://download.01.org/0day-ci/archive/20250509/202505091116.jhtywjw4-...@intel.com/config) compiler: arc-linux-gcc (GCC) 12.4.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250509/202505091116.jhtywjw4-...@intel.com/reproduce) 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 <l...@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202505091116.jhtywjw4-...@intel.com/ All warnings (new ones prefixed by >>): In file included from arch/arc/include/asm/page.h:136, from arch/arc/include/asm/thread_info.h:16, from include/linux/thread_info.h:60, from include/asm-generic/preempt.h:5, from ./arch/arc/include/generated/asm/preempt.h:1, from include/linux/preempt.h:79, from include/linux/spinlock.h:56, from include/linux/mmzone.h:8, from include/linux/gfp.h:7, from include/linux/umh.h:4, from include/linux/kmod.h:9, from include/linux/module.h:17, from kernel/bpf/sysfs_btf.c:6: kernel/bpf/sysfs_btf.c: In function 'btf_sysfs_vmlinux_mmap': >> kernel/bpf/sysfs_btf.c:43:51: warning: passing argument 1 of 'virt_to_pfn' >> makes pointer from integer without a cast [-Wint-conversion] 43 | virt_to_page(addr)); | ^~~~ | | | long unsigned int include/asm-generic/memory_model.h:18:46: note: in definition of macro '__pfn_to_page' 18 | #define __pfn_to_page(pfn) (mem_map + ((pfn) - ARCH_PFN_OFFSET)) | ^~~ kernel/bpf/sysfs_btf.c:43:38: note: in expansion of macro 'virt_to_page' 43 | virt_to_page(addr)); | ^~~~~~~~~~~~ arch/arc/include/asm/page.h:123:53: note: expected 'const void *' but argument is of type 'long unsigned int' 123 | static inline unsigned long virt_to_pfn(const void *kaddr) | ~~~~~~~~~~~~^~~~~ vim +/virt_to_pfn +43 kernel/bpf/sysfs_btf.c 17 18 static int btf_sysfs_vmlinux_mmap(struct file *filp, struct kobject *kobj, 19 const struct bin_attribute *attr, 20 struct vm_area_struct *vma) 21 { 22 unsigned long pages = PAGE_ALIGN(attr->size) >> PAGE_SHIFT; 23 size_t vm_size = vma->vm_end - vma->vm_start; 24 unsigned long addr = (unsigned long)attr->private; 25 int i, err = 0; 26 27 if (addr != (unsigned long)__start_BTF || !PAGE_ALIGNED(addr)) 28 return -EINVAL; 29 30 if (vma->vm_pgoff) 31 return -EINVAL; 32 33 if (vma->vm_flags & (VM_WRITE | VM_EXEC | VM_MAYSHARE)) 34 return -EACCES; 35 36 if (vm_size >> PAGE_SHIFT > pages) 37 return -EINVAL; 38 39 vm_flags_mod(vma, VM_DONTDUMP, VM_MAYEXEC | VM_MAYWRITE); 40 41 for (i = 0; i < pages && !err; i++, addr += PAGE_SIZE) 42 err = vm_insert_page(vma, vma->vm_start + i * PAGE_SIZE, > 43 virt_to_page(addr)); 44 45 if (err) 46 zap_vma_pages(vma); 47 48 return err; 49 } 50 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
