[kbuild-all] Re: [linux-next:master 9419/10007] drivers/mtd/nand/raw/arasan-nand-controller.c:1453:33: warning: shift count >= width of type

Hello, kernel test robot <lkp(a)intel.com&gt; wrote on Wed, 16 Jun 2021 18:33:22 +0800: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master > head: 19ae1f2bd9c091059f80646604ccef8a1e614f57 > commit: 236fd3e0427070413e7059dc3c52c3f9c89f7cc0 [9419/10007] Merge remote-tracking branch 'nand/nand/next' > config: riscv-randconfig-r013-20210615 (attached as .config) > compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 64720f57bea6a6bf033feef4a5751ab9c0c3b401) > 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 > # install riscv cross compiling tool for clang build > # apt-get install binutils-riscv64-linux-gnu > # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commi... > git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git > git fetch --no-tags linux-next master > git checkout 236fd3e0427070413e7059dc3c52c3f9c89f7cc0 > # save the attached .config to linux build tree > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <lkp(a)intel.com&gt; > > All warnings (new ones prefixed by >>): > > In file included from drivers/mtd/nand/raw/arasan-nand-controller.c:17: > In file included from include/linux/dma-mapping.h:10: > In file included from include/linux/scatterlist.h:8: > In file included from include/linux/mm.h:33: > In file included from include/linux/pgtable.h:6: > arch/riscv/include/asm/pgtable.h:521:9: error: implicit declaration of function 'pfn_pmd' [-Werror,-Wimplicit-function-declaration] > return pfn_pmd(page_to_pfn(page), prot); > ^ > arch/riscv/include/asm/pgtable.h:521:9: note: did you mean 'pfn_pgd'? > arch/riscv/include/asm/pgtable.h:222:21: note: 'pfn_pgd' declared here > static inline pgd_t pfn_pgd(unsigned long pfn, pgprot_t prot) > ^ > arch/riscv/include/asm/pgtable.h:521:17: error: implicit declaration of function 'page_to_section' [-Werror,-Wimplicit-function-declaration] > return pfn_pmd(page_to_pfn(page), prot); > ^ > include/asm-generic/memory_model.h:81:21: note: expanded from macro 'page_to_pfn' > #define page_to_pfn __page_to_pfn > ^ > include/asm-generic/memory_model.h:64:14: note: expanded from macro '__page_to_pfn' > int __sec = page_to_section(__pg); \ > ^ > arch/riscv/include/asm/pgtable.h:521:17: note: did you mean '__nr_to_section'? > include/asm-generic/memory_model.h:81:21: note: expanded from macro 'page_to_pfn' > #define page_to_pfn __page_to_pfn > ^ > include/asm-generic/memory_model.h:64:14: note: expanded from macro '__page_to_pfn' > int __sec = page_to_section(__pg); \ > ^ > include/linux/mmzone.h:1314:35: note: '__nr_to_section' declared here > static inline struct mem_section *__nr_to_section(unsigned long nr) > ^ > In file included from drivers/mtd/nand/raw/arasan-nand-controller.c:17: > In file included from include/linux/dma-mapping.h:10: > In file included from include/linux/scatterlist.h:8: > In file included from include/linux/mm.h:33: > In file included from include/linux/pgtable.h:6: > arch/riscv/include/asm/pgtable.h:521:9: error: returning 'int' from a function with incompatible result type 'pmd_t' > return pfn_pmd(page_to_pfn(page), prot); > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > In file included from drivers/mtd/nand/raw/arasan-nand-controller.c:17: > In file included from include/linux/dma-mapping.h:10: > In file included from include/linux/scatterlist.h:8: > include/linux/mm.h:1552:29: error: static declaration of 'page_to_section' follows non-static declaration > static inline unsigned long page_to_section(const struct page *page) > ^ > arch/riscv/include/asm/pgtable.h:521:17: note: previous implicit declaration is here > return pfn_pmd(page_to_pfn(page), prot); > ^ > include/asm-generic/memory_model.h:81:21: note: expanded from macro 'page_to_pfn' > #define page_to_pfn __page_to_pfn > ^ > include/asm-generic/memory_model.h:64:14: note: expanded from macro '__page_to_pfn' > int __sec = page_to_section(__pg); \ > ^ >>> drivers/mtd/nand/raw/arasan-nand-controller.c:1453:33: warning: shift count >= width of type [-Wshift-count-overflow] > ret = dma_set_mask(&pdev->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)) > ^ ~~~ > 1 warning and 4 errors generated. I'm not sure to understand what the proper fix here. I am also unable to reproduce the warning with the above steps.