kernel/liveupdate/Kconfig | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
Currently allmodconfig sets CONFIG_DEFERRED_STRUCT_PAGE_INIT which prevents KHO
from building.
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
kernel/liveupdate/Kconfig | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/kernel/liveupdate/Kconfig b/kernel/liveupdate/Kconfig
index d2aeaf13c3acb..355b43492b8a4 100644
--- a/kernel/liveupdate/Kconfig
+++ b/kernel/liveupdate/Kconfig
@@ -1,14 +1,14 @@
# SPDX-License-Identifier: GPL-2.0-only
menu "Live Update and Kexec HandOver"
- depends on !DEFERRED_STRUCT_PAGE_INIT
+ depends on !DEFERRED_STRUCT_PAGE_INIT || COMPILE_TEST
config KEXEC_HANDOVER
bool "kexec handover"
- depends on ARCH_SUPPORTS_KEXEC_HANDOVER && ARCH_SUPPORTS_KEXEC_FILE
- depends on !DEFERRED_STRUCT_PAGE_INIT
+ depends on (ARCH_SUPPORTS_KEXEC_HANDOVER && ARCH_SUPPORTS_KEXEC_FILE) || COMPILE_TEST
+ depends on !DEFERRED_STRUCT_PAGE_INIT || COMPILE_TEST
select MEMBLOCK_KHO_SCRATCH
- select KEXEC_FILE
+ select KEXEC_FILE if ARCH_SUPPORTS_KEXEC_FILE
select LIBFDT
select CMA
help
--
2.51.0Hi 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-kismet-CONFIG_CMA-CONFIG_KEXEC_HANDOVER-0-0 (https://download.01.org/0day-ci/archive/20260205/202602051345.Yz2vgJHk-lkp@intel.com/config)
reproduce: (https://download.01.org/0day-ci/archive/20260205/202602051345.Yz2vgJHk-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/202602051345.Yz2vgJHk-lkp@intel.com/
kismet warnings: (new ones prefixed by >>)
>> kismet: WARNING: unmet direct dependencies detected for CMA when selected by KEXEC_HANDOVER
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])
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
On Wed, Feb 04, 2026 at 01:28:16PM -0500, Sasha Levin wrote: > Currently allmodconfig sets CONFIG_DEFERRED_STRUCT_PAGE_INIT which prevents KHO > from building. > > Signed-off-by: Sasha Levin <sashal@kernel.org> > --- > kernel/liveupdate/Kconfig | 8 ++++---- > 1 file changed, 4 insertions(+), 4 deletions(-) > > diff --git a/kernel/liveupdate/Kconfig b/kernel/liveupdate/Kconfig > index d2aeaf13c3acb..355b43492b8a4 100644 > --- a/kernel/liveupdate/Kconfig > +++ b/kernel/liveupdate/Kconfig > @@ -1,14 +1,14 @@ > # SPDX-License-Identifier: GPL-2.0-only > > menu "Live Update and Kexec HandOver" > - depends on !DEFERRED_STRUCT_PAGE_INIT > + depends on !DEFERRED_STRUCT_PAGE_INIT || COMPILE_TEST > > config KEXEC_HANDOVER > bool "kexec handover" > - depends on ARCH_SUPPORTS_KEXEC_HANDOVER && ARCH_SUPPORTS_KEXEC_FILE > - depends on !DEFERRED_STRUCT_PAGE_INIT > + depends on (ARCH_SUPPORTS_KEXEC_HANDOVER && ARCH_SUPPORTS_KEXEC_FILE) || COMPILE_TEST I don't think we want to build this for all architectures. Let's keep depends on ARCH_ as it was. > + depends on !DEFERRED_STRUCT_PAGE_INIT || COMPILE_TEST > select MEMBLOCK_KHO_SCRATCH > - select KEXEC_FILE > + select KEXEC_FILE if ARCH_SUPPORTS_KEXEC_FILE > select LIBFDT > select CMA > help > -- > 2.51.0 > -- Sincerely yours, Mike.
