From: kernel test robot <lkp@intel.com>
To: Brian Cain <brian.cain@oss.qualcomm.com>
Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev
Subject: [bcain:bcain/boot_qemu 17/40] arch/hexagon/kernel/setup.c:50:15: error: use of undeclared identifier '__dtb_start'; did you mean '__bss_start'?
Date: Sun, 24 May 2026 08:42:54 +0800 [thread overview]
Message-ID: <202605240825.mlcuRxza-lkp@intel.com> (raw)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/bcain/linux.git bcain/boot_qemu
head: 35eb04372bf7b3ef31afcde7c3336a0ff690d16c
commit: 069f8d84bd3fe3a24e07fbf9de23de4537d60c29 [17/40] hexagon: add platform infrastructure
config: hexagon-allnoconfig (https://download.01.org/0day-ci/archive/20260524/202605240825.mlcuRxza-lkp@intel.com/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project 5bac06718f502014fade905512f1d26d578a18f3)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260524/202605240825.mlcuRxza-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202605240825.mlcuRxza-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from arch/hexagon/kernel/setup.c:22:
arch/hexagon/include/asm/platform.h:29:13: error: conflicting types for 'early_memtest'
29 | extern void early_memtest(unsigned long start, unsigned long end);
| ^
include/linux/memblock.h:609:20: note: previous definition is here
609 | static inline void early_memtest(phys_addr_t start, phys_addr_t end) { }
| ^
arch/hexagon/kernel/setup.c:49:13: error: use of undeclared identifier 'external_buffer'
49 | char *p = &external_buffer;
| ^~~~~~~~~~~~~~~
>> arch/hexagon/kernel/setup.c:50:15: error: use of undeclared identifier '__dtb_start'; did you mean '__bss_start'?
50 | void *dtb = &__dtb_start;
| ^~~~~~~~~~~
| __bss_start
include/asm-generic/sections.h:37:13: note: '__bss_start' declared here
37 | extern char __bss_start[], __bss_stop[];
| ^
3 errors generated.
vim +50 arch/hexagon/kernel/setup.c
e03167b26b7fcf Richard Kuo 2011-10-31 41
e03167b26b7fcf Richard Kuo 2011-10-31 42 /*
e03167b26b7fcf Richard Kuo 2011-10-31 43 * setup_arch - high level architectural setup routine
e03167b26b7fcf Richard Kuo 2011-10-31 44 * @cmdline_p: pointer to pointer to command-line arguments
e03167b26b7fcf Richard Kuo 2011-10-31 45 */
e03167b26b7fcf Richard Kuo 2011-10-31 46
e03167b26b7fcf Richard Kuo 2011-10-31 47 void __init setup_arch(char **cmdline_p)
e03167b26b7fcf Richard Kuo 2011-10-31 48 {
af437bfe6b48c6 Brian Cain 2026-01-24 @49 char *p = &external_buffer;
af437bfe6b48c6 Brian Cain 2026-01-24 @50 void *dtb = &__dtb_start;
e03167b26b7fcf Richard Kuo 2011-10-31 51
e03167b26b7fcf Richard Kuo 2011-10-31 52 /*
e03167b26b7fcf Richard Kuo 2011-10-31 53 * Set up event bindings to handle exceptions and interrupts.
e03167b26b7fcf Richard Kuo 2011-10-31 54 */
e03167b26b7fcf Richard Kuo 2011-10-31 55 __vmsetvec(_K_VM_event_vector);
e03167b26b7fcf Richard Kuo 2011-10-31 56
2738f359b1dcae Randy Dunlap 2018-06-14 57 printk(KERN_INFO "PHYS_OFFSET=0x%08lx\n", PHYS_OFFSET);
af437bfe6b48c6 Brian Cain 2026-01-24 58 /* initial machine setup from flattened device tree */
af437bfe6b48c6 Brian Cain 2026-01-24 59 mdesc = setup_machine_fdt(dtb);
af437bfe6b48c6 Brian Cain 2026-01-24 60
af437bfe6b48c6 Brian Cain 2026-01-24 61 if (!mdesc)
af437bfe6b48c6 Brian Cain 2026-01-24 62 panic("setup_machine_fdt returned NULL\n");
8f5a0b9dffeb3c Richard Kuo 2013-03-22 63
af437bfe6b48c6 Brian Cain 2026-01-24 64 if (mdesc->setup_arch_platform) {
af437bfe6b48c6 Brian Cain 2026-01-24 65 mdesc->setup_arch_platform();
af437bfe6b48c6 Brian Cain 2026-01-24 66 }
af437bfe6b48c6 Brian Cain 2026-01-24 67
af437bfe6b48c6 Brian Cain 2026-01-24 68 printk("vmversion=0x%08lx\n", vmversion);
af437bfe6b48c6 Brian Cain 2026-01-24 69 printk("vm build id=0x%08lx\n", __vmgetinfo(vm_info_build_id));
af437bfe6b48c6 Brian Cain 2026-01-24 70 printk("boot_info=%p\n", boot_info);
e03167b26b7fcf Richard Kuo 2011-10-31 71 /*
af437bfe6b48c6 Brian Cain 2026-01-24 72 * Will need to work on boot specification.
e03167b26b7fcf Richard Kuo 2011-10-31 73 */
af437bfe6b48c6 Brian Cain 2026-01-24 74 // Todo: seriously need to fix this for all platforms
af437bfe6b48c6 Brian Cain 2026-01-24 75 #ifdef CONFIG_HEXAGON_MSM8960_FLUID
af437bfe6b48c6 Brian Cain 2026-01-24 76 {
af437bfe6b48c6 Brian Cain 2026-01-24 77 unsigned int *magic;
af437bfe6b48c6 Brian Cain 2026-01-24 78
af437bfe6b48c6 Brian Cain 2026-01-24 79 p = NULL;
af437bfe6b48c6 Brian Cain 2026-01-24 80 for (magic = (unsigned int *)&external_buffer;
af437bfe6b48c6 Brian Cain 2026-01-24 81 magic < ((unsigned int *)&external_buffer) + 32; magic++) {
af437bfe6b48c6 Brian Cain 2026-01-24 82 if (*magic == 0x54410009) {
af437bfe6b48c6 Brian Cain 2026-01-24 83 p = (char *)++magic;
af437bfe6b48c6 Brian Cain 2026-01-24 84 break;
af437bfe6b48c6 Brian Cain 2026-01-24 85 }
af437bfe6b48c6 Brian Cain 2026-01-24 86 }
af437bfe6b48c6 Brian Cain 2026-01-24 87 }
af437bfe6b48c6 Brian Cain 2026-01-24 88 #endif
e03167b26b7fcf Richard Kuo 2011-10-31 89
:::::: The code at line 50 was first introduced by commit
:::::: af437bfe6b48c6b7436b42f989f7eeb4afc5cfbc hexagon: update boot and setup code
:::::: TO: Brian Cain <brian.cain@oss.qualcomm.com>
:::::: CC: Brian Cain <brian.cain@oss.qualcomm.com>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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