Hi Linus, FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 0cbbc422d56668528f6efd1234fe908010284082 commit: 7d4defe21c682c934a19fce1ba8b54b7bde61b08 gpio: include <linux/io-mapping.h> in gpiolib-of date: 9 weeks ago config: um-allyesconfig (attached as .config) compiler: gcc-6 (Debian 6.1.1-9) 6.1.1 20160705 reproduce: git checkout 7d4defe21c682c934a19fce1ba8b54b7bde61b08 # save the attached .config to linux build tree make ARCH=um All errors (new ones prefixed by >>): In file included from drivers/gpio/gpiolib-of.c:19:0: include/linux/io-mapping.h: In function 'io_mapping_create_wc': >> include/linux/io-mapping.h:130:39: error: implicit declaration of function >> 'ioremap_wc' [-Werror=implicit-function-declaration] return (struct io_mapping __force *) ioremap_wc(base, size); ^~~~~~~~~~ include/linux/io-mapping.h:130:9: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] return (struct io_mapping __force *) ioremap_wc(base, size); ^ include/linux/io-mapping.h: In function 'io_mapping_free': >> include/linux/io-mapping.h:136:2: error: implicit declaration of function >> 'iounmap' [-Werror=implicit-function-declaration] iounmap((void __force __iomem *) mapping); ^~~~~~~ cc1: some warnings being treated as errors vim +/ioremap_wc +130 include/linux/io-mapping.h 4ab0d47d Venkatesh Pallipadi 2009-02-24 124 struct io_mapping; 4ab0d47d Venkatesh Pallipadi 2009-02-24 125 e5beae16 Keith Packard 2008-11-03 126 /* Create the io_mapping object*/ 9663f2e6 Keith Packard 2008-10-30 127 static inline struct io_mapping * 4ab0d47d Venkatesh Pallipadi 2009-02-24 128 io_mapping_create_wc(resource_size_t base, unsigned long size) 9663f2e6 Keith Packard 2008-10-30 129 { 29bc17ec Francisco Jerez 2010-09-04 @130 return (struct io_mapping __force *) ioremap_wc(base, size); 9663f2e6 Keith Packard 2008-10-30 131 } 9663f2e6 Keith Packard 2008-10-30 132 9663f2e6 Keith Packard 2008-10-30 133 static inline void 9663f2e6 Keith Packard 2008-10-30 134 io_mapping_free(struct io_mapping *mapping) 9663f2e6 Keith Packard 2008-10-30 135 { 29bc17ec Francisco Jerez 2010-09-04 @136 iounmap((void __force __iomem *) mapping); 9663f2e6 Keith Packard 2008-10-30 137 } 9663f2e6 Keith Packard 2008-10-30 138 9663f2e6 Keith Packard 2008-10-30 139 /* Atomic map/unmap */ :::::: The code at line 130 was first introduced by commit :::::: 29bc17ecb856ffb2b47c7009a71971c6f9334205 io-mapping: Fix the address space annotations :::::: TO: Francisco Jerez <curroje...@riseup.net> :::::: CC: Ingo Molnar <mi...@elte.hu> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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