On Thu, Feb 05 2026, Mike Rapoport wrote: > On Wed, Feb 04, 2026 at 01:28:16PM -0500, Sasha Levin wrote: >> Currently allmodconfig sets CONFIG_DEFERRED_STRUCT_PAGE_INIT which prevents KHO >> from building. >> >> Signed-off-by: Sasha Levin <sashal@kernel.org> >> --- >> kernel/liveupdate/Kconfig | 8 ++++---- >> 1 file changed, 4 insertions(+), 4 deletions(-) >> >> diff --git a/kernel/liveupdate/Kconfig b/kernel/liveupdate/Kconfig >> index d2aeaf13c3acb..355b43492b8a4 100644 >> --- a/kernel/liveupdate/Kconfig >> +++ b/kernel/liveupdate/Kconfig >> @@ -1,14 +1,14 @@ >> # SPDX-License-Identifier: GPL-2.0-only >> >> menu "Live Update and Kexec HandOver" >> - depends on !DEFERRED_STRUCT_PAGE_INIT >> + depends on !DEFERRED_STRUCT_PAGE_INIT || COMPILE_TEST >> >> config KEXEC_HANDOVER >> bool "kexec handover" >> - depends on ARCH_SUPPORTS_KEXEC_HANDOVER && ARCH_SUPPORTS_KEXEC_FILE >> - depends on !DEFERRED_STRUCT_PAGE_INIT >> + depends on (ARCH_SUPPORTS_KEXEC_HANDOVER && ARCH_SUPPORTS_KEXEC_FILE) || COMPILE_TEST > > I don't think we want to build this for all architectures. > Let's keep depends on ARCH_ as it was. Yep. All these test robot warnings are because a bunch of KHO/LUO code assumes 64-bit arch. > >> + depends on !DEFERRED_STRUCT_PAGE_INIT || COMPILE_TEST >> select MEMBLOCK_KHO_SCRATCH >> - select KEXEC_FILE >> + select KEXEC_FILE if ARCH_SUPPORTS_KEXEC_FILE If arch does not support kexec_file we can't use KHO at all anyway. So I am not sure if this makes sense. >> select LIBFDT >> select CMA >> help >> -- >> 2.51.0 >> -- Regards, Pratyush Yadav
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: um-allyesconfig (https://download.01.org/0day-ci/archive/20260205/202602050952.VeOX2Uoh-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260205/202602050952.VeOX2Uoh-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/202602050952.VeOX2Uoh-lkp@intel.com/
All warnings (new ones prefixed by >>):
kernel/liveupdate/kexec_handover.c: In function 'kho_fill_kimage':
kernel/liveupdate/kexec_handover.c:1547:26: error: storage size of 'scratch' isn't known
1547 | struct kexec_buf scratch;
| ^~~~~~~
kernel/liveupdate/kexec_handover.c:1552:14: error: invalid use of undefined type 'struct kimage'
1552 | image->kho.fdt = virt_to_phys(kho_out.fdt);
| ^~
kernel/liveupdate/kexec_handover.c:1556:18: error: 'struct kexec_buf' has no member named 'image'
1556 | .image = image,
| ^~~~~
>> kernel/liveupdate/kexec_handover.c:1556:26: warning: excess elements in struct initializer
1556 | .image = image,
| ^~~~~
kernel/liveupdate/kexec_handover.c:1556:26: note: (near initialization for '(anonymous)')
kernel/liveupdate/kexec_handover.c:1557:18: error: 'struct kexec_buf' has no member named 'buffer'
1557 | .buffer = kho_scratch,
| ^~~~~~
kernel/liveupdate/kexec_handover.c:1557:27: warning: excess elements in struct initializer
1557 | .buffer = kho_scratch,
| ^~~~~~~~~~~
kernel/liveupdate/kexec_handover.c:1557:27: note: (near initialization for '(anonymous)')
kernel/liveupdate/kexec_handover.c:1558:18: error: 'struct kexec_buf' has no member named 'bufsz'
1558 | .bufsz = scratch_size,
