Hi Greentime, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on linus/master] [also build test WARNING on v4.16-rc1 next-20180216] [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/Greentime-Hu/Andes-nds32-Linux-Kernel-Port/20180216-155013 config: cris-etrax-100lx_v2_defconfig (attached as .config) compiler: cris-linux-gcc (GCC) 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 make.cross ARCH=cris All warnings (new ones prefixed by >>): In file included from arch/cris/include/asm/io.h:24:0, from include/linux/io.h:25, from arch/cris/mm/ioremap.c:14: include/asm-generic/io.h:864:15: error: conflicting types for 'ioremap' void __iomem *ioremap(phys_addr_t phys_addr, size_t size); ^~~~~~~ In file included from include/linux/io.h:25:0, from arch/cris/mm/ioremap.c:14: arch/cris/include/asm/io.h:15:30: note: previous definition of 'ioremap' was here static inline void __iomem * ioremap (unsigned long offset, unsigned long size) ^~~~~~~ In file included from arch/cris/include/asm/io.h:24:0, from include/linux/io.h:25, from arch/cris/mm/ioremap.c:14: include/asm-generic/io.h:865:25: error: conflicting types for 'ioremap_nocache' #define ioremap_nocache ioremap_nocache ^ include/asm-generic/io.h:866:29: note: in expansion of macro 'ioremap_nocache' static inline void __iomem *ioremap_nocache(phys_addr_t offset, size_t size) ^~~~~~~~~~~~~~~ In file included from include/linux/io.h:25:0, from arch/cris/mm/ioremap.c:14: arch/cris/include/asm/io.h:22:23: note: previous declaration of 'ioremap_nocache' was here extern void __iomem * ioremap_nocache(unsigned long offset, unsigned long size); ^~~~~~~~~~~~~~~ In file included from arch/cris/include/asm/io.h:24:0, from include/linux/io.h:25, from arch/cris/mm/ioremap.c:14: include/asm-generic/io.h:865:25: error: conflicting types for 'ioremap_nocache' #define ioremap_nocache ioremap_nocache ^ >> arch/cris/mm/ioremap.c:80:15: note: in expansion of macro 'ioremap_nocache' void __iomem *ioremap_nocache(unsigned long phys_addr, unsigned long size) ^~~~~~~~~~~~~~~ include/asm-generic/io.h:865:25: note: previous definition of 'ioremap_nocache' was here #define ioremap_nocache ioremap_nocache ^ include/asm-generic/io.h:866:29: note: in expansion of macro 'ioremap_nocache' static inline void __iomem *ioremap_nocache(phys_addr_t offset, size_t size) ^~~~~~~~~~~~~~~ vim +/ioremap_nocache +80 arch/cris/mm/ioremap.c e32cbc3d Haavard Skinnemoen 2006-09-30 @14 #include <linux/io.h> ^1da177e Linus Torvalds 2005-04-16 15 #include <asm/pgalloc.h> 556dcee7 Jesper Nilsson 2008-10-21 16 #include <arch/memmap.h> ^1da177e Linus Torvalds 2005-04-16 17 ^1da177e Linus Torvalds 2005-04-16 18 /* ^1da177e Linus Torvalds 2005-04-16 19 * Generic mapping function (not visible outside): ^1da177e Linus Torvalds 2005-04-16 20 */ ^1da177e Linus Torvalds 2005-04-16 21 ^1da177e Linus Torvalds 2005-04-16 22 /* ^1da177e Linus Torvalds 2005-04-16 23 * Remap an arbitrary physical address space into the kernel virtual ^1da177e Linus Torvalds 2005-04-16 24 * address space. Needed when the kernel wants to access high addresses ^1da177e Linus Torvalds 2005-04-16 25 * directly. ^1da177e Linus Torvalds 2005-04-16 26 * ^1da177e Linus Torvalds 2005-04-16 27 * NOTE! We need to allow non-page-aligned mappings too: we will obviously ^1da177e Linus Torvalds 2005-04-16 28 * have to convert them into an offset in a page-aligned mapping, but the ^1da177e Linus Torvalds 2005-04-16 29 * caller shouldn't need to know that small detail. ^1da177e Linus Torvalds 2005-04-16 30 */ 4f18cfbf Mikael Starvik 2005-07-27 31 void __iomem * __ioremap_prot(unsigned long