Hi Geert, I love your patch! Yet something to improve: [auto build test ERROR on robh/for-next] [also build test ERROR on v4.15-rc6 next-20180103] [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/Geert-Uytterhoeven/of-fdt-Fix-ifdef-dependency-of-early-flattree-declarations/20180104-062259 base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next 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 errors (new ones prefixed by >>): arch/cris/kernel/setup.c: In function 'setup_arch': >> arch/cris/kernel/setup.c:151:2: error: implicit declaration of function 'unflatten_and_copy_device_tree' [-Werror=implicit-function-declaration] unflatten_and_copy_device_tree(); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/unflatten_and_copy_device_tree +151 arch/cris/kernel/setup.c a9f75ac5 Rabin Vincent 2015-02-08 73 ^1da177e Linus Torvalds 2005-04-16 74 /* register an initial console printing routine for printk's */ ^1da177e Linus Torvalds 2005-04-16 75 ^1da177e Linus Torvalds 2005-04-16 76 init_etrax_debug(); ^1da177e Linus Torvalds 2005-04-16 77 ^1da177e Linus Torvalds 2005-04-16 78 /* we should really poll for DRAM size! */ ^1da177e Linus Torvalds 2005-04-16 79 ^1da177e Linus Torvalds 2005-04-16 80 high_memory = &dram_end; ^1da177e Linus Torvalds 2005-04-16 81 ^1da177e Linus Torvalds 2005-04-16 82 if(romfs_in_flash || !romfs_length) { ^1da177e Linus Torvalds 2005-04-16 83 /* if we have the romfs in flash, or if there is no rom filesystem, ^1da177e Linus Torvalds 2005-04-16 84 * our free area starts directly after the BSS ^1da177e Linus Torvalds 2005-04-16 85 */ ^1da177e Linus Torvalds 2005-04-16 86 memory_start = (unsigned long) &_end; ^1da177e Linus Torvalds 2005-04-16 87 } else { ^1da177e Linus Torvalds 2005-04-16 88 /* otherwise the free area starts after the ROM filesystem */ ^1da177e Linus Torvalds 2005-04-16 89 printk("ROM fs in RAM, size %lu bytes\n", romfs_length); ^1da177e Linus Torvalds 2005-04-16 90 memory_start = romfs_start + romfs_length; ^1da177e Linus Torvalds 2005-04-16 91 } ^1da177e Linus Torvalds 2005-04-16 92 ^1da177e Linus Torvalds 2005-04-16 93 /* process 1's initial memory region is the kernel code/data */ ^1da177e Linus Torvalds 2005-04-16 94 ^1da177e Linus Torvalds 2005-04-16 95 init_mm.start_code = (unsigned long) &text_start; ^1da177e Linus Torvalds 2005-04-16 96 init_mm.end_code = (unsigned long) &_etext; ^1da177e Linus Torvalds 2005-04-16 97 init_mm.end_data = (unsigned long) &_edata; ^1da177e Linus Torvalds 2005-04-16 98 init_mm.brk = (unsigned long) &_end; ^1da177e Linus Torvalds 2005-04-16 99 ^1da177e Linus Torvalds 2005-04-16 100 /* min_low_pfn points to the start of DRAM, start_pfn points ^1da177e Linus Torvalds 2005-04-16 101 * to the first DRAM pages after the kernel, and max_low_pfn ^1da177e Linus Torvalds 2005-04-16 102 * to the end of DRAM. ^1da177e Linus Torvalds 2005-04-16 103 */ ^1da177e Linus Torvalds 2005-04-16 104 ^1da177e Linus Torvalds 2005-04-16 105 /* ^1da177e Linus Torvalds 2005-04-16 106 * partially used pages are not usable - thus ^1da177e Linus Torvalds 2005-04-16 107 * we are rounding upwards: ^1da177e Linus Torvalds 2005-04-16 108 */ ^1da177e Linus Torvalds 2005-04-16 109 ^1da177e Linus Torvalds 2005-04-16 110 start_pfn = PFN_UP(memory_start); /* usually c0000000 + kernel + romfs */ ^1da177e Linus Torvalds 2005-04-16 111 max_pfn = PFN_DOWN((unsigned long)high_memory); /* usually c0000000 + dram size */ ^1da177e Linus Torvalds 2005-04-16 112 ^1da177e Linus Torvalds 2005-04-16 113 /* ^1da177e Linus Torvalds 2005-04-16 114 * Initialize the boot-time allocator (start, end) ^1da177e Linus Torvalds 2005-04-16 115 * ^1da177e Linus Torvalds 2005-04-16 116 * We give it access to all our DRAM, but we could as well just have ^1da177e Linus Torvalds 2005-04-16 117 * given it a small slice. No point in doing that though, unless we ^1da177e Linus Torvalds 2005-04-16 118 * have non-contiguous memory and want the boot-stuff to be in, say, ^1da177e Linus Torvalds 2005-04-16 119 * the smallest area. ^1da177e Linus Torvalds 2005-04-16 120 * ^1da177e Linus Torvalds 2005-04-16 121 * It will put a bitmap of the allocated pages in the beginning ^1da177e Linus Torvalds 2005-04-16 122 * of the range we give it, but it won't mark the bitmaps pages ^1da177e Linus Torvalds 2005-04-16 123 * as reserved. We have to do that ourselves below. ^1da177e Linus Torvalds 2005-04-16 124 * ^1da177e Linus Torvalds 2005-04-16 125 * We need to use init_bootmem_node instead of init_bootmem ^1da177e Linus Torvalds 2005-04-16 126 * because our map starts at a quite high address (min_low_pfn). ^1da177e Linus Torvalds 2005-04-16 127 */ ^1da177e Linus Torvalds 2005-04-16 128 ^1da177e Linus Torvalds 2005-04-16 129 max_low_pfn = max_pfn; ^1da177e Linus Torvalds 2005-04-16 130 min_low_pfn = PAGE_OFFSET >> PAGE_SHIFT; ^1da177e Linus Torvalds 2005-04-16 131 ^1da177e Linus Torvalds 2005-04-16 132 bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn, ^1da177e Linus Torvalds 2005-04-16 133 min_low_pfn, ^1da177e Linus Torvalds 2005-04-16 134 max_low_pfn); ^1da177e Linus Torvalds 2005-04-16 135 ^1da177e Linus Torvalds 2005-04-16 136 /* And free all memory not belonging to the kernel (addr, size) */ ^1da177e Linus Torvalds 2005-04-16 137 ^1da177e Linus Torvalds 2005-04-16 138 free_bootmem(PFN_PHYS(start_pfn), PFN_PHYS(max_pfn - start_pfn)); ^1da177e Linus Torvalds 2005-04-16 139 ^1da177e Linus Torvalds 2005-04-16 140 /* ^1da177e Linus Torvalds 2005-04-16 141 * Reserve the bootmem bitmap itself as well. We do this in two ^1da177e Linus Torvalds 2005-04-16 142 * steps (first step was init_bootmem()) because this catches ^1da177e Linus Torvalds 2005-04-16 143 * the (very unlikely) case of us accidentally initializing the ^1da177e Linus Torvalds 2005-04-16 144 * bootmem allocator with an invalid RAM area. ^1da177e Linus Torvalds 2005-04-16 145 * ^1da177e Linus Torvalds 2005-04-16 146 * Arguments are start, size ^1da177e Linus Torvalds 2005-04-16 147 */ ^1da177e Linus Torvalds 2005-04-16 148 72a7fe39 Bernhard Walle 2008-02-07 149 reserve_bootmem(PFN_PHYS(start_pfn), bootmap_size, BOOTMEM_DEFAULT); ^1da177e Linus Torvalds 2005-04-16 150 a9f75ac5 Rabin Vincent 2015-02-08 @151 unflatten_and_copy_device_tree(); a9f75ac5 Rabin Vincent 2015-02-08 152 ^1da177e Linus Torvalds 2005-04-16 153 /* paging_init() sets up the MMU and marks all pages as reserved */ ^1da177e Linus Torvalds 2005-04-16 154 ^1da177e Linus Torvalds 2005-04-16 155 paging_init(); ^1da177e Linus Torvalds 2005-04-16 156 7cf32cad Mikael Starvik 2005-07-27 157 *cmdline_p = cris_command_line; ^1da177e Linus Torvalds 2005-04-16 158 :::::: The code at line 151 was first introduced by commit :::::: a9f75ac5a24cb94c2373daa3d73f90d22cf5d94b CRISv32: add device tree support :::::: TO: Rabin Vincent <rabin@xxxxxx> :::::: CC: Jesper Nilsson <jespern@xxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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