| ^~~~~
kernel/liveupdate/kexec_handover.c:1558:26: warning: excess elements in struct initializer
1558 | .bufsz = scratch_size,
| ^~~~~~~~~~~~
kernel/liveupdate/kexec_handover.c:1558:26: note: (near initialization for '(anonymous)')
kernel/liveupdate/kexec_handover.c:1559:18: error: 'struct kexec_buf' has no member named 'mem'
1559 | .mem = KEXEC_BUF_MEM_UNKNOWN,
| ^~~
kernel/liveupdate/kexec_handover.c:1559:24: error: 'KEXEC_BUF_MEM_UNKNOWN' undeclared (first use in this function)
1559 | .mem = KEXEC_BUF_MEM_UNKNOWN,
| ^~~~~~~~~~~~~~~~~~~~~
kernel/liveupdate/kexec_handover.c:1559:24: note: each undeclared identifier is reported only once for each function it appears in
kernel/liveupdate/kexec_handover.c:1559:24: warning: excess elements in struct initializer
kernel/liveupdate/kexec_handover.c:1559:24: note: (near initialization for '(anonymous)')
kernel/liveupdate/kexec_handover.c:1560:18: error: 'struct kexec_buf' has no member named 'memsz'
1560 | .memsz = scratch_size,
| ^~~~~
kernel/liveupdate/kexec_handover.c:1560:26: warning: excess elements in struct initializer
1560 | .memsz = scratch_size,
| ^~~~~~~~~~~~
kernel/liveupdate/kexec_handover.c:1560:26: note: (near initialization for '(anonymous)')
kernel/liveupdate/kexec_handover.c:1561:18: error: 'struct kexec_buf' has no member named 'buf_align'
1561 | .buf_align = SZ_64K, /* Makes it easier to map */
| ^~~~~~~~~
In file included from include/linux/mm.h:29,
from include/linux/pid_namespace.h:7,
from include/linux/ptrace.h:10,
from include/linux/elfcore.h:11,
from include/linux/vmcore_info.h:6,
from include/linux/kexec.h:18,
from kernel/liveupdate/kexec_handover.c:16:
>> include/linux/sizes.h:28:41: warning: excess elements in struct initializer
28 | #define SZ_64K 0x00010000
| ^~~~~~~~~~
kernel/liveupdate/kexec_handover.c:1561:30: note: in expansion of macro 'SZ_64K'
1561 | .buf_align = SZ_64K, /* Makes it easier to map */
| ^~~~~~
include/linux/sizes.h:28:41: note: (near initialization for '(anonymous)')
28 | #define SZ_64K 0x00010000
| ^~~~~~~~~~
kernel/liveupdate/kexec_handover.c:1561:30: note: in expansion of macro 'SZ_64K'
1561 | .buf_align = SZ_64K, /* Makes it easier to map */
| ^~~~~~
kernel/liveupdate/kexec_handover.c:1562:18: error: 'struct kexec_buf' has no member named 'buf_max'
1562 | .buf_max = ULONG_MAX,
| ^~~~~~~
In file included from include/linux/limits.h:7,
from include/linux/overflow.h:6,
from include/linux/bits.h:32,
from include/linux/bitops.h:6,
from include/linux/bitmap.h:8,
from include/linux/nodemask.h:91,
from include/linux/numa.h:6,
from include/linux/cma.h:7,
from kernel/liveupdate/kexec_handover.c:13:
>> include/vdso/limits.h:13:25: warning: excess elements in struct initializer
13 | #define ULONG_MAX (~0UL)
| ^
kernel/liveupdate/kexec_handover.c:1562:28: note: in expansion of macro 'ULONG_MAX'
1562 | .buf_max = ULONG_MAX,
| ^~~~~~~~~
include/vdso/limits.h:13:25: note: (near initialization for '(anonymous)')
13 | #define ULONG_MAX (~0UL)
| ^
kernel/liveupdate/kexec_handover.c:1562:28: note: in expansion of macro 'ULONG_MAX'
1562 | .buf_max = ULONG_MAX,
| ^~~~~~~~~
