Hi Andrzej, I love your patch! Yet something to improve: [auto build test ERROR on balbi-usb/next] [also build test ERROR on v4.20-rc1 next-20181109] [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/Andrzej-Pietrasiewicz/usb-gadget-f_fs-Allow-scatter-gather-buffers/20181109-194916 base: https://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git next config: sparc64-allyesconfig (attached as .config) compiler: sparc64-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=7.2.0 make.cross ARCH=sparc64 All error/warnings (new ones prefixed by >>): drivers/usb/gadget/function/f_fs.c: In function 'ffs_build_sg_list': >> drivers/usb/gadget/function/f_fs.c:769:10: error: implicit declaration of function 'vmalloc'; did you mean 'kvmalloc'? [-Werror=implicit-function-declaration] vaddr = vmalloc(size); ^~~~~~~ kvmalloc >> drivers/usb/gadget/function/f_fs.c:769:8: warning: assignment makes pointer from integer without a cast [-Wint-conversion] vaddr = vmalloc(size); ^ >> drivers/usb/gadget/function/f_fs.c:778:3: error: implicit declaration of function 'vfree'; did you mean 'kvfree'? [-Werror=implicit-function-declaration] vfree(vaddr); ^~~~~ kvfree cc1: some warnings being treated as errors vim +769 drivers/usb/gadget/function/f_fs.c 755 756 /* 757 * allocate a virtually contiguous buffer and create a scatterlist describing it 758 * @sg_table - pointer to a place to be filled with sg_table contents 759 * @size - required buffer size 760 */ 761 static void *ffs_build_sg_list(struct sg_table *sg_table, size_t size) 762 { 763 struct page **pages; 764 void *vaddr; 765 unsigned long ptr; 766 unsigned int n_pages; 767 int i; 768 > 769 vaddr = vmalloc(size); 770 if (!vaddr) 771 return NULL; 772 773 n_pages = (PAGE_ALIGN((unsigned long)vaddr + size) - 774 ((unsigned long)vaddr & PAGE_MASK)) 775 >> PAGE_SHIFT; 776 pages = kvmalloc_array(n_pages, sizeof(struct page *), GFP_KERNEL); 777 if (!pages) { > 778 vfree(vaddr); 779 780 return NULL; 781 } 782 for (i = 0, ptr = (unsigned long)vaddr & PAGE_MASK; i < n_pages; 783 ++i, ptr += PAGE_SIZE) 784 pages[i] = vmalloc_to_page((void *)ptr); 785 786 if (sg_alloc_table_from_pages(sg_table, pages, n_pages, 787 ((unsigned long)vaddr) & ~PAGE_MASK, size, GFP_KERNEL)) { 788 kvfree(pages); 789 vfree(vaddr); 790 791 return NULL; 792 } 793 kvfree(pages); 794 795 return vaddr; 796 } 797 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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