tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-unstable head: e726c62e70a70ae5536caa0aa131c5dce5c6f764 commit: 827057ff3ce7554741d431145c3b93f1a54125fc [93/173] s390: mm: convert to GENERIC_IOREMAP config: s390-randconfig-r033-20230713 (https://download.01.org/0day-ci/archive/20230713/202307131033.JgvCSVz4-lkp@xxxxxxxxx/config) compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a) reproduce: (https://download.01.org/0day-ci/archive/20230713/202307131033.JgvCSVz4-lkp@xxxxxxxxx/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 <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202307131033.JgvCSVz4-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): In file included from drivers/clk/clk-fixed-mmio.c:13: In file included from include/linux/io.h:13: In file included from arch/s390/include/asm/io.h:78: include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 547 | val = __raw_readb(PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 560 | val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); | ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu' 37 | #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x)) | ^ include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16' 102 | #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x)) | ^ In file included from drivers/clk/clk-fixed-mmio.c:13: In file included from include/linux/io.h:13: In file included from arch/s390/include/asm/io.h:78: include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 573 | val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); | ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu' 35 | #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) | ^ include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32' 115 | #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x)) | ^ In file included from drivers/clk/clk-fixed-mmio.c:13: In file included from include/linux/io.h:13: In file included from arch/s390/include/asm/io.h:78: include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 584 | __raw_writeb(value, PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 594 | __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 604 | __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:692:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 692 | readsb(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:700:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 700 | readsw(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:708:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 708 | readsl(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:717:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 717 | writesb(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:726:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 726 | writesw(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:735:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 735 | writesl(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ >> drivers/clk/clk-fixed-mmio.c:33:2: error: call to undeclared function 'iounmap'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 33 | iounmap(base); | ^ arch/s390/include/asm/io.h:29:17: note: expanded from macro 'iounmap' 29 | #define iounmap iounmap | ^ drivers/clk/clk-fixed-mmio.c:33:2: note: did you mean 'vunmap'? arch/s390/include/asm/io.h:29:17: note: expanded from macro 'iounmap' 29 | #define iounmap iounmap | ^ include/linux/vmalloc.h:167:13: note: 'vunmap' declared here 167 | extern void vunmap(const void *addr); | ^ 12 warnings and 1 error generated. vim +/iounmap +33 drivers/clk/clk-fixed-mmio.c 50cc4caf531abb2 Jan Kotas 2018-12-13 17 50cc4caf531abb2 Jan Kotas 2018-12-13 18 static struct clk_hw *fixed_mmio_clk_setup(struct device_node *node) 50cc4caf531abb2 Jan Kotas 2018-12-13 19 { 50cc4caf531abb2 Jan Kotas 2018-12-13 20 struct clk_hw *clk; 50cc4caf531abb2 Jan Kotas 2018-12-13 21 const char *clk_name = node->name; 50cc4caf531abb2 Jan Kotas 2018-12-13 22 void __iomem *base; 50cc4caf531abb2 Jan Kotas 2018-12-13 23 u32 freq; 50cc4caf531abb2 Jan Kotas 2018-12-13 24 int ret; 50cc4caf531abb2 Jan Kotas 2018-12-13 25 50cc4caf531abb2 Jan Kotas 2018-12-13 26 base = of_iomap(node, 0); 50cc4caf531abb2 Jan Kotas 2018-12-13 27 if (!base) { 50cc4caf531abb2 Jan Kotas 2018-12-13 28 pr_err("%pOFn: failed to map address\n", node); 50cc4caf531abb2 Jan Kotas 2018-12-13 29 return ERR_PTR(-EIO); 50cc4caf531abb2 Jan Kotas 2018-12-13 30 } 50cc4caf531abb2 Jan Kotas 2018-12-13 31 50cc4caf531abb2 Jan Kotas 2018-12-13 32 freq = readl(base); 50cc4caf531abb2 Jan Kotas 2018-12-13 @33 iounmap(base); 50cc4caf531abb2 Jan Kotas 2018-12-13 34 of_property_read_string(node, "clock-output-names", &clk_name); 50cc4caf531abb2 Jan Kotas 2018-12-13 35 50cc4caf531abb2 Jan Kotas 2018-12-13 36 clk = clk_hw_register_fixed_rate(NULL, clk_name, NULL, 0, freq); 50cc4caf531abb2 Jan Kotas 2018-12-13 37 if (IS_ERR(clk)) { 50cc4caf531abb2 Jan Kotas 2018-12-13 38 pr_err("%pOFn: failed to register fixed rate clock\n", node); 50cc4caf531abb2 Jan Kotas 2018-12-13 39 return clk; 50cc4caf531abb2 Jan Kotas 2018-12-13 40 } 50cc4caf531abb2 Jan Kotas 2018-12-13 41 50cc4caf531abb2 Jan Kotas 2018-12-13 42 ret = of_clk_add_hw_provider(node, of_clk_hw_simple_get, clk); 50cc4caf531abb2 Jan Kotas 2018-12-13 43 if (ret) { 50cc4caf531abb2 Jan Kotas 2018-12-13 44 pr_err("%pOFn: failed to add clock provider\n", node); 50cc4caf531abb2 Jan Kotas 2018-12-13 45 clk_hw_unregister(clk); 50cc4caf531abb2 Jan Kotas 2018-12-13 46 clk = ERR_PTR(ret); 50cc4caf531abb2 Jan Kotas 2018-12-13 47 } 50cc4caf531abb2 Jan Kotas 2018-12-13 48 50cc4caf531abb2 Jan Kotas 2018-12-13 49 return clk; 50cc4caf531abb2 Jan Kotas 2018-12-13 50 } 50cc4caf531abb2 Jan Kotas 2018-12-13 51 :::::: The code at line 33 was first introduced by commit :::::: 50cc4caf531abb2075c6973451fccdaba9f02715 clk: Add Fixed MMIO clock driver :::::: TO: Jan Kotas <jank@xxxxxxxxxxx> :::::: CC: Stephen Boyd <sboyd@xxxxxxxxxx> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