kernel/liveupdate/kexec_handover.c:1563:18: error: 'struct kexec_buf' has no member named 'top_down'
1563 | .top_down = true,
| ^~~~~~~~
kernel/liveupdate/kexec_handover.c:1563:29: warning: excess elements in struct initializer
1563 | .top_down = true,
| ^~~~
kernel/liveupdate/kexec_handover.c:1563:29: note: (near initialization for '(anonymous)')
kernel/liveupdate/kexec_handover.c:1555:37: error: invalid use of undefined type 'struct kexec_buf'
1555 | scratch = (struct kexec_buf){
| ^
kernel/liveupdate/kexec_handover.c:1565:15: error: implicit declaration of function 'kexec_add_buffer' [-Wimplicit-function-declaration]
1565 | err = kexec_add_buffer(&scratch);
| ^~~~~~~~~~~~~~~~
kernel/liveupdate/kexec_handover.c:1568:14: error: invalid use of undefined type 'struct kimage'
1568 | image->kho.scratch = &image->segment[image->nr_segments - 1];
| ^~
kernel/liveupdate/kexec_handover.c:1568:36: error: invalid use of undefined type 'struct kimage'
1568 | image->kho.scratch = &image->segment[image->nr_segments - 1];
| ^~
kernel/liveupdate/kexec_handover.c:1568:51: error: invalid use of undefined type 'struct kimage'
1568 | image->kho.scratch = &image->segment[image->nr_segments - 1];
| ^~
>> kernel/liveupdate/kexec_handover.c:1547:26: warning: unused variable 'scratch' [-Wunused-variable]
1547 | struct kexec_buf scratch;
| ^~~~~~~
kernel/liveupdate/kexec_handover.c: In function 'kho_locate_mem_hole':
kernel/liveupdate/kexec_handover.c:1599:32: error: invalid use of undefined type 'struct kexec_buf'
1599 | if (!kho_enable || kbuf->image->type == KEXEC_TYPE_CRASH)
| ^~
kernel/liveupdate/kexec_handover.c:1599:49: error: 'KEXEC_TYPE_CRASH' undeclared (first use in this function); did you mean 'KEXEC_ON_CRASH'?
1599 | if (!kho_enable || kbuf->image->type == KEXEC_TYPE_CRASH)
| ^~~~~~~~~~~~~~~~
| KEXEC_ON_CRASH
vim +1556 kernel/liveupdate/kexec_handover.c
3bdecc3c93f9f6 kernel/kexec_handover.c Alexander Graf 2025-05-09 1542
3bdecc3c93f9f6 kernel/kexec_handover.c Alexander Graf 2025-05-09 1543 int kho_fill_kimage(struct kimage *image)
3bdecc3c93f9f6 kernel/kexec_handover.c Alexander Graf 2025-05-09 1544 {
3bdecc3c93f9f6 kernel/kexec_handover.c Alexander Graf 2025-05-09 1545 ssize_t scratch_size;
3bdecc3c93f9f6 kernel/kexec_handover.c Alexander Graf 2025-05-09 1546 int err = 0;
3bdecc3c93f9f6 kernel/kexec_handover.c Alexander Graf 2025-05-09 @1547 struct kexec_buf scratch;
3bdecc3c93f9f6 kernel/kexec_handover.c Alexander Graf 2025-05-09 1548
d7255959b69a4e kernel/liveupdate/kexec_handover.c Pasha Tatashin 2025-11-14 1549 if (!kho_enable)
3bdecc3c93f9f6 kernel/kexec_handover.c Alexander Graf 2025-05-09 1550 return 0;
3bdecc3c93f9f6 kernel/kexec_handover.c Alexander Graf 2025-05-09 1551
70f9133096c833 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-11-01 1552) image->kho.fdt = virt_to_phys(kho_out.fdt);
3bdecc3c93f9f6 kernel/kexec_handover.c Alexander Graf 2025-05-09 1553
3bdecc3c93f9f6 kernel/kexec_handover.c Alexander Graf 2025-05-09 1554 scratch_size = sizeof(*kho_scratch) * kho_scratch_cnt;
3bdecc3c93f9f6 kernel/kexec_handover.c Alexander Graf 2025-05-09 1555 scratch = (struct kexec_buf){
