Re: [PATCH] kexec: allow KEXEC_HANDOVER to build with COMPILE_TEST

kernel test robot
2026-02-05T00:22:42Z

Hi Sasha,

kernel test robot noticed the following build warnings:

[auto build test WARNING on linus/master]
[also build test WARNING on v6.19-rc8 next-20260204]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url: https://github.com/intel-lab-lkp/linux/commits/Sasha-Levin/kexec-allow-KEXEC_HANDOVER-to-build-with-COMPILE_TEST/20260205-023202
base: linus/master
patch link: https://lore.kernel.org/r/20260204182816.2463931-1-sashal%40kernel.org
patch subject: [PATCH] kexec: allow KEXEC_HANDOVER to build with COMPILE_TEST
config: sh-allmodconfig (https://download.01.org/0day-ci/archive/20260205/202602050807.0QRxP8b3-lkp@intel.com/config)
compiler: sh4-linux-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260205/202602050807.0QRxP8b3-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/202602050807.0QRxP8b3-lkp@intel.com/

All warnings (new ones prefixed by >>):

kernel/liveupdate/kexec_handover_debugfs.c: In function 'scratch_phys_show':
>> kernel/liveupdate/kexec_handover_debugfs.c:99:37: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'phys_addr_t' {aka 'unsigned int'} [-Wformat=]
99 | seq_printf(m, "0x%llx\n", kho_scratch[i].addr);
| ~~~^ ~~~~~~~~~~~~~~~~~~~
| | |
| | phys_addr_t {aka unsigned int}
| long long unsigned int
| %x
kernel/liveupdate/kexec_handover_debugfs.c: In function 'scratch_len_show':
kernel/liveupdate/kexec_handover_debugfs.c:108:37: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'phys_addr_t' {aka 'unsigned int'} [-Wformat=]
108 | seq_printf(m, "0x%llx\n", kho_scratch[i].size);
| ~~~^ ~~~~~~~~~~~~~~~~~~~
| | |
| | phys_addr_t {aka unsigned int}
| long long unsigned int
| %x
In file included from include/linux/io.h:12,
from kernel/liveupdate/kexec_handover_debugfs.c:13:
kernel/liveupdate/kexec_handover_debugfs.c: In function 'kho_in_debugfs_init':
>> arch/sh/include/asm/io.h:266:34: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
266 | #define phys_to_virt(address) ((void *)(address))
| ^
kernel/liveupdate/kexec_handover_debugfs.c:151:45: note: in expansion of macro 'phys_to_virt'
151 | phys_to_virt(*fdt_phys));
| ^~~~~~~~~~~~

Kconfig warnings: (for reference only)
WARNING: unmet direct dependencies detected for CMA
Depends on [n]: MMU [=n]
Selected by [y]:
- KEXEC_HANDOVER [=y] && (ARCH_SUPPORTS_KEXEC_HANDOVER && ARCH_SUPPORTS_KEXEC_FILE || COMPILE_TEST [=y]) && (!DEFERRED_STRUCT_PAGE_INIT [=n] || COMPILE_TEST [=y])

vim +99 kernel/liveupdate/kexec_handover_debugfs.c

03d3963464a436 kernel/kexec_handover_debugfs.c Pasha Tatashin 2025-11-01 92
03d3963464a436 kernel/kexec_handover_debugfs.c Pasha Tatashin 2025-11-01 93 DEFINE_DEBUGFS_ATTRIBUTE(kho_out_finalize_fops, kho_out_finalize_get,
03d3963464a436 kernel/kexec_handover_debugfs.c Pasha Tatashin 2025-11-01 94 kho_out_finalize_set, "%llu\n");
03d3963464a436 kernel/kexec_handover_debugfs.c Pasha Tatashin 2025-11-01 95
03d3963464a436 kernel/kexec_handover_debugfs.c Pasha Tatashin 2025-11-01 96 static int scratch_phys_show(struct seq_file *m, void *v)
03d3963464a436 kernel/kexec_handover_debugfs.c Pasha Tatashin 2025-11-01 97 {
03d3963464a436 kernel/kexec_handover_debugfs.c Pasha Tatashin 2025-11-01 98 for (int i = 0; i < kho_scratch_cnt; i++)
03d3963464a436 kernel/kexec_handover_debugfs.c Pasha Tatashin 2025-11-01 @99 seq_printf(m, "0x%llx\n", kho_scratch[i].addr);
03d3963464a436 kernel/kexec_handover_debugfs.c Pasha Tatashin 2025-11-01 100
03d3963464a436 kernel/kexec_handover_debugfs.c Pasha Tatashin 2025-11-01 101 return 0;
03d3963464a436 kernel/kexec_handover_debugfs.c Pasha Tatashin 2025-11-01 102 }
03d3963464a436 kernel/kexec_handover_debugfs.c Pasha Tatashin 2025-11-01 103 DEFINE_SHOW_ATTRIBUTE(scratch_phys);
03d3963464a436 kernel/kexec_handover_debugfs.c Pasha Tatashin 2025-11-01 104

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