phys_addr, unsigned long size, pgprot_t prot) ^1da177e Linus Torvalds 2005-04-16 32 { 4f18cfbf Mikael Starvik 2005-07-27 33 void __iomem * addr; ^1da177e Linus Torvalds 2005-04-16 34 struct vm_struct * area; ^1da177e Linus Torvalds 2005-04-16 35 unsigned long offset, last_addr; ^1da177e Linus Torvalds 2005-04-16 36 ^1da177e Linus Torvalds 2005-04-16 37 /* Don't allow wraparound or zero size */ ^1da177e Linus Torvalds 2005-04-16 38 last_addr = phys_addr + size - 1; ^1da177e Linus Torvalds 2005-04-16 39 if (!size || last_addr < phys_addr) ^1da177e Linus Torvalds 2005-04-16 40 return NULL; ^1da177e Linus Torvalds 2005-04-16 41 ^1da177e Linus Torvalds 2005-04-16 42 /* ^1da177e Linus Torvalds 2005-04-16 43 * Mappings have to be page-aligned ^1da177e Linus Torvalds 2005-04-16 44 */ ^1da177e Linus Torvalds 2005-04-16 45 offset = phys_addr & ~PAGE_MASK; ^1da177e Linus Torvalds 2005-04-16 46 phys_addr &= PAGE_MASK; ^1da177e Linus Torvalds 2005-04-16 47 size = PAGE_ALIGN(last_addr+1) - phys_addr; ^1da177e Linus Torvalds 2005-04-16 48 ^1da177e Linus Torvalds 2005-04-16 49 /* ^1da177e Linus Torvalds 2005-04-16 50 * Ok, go for it.. ^1da177e Linus Torvalds 2005-04-16 51 */ ^1da177e Linus Torvalds 2005-04-16 52 area = get_vm_area(size, VM_IOREMAP); ^1da177e Linus Torvalds 2005-04-16 53 if (!area) ^1da177e Linus Torvalds 2005-04-16 54 return NULL; 4f18cfbf Mikael Starvik 2005-07-27 55 addr = (void __iomem *)area->addr; e32cbc3d Haavard Skinnemoen 2006-09-30 56 if (ioremap_page_range((unsigned long)addr, (unsigned long)addr + size, e32cbc3d Haavard Skinnemoen 2006-09-30 57 phys_addr, prot)) { 4f18cfbf Mikael Starvik 2005-07-27 58 vfree((void __force *)addr); ^1da177e Linus Torvalds 2005-04-16 59 return NULL; ^1da177e Linus Torvalds 2005-04-16 60 } 4f18cfbf Mikael Starvik 2005-07-27 61 return (void __iomem *) (offset + (char __iomem *)addr); 4f18cfbf Mikael Starvik 2005-07-27 62 } 4f18cfbf Mikael Starvik 2005-07-27 63 4f18cfbf Mikael Starvik 2005-07-27 64 void __iomem * __ioremap(unsigned long phys_addr, unsigned long size, unsigned long flags) 4f18cfbf Mikael Starvik 2005-07-27 65 { 4f18cfbf Mikael Starvik 2005-07-27 66 return __ioremap_prot(phys_addr, size, 4f18cfbf Mikael Starvik 2005-07-27 67 __pgprot(_PAGE_PRESENT | __READABLE | 4f18cfbf Mikael Starvik 2005-07-27 68 __WRITEABLE | _PAGE_GLOBAL | 4f18cfbf Mikael Starvik 2005-07-27 69 _PAGE_KERNEL | flags)); 4f18cfbf Mikael Starvik 2005-07-27 70 } 4f18cfbf Mikael Starvik 2005-07-27 71 4f18cfbf Mikael Starvik 2005-07-27 72 /** 4f18cfbf Mikael Starvik 2005-07-27 73 * ioremap_nocache - map bus memory into CPU space 4f18cfbf Mikael Starvik 2005-07-27 74 * @offset: bus address of the memory 4f18cfbf Mikael Starvik 2005-07-27 75 * @size: size of the resource to map 4f18cfbf Mikael Starvik 2005-07-27 76 * 4f18cfbf Mikael Starvik 2005-07-27 77 * Must be freed with iounmap. 4f18cfbf Mikael Starvik 2005-07-27 78 */ 4f18cfbf Mikael Starvik 2005-07-27 79 4f18cfbf Mikael Starvik 2005-07-27 @80 void __iomem *ioremap_nocache(unsigned long phys_addr, unsigned long size) 4f18cfbf Mikael Starvik 2005-07-27 81 { 4f18cfbf Mikael Starvik 2005-07-27 82 return __ioremap(phys_addr | MEM_NON_CACHEABLE, size, 0); ^1da177e Linus Torvalds 2005-04-16 83 } 82e6df1e Jesper Nilsson 2014-10-01 84 EXPORT_SYMBOL(ioremap_nocache); ^1da177e Linus Torvalds 2005-04-16 85 :::::: The code at line 80 was first introduced by commit :::::: 4f18cfbf0990bfc2e8e7706eeb9e5bef898ae923 [PATCH] CRIS update: mm :::::: TO: Mikael Starvik <mikael.starvik@xxxxxxxx> :::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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