3bdecc3c93f9f6 kernel/kexec_handover.c Alexander Graf 2025-05-09 @1556 .image = image,
3bdecc3c93f9f6 kernel/kexec_handover.c Alexander Graf 2025-05-09 1557 .buffer = kho_scratch,
3bdecc3c93f9f6 kernel/kexec_handover.c Alexander Graf 2025-05-09 1558 .bufsz = scratch_size,
3bdecc3c93f9f6 kernel/kexec_handover.c Alexander Graf 2025-05-09 1559 .mem = KEXEC_BUF_MEM_UNKNOWN,
3bdecc3c93f9f6 kernel/kexec_handover.c Alexander Graf 2025-05-09 1560 .memsz = scratch_size,
3bdecc3c93f9f6 kernel/kexec_handover.c Alexander Graf 2025-05-09 1561 .buf_align = SZ_64K, /* Makes it easier to map */
3bdecc3c93f9f6 kernel/kexec_handover.c Alexander Graf 2025-05-09 1562 .buf_max = ULONG_MAX,
3bdecc3c93f9f6 kernel/kexec_handover.c Alexander Graf 2025-05-09 1563 .top_down = true,
3bdecc3c93f9f6 kernel/kexec_handover.c Alexander Graf 2025-05-09 1564 };
3bdecc3c93f9f6 kernel/kexec_handover.c Alexander Graf 2025-05-09 1565 err = kexec_add_buffer(&scratch);
3bdecc3c93f9f6 kernel/kexec_handover.c Alexander Graf 2025-05-09 1566 if (err)
3bdecc3c93f9f6 kernel/kexec_handover.c Alexander Graf 2025-05-09 1567 return err;
3bdecc3c93f9f6 kernel/kexec_handover.c Alexander Graf 2025-05-09 @1568 image->kho.scratch = &image->segment[image->nr_segments - 1];
3bdecc3c93f9f6 kernel/kexec_handover.c Alexander Graf 2025-05-09 1569
3bdecc3c93f9f6 kernel/kexec_handover.c Alexander Graf 2025-05-09 1570 return 0;
3bdecc3c93f9f6 kernel/kexec_handover.c Alexander Graf 2025-05-09 1571 }
3bdecc3c93f9f6 kernel/kexec_handover.c Alexander Graf 2025-05-09 1572
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
Hi Sasha,
kernel test robot noticed the following build errors:
[auto build test ERROR on linus/master]
[also build test ERROR 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: hexagon-allmodconfig (https://download.01.org/0day-ci/archive/20260205/202602051021.dhUjHKwO-lkp@intel.com/config)
compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260205/202602051021.dhUjHKwO-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/202602051021.dhUjHKwO-lkp@intel.com/
All error/warnings (new ones prefixed by >>):
>> mm/memfd_luo.c:316:10: warning: format specifies type 'unsigned long long' but the argument has type 'phys_addr_t' (aka 'unsigned int') [-Wformat]
315 | pr_warn_ratelimited("Unable to restore folio at physical address: %llx\n",
| ~~~~
| %x
316 | phys);
| ^~~~
include/linux/printk.h:722:49: note: expanded from macro 'pr_warn_ratelimited'
722 | printk_ratelimited(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
| ~~~ ^~~~~~~~~~~
include/linux/printk.h:706:17: note: expanded from macro 'printk_ratelimited'
706 | printk(fmt, ##__VA_ARGS__); \
| ~~~ ^~~~~~~~~~~
include/linux/printk.h:512:60: note: expanded from macro 'printk'
512 | #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
| ~~~ ^~~~~~~~~~~
include/linux/printk.h:484:19: note: expanded from macro 'printk_index_wrap'
484 | _p_func(_fmt, ##__VA_ARGS__); \
| ~~~~ ^~~~~~~~~~~
mm/memfd_luo.c:372:11: warning: format specifies type 'unsigned long long' but the argument has type 'phys_addr_t' (aka 'unsigned int') [-Wformat]
