Hi Dmitry, [auto build test WARNING on linus/master] [also build test WARNING on v4.11-rc6 next-20170413] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Dmitry-Safonov/ARM32-Support-mremap-for-sigpage-vDSO/20170414-190018 config: arm-sunxi_defconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (Debian 6.1.1-9) 6.1.1 20160705 reproduce: wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=arm All warnings (new ones prefixed by >>): arch/arm/kernel/vdso.c: In function 'vdso_mremap': >> arch/arm/kernel/vdso.c:69:28: warning: assignment makes integer from pointer >> without a cast [-Wint-conversion] current->mm->context.vdso = (void __user *)new_vma->vm_start; ^ vim +69 arch/arm/kernel/vdso.c 53 .name = "[vvar]", 54 .pages = &vdso_data_page, 55 }; 56 57 static int vdso_mremap(const struct vm_special_mapping *sm, 58 struct vm_area_struct *new_vma) 59 { 60 unsigned long new_size = new_vma->vm_end - new_vma->vm_start; 61 unsigned long vdso_size; 62 63 /* without VVAR page */ 64 vdso_size = (vdso_total_pages - 1) << PAGE_SHIFT; 65 66 if (vdso_size != new_size) 67 return -EINVAL; 68 > 69 current->mm->context.vdso = (void __user *)new_vma->vm_start; 70 71 return 0; 72 } 73 74 static struct vm_special_mapping vdso_text_mapping __ro_after_init = { 75 .name = "[vdso]", 76 .mremap = vdso_mremap, 77 }; --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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