371 | pr_err("Unable to restore folio at physical address: %llx\n",
| ~~~~
| %x
372 | phys);
| ^~~~
include/linux/printk.h:555:33: note: expanded from macro 'pr_err'
555 | printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
| ~~~ ^~~~~~~~~~~
include/linux/printk.h:512:60: note: expanded from macro 'printk'
512 | #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
| ~~~ ^~~~~~~~~~~
include/linux/printk.h:484:19: note: expanded from macro 'printk_index_wrap'
484 | _p_func(_fmt, ##__VA_ARGS__); \
| ~~~~ ^~~~~~~~~~~
2 warnings generated.
--
>> kernel/liveupdate/kexec_handover.c:25:10: fatal error: 'asm/early_ioremap.h' file not found
25 | #include <asm/early_ioremap.h>
| ^~~~~~~~~~~~~~~~~~~~~
1 error generated.
--
>> kernel/liveupdate/kexec_handover_debugfs.c:99:29: warning: format specifies type 'unsigned long long' but the argument has type 'phys_addr_t' (aka 'unsigned int') [-Wformat]
99 | seq_printf(m, "0x%llx\n", kho_scratch[i].addr);
| ~~~~ ^~~~~~~~~~~~~~~~~~~
| %x
kernel/liveupdate/kexec_handover_debugfs.c:108:29: warning: format specifies type 'unsigned long long' but the argument has type 'phys_addr_t' (aka 'unsigned int') [-Wformat]
108 | seq_printf(m, "0x%llx\n", kho_scratch[i].size);
| ~~~~ ^~~~~~~~~~~~~~~~~~~
| %x
2 warnings generated.
vim +25 kernel/liveupdate/kexec_handover.c
c609c144b0e8db kernel/kexec_handover.c Alexander Graf 2025-05-09 24
c609c144b0e8db kernel/kexec_handover.c Alexander Graf 2025-05-09 @25 #include <asm/early_ioremap.h>
c609c144b0e8db kernel/kexec_handover.c Alexander Graf 2025-05-09 26
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
On Wed, Feb 4, 2026 at 10:28 AM Sasha Levin <sashal@kernel.org> wrote: > > Currently allmodconfig sets CONFIG_DEFERRED_STRUCT_PAGE_INIT which prevents KHO > from building. > > Signed-off-by: Sasha Levin <sashal@kernel.org> Ok, now allmodconfig enables CONFIG_KEXEC_HANDOVER and I can see the breakage Greg was talking about in https://lore.kernel.org/all/2026020419-extortion-swinging-6394@gregkh/ Tested-by: Suren Baghdasaryan <surenb@google.com> > --- > kernel/liveupdate/Kconfig | 8 ++++---- > 1 file changed, 4 insertions(+), 4 deletions(-) > > diff --git a/kernel/liveupdate/Kconfig b/kernel/liveupdate/Kconfig > index d2aeaf13c3acb..355b43492b8a4 100644 > --- a/kernel/liveupdate/Kconfig > +++ b/kernel/liveupdate/Kconfig > @@ -1,14 +1,14 @@ > # SPDX-License-Identifier: GPL-2.0-only > > menu "Live Update and Kexec HandOver" > - depends on !DEFERRED_STRUCT_PAGE_INIT > + depends on !DEFERRED_STRUCT_PAGE_INIT || COMPILE_TEST > > config KEXEC_HANDOVER > bool "kexec handover" > - depends on ARCH_SUPPORTS_KEXEC_HANDOVER && ARCH_SUPPORTS_KEXEC_FILE > - depends on !DEFERRED_STRUCT_PAGE_INIT > + depends on (ARCH_SUPPORTS_KEXEC_HANDOVER && ARCH_SUPPORTS_KEXEC_FILE) || COMPILE_TEST > + depends on !DEFERRED_STRUCT_PAGE_INIT || COMPILE_TEST > select MEMBLOCK_KHO_SCRATCH > - select KEXEC_FILE > + select KEXEC_FILE if ARCH_SUPPORTS_KEXEC_FILE > select LIBFDT > select CMA > help > -- > 2.51.0 >
Currently allmodconfig sets CONFIG_DEFERRED_STRUCT_PAGE_INIT which prevents KHO
from building.
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
Changes since v1:
- Only add COMPILE_TEST to the DEFERRED_STRUCT_PAGE_INIT guards.
kernel/liveupdate/Kconfig | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/kernel/liveupdate/Kconfig b/kernel/liveupdate/Kconfig
index d2aeaf13c3acb..a5d5391e9cf76 100644
--- a/kernel/liveupdate/Kconfig
+++ b/kernel/liveupdate/Kconfig
@@ -1,12 +1,12 @@
# SPDX-License-Identifier: GPL-2.0-only
menu "Live Update and Kexec HandOver"
- depends on !DEFERRED_STRUCT_PAGE_INIT
+ depends on !DEFERRED_STRUCT_PAGE_INIT || COMPILE_TEST
config KEXEC_HANDOVER
bool "kexec handover"
depends on ARCH_SUPPORTS_KEXEC_HANDOVER && ARCH_SUPPORTS_KEXEC_FILE
- depends on !DEFERRED_STRUCT_PAGE_INIT
+ depends on !DEFERRED_STRUCT_PAGE_INIT || COMPILE_TEST
select MEMBLOCK_KHO_SCRATCH
select KEXEC_FILE
select LIBFDT
--
2.51.0On Fri, Feb 06, 2026 at 04:52:44PM -0500, Sasha Levin wrote: > Currently allmodconfig sets CONFIG_DEFERRED_STRUCT_PAGE_INIT which prevents KHO > from building. > > Signed-off-by: Sasha Levin <sashal@kernel.org> Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org> > --- > Changes since v1: > - Only add COMPILE_TEST to the DEFERRED_STRUCT_PAGE_INIT guards. > > kernel/liveupdate/Kconfig | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/kernel/liveupdate/Kconfig b/kernel/liveupdate/Kconfig > index d2aeaf13c3acb..a5d5391e9cf76 100644 > --- a/kernel/liveupdate/Kconfig > +++ b/kernel/liveupdate/Kconfig > @@ -1,12 +1,12 @@ > # SPDX-License-Identifier: GPL-2.0-only > > menu "Live Update and Kexec HandOver" > - depends on !DEFERRED_STRUCT_PAGE_INIT > + depends on !DEFERRED_STRUCT_PAGE_INIT || COMPILE_TEST > > config KEXEC_HANDOVER > bool "kexec handover" > depends on ARCH_SUPPORTS_KEXEC_HANDOVER && ARCH_SUPPORTS_KEXEC_FILE > - depends on !DEFERRED_STRUCT_PAGE_INIT > + depends on !DEFERRED_STRUCT_PAGE_INIT || COMPILE_TEST > select MEMBLOCK_KHO_SCRATCH > select KEXEC_FILE > select LIBFDT > -- > 2.51.0 > -- Sincerely yours, Mike.
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