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Message-ID: <202509200821.Qy7LYrJP-lkp@intel.com>
Date: Sat, 20 Sep 2025 08:46:11 +0800
From: kernel test robot <lkp@...el.com>
To: Adrian Barnaś <abarnas@...gle.com>,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc: oe-kbuild-all@...ts.linux.dev,
Adrian Barnaś <abarnas@...gle.com>,
Catalin Marinas <catalin.marinas@....com>,
Will Deacon <will@...nel.org>, Ard Biesheuvel <ardb@...nel.org>,
Dylan Hatch <dylanbhatch@...gle.com>,
Mark Rutland <mark.rutland@....com>,
Fanqin Cui <cuifq1@...natelecom.cn>
Subject: Re: [PATCH 2/2] arch: arm64: Reject modules with internal
alternative callbacks
Hi Adrian,
kernel test robot noticed the following build warnings:
[auto build test WARNING on arm/for-next]
[also build test WARNING on arm/fixes kvmarm/next soc/for-next linus/master v6.17-rc6 next-20250919]
[cannot apply to arm64/for-next/core]
[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/Adrian-Barna/arch-arm64-Fail-module-loading-if-dynamic-SCS-patching-fails/20250919-202643
base: git://git.armlinux.org.uk/~rmk/linux-arm.git for-next
patch link: https://lore.kernel.org/r/20250919122321.946462-3-abarnas%40google.com
patch subject: [PATCH 2/2] arch: arm64: Reject modules with internal alternative callbacks
config: arm64-allnoconfig (https://download.01.org/0day-ci/archive/20250920/202509200821.Qy7LYrJP-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250920/202509200821.Qy7LYrJP-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202509200821.Qy7LYrJP-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from arch/arm64/include/asm/sysreg.h:1111,
from arch/arm64/include/asm/cputype.h:250,
from arch/arm64/include/asm/cache.h:43,
from include/vdso/cache.h:5,
from include/linux/cache.h:6,
from include/linux/slab.h:15,
from include/linux/resource_ext.h:11,
from include/linux/acpi.h:13,
from include/acpi/apei.h:9,
from include/acpi/ghes.h:5,
from include/linux/arm_sdei.h:8,
from arch/arm64/kernel/asm-offsets.c:10:
arch/arm64/include/asm/alternative.h: In function 'apply_alternatives_module':
>> arch/arm64/include/asm/alternative.h:31:1: warning: no return statement in function returning non-void [-Wreturn-type]
31 | static inline int apply_alternatives_module(void *start, size_t length) { }
| ^~~~~~
--
In file included from arch/arm64/include/asm/sysreg.h:1111,
from arch/arm64/include/asm/memory.h:223,
from arch/arm64/include/asm/thread_info.h:17,
from include/linux/thread_info.h:60,
from arch/arm64/include/asm/preempt.h:6,
from include/linux/preempt.h:79,
from include/linux/spinlock.h:56,
from include/linux/wait.h:9,
from include/linux/wait_bit.h:8,
from include/linux/fs.h:7,
from arch/arm64/kernel/sys.c:11:
arch/arm64/include/asm/alternative.h: In function 'apply_alternatives_module':
>> arch/arm64/include/asm/alternative.h:31:1: warning: no return statement in function returning non-void [-Wreturn-type]
31 | static inline int apply_alternatives_module(void *start, size_t length) { }
| ^~~~~~
./arch/arm64/include/generated/asm/syscall_table_64.h: At top level:
arch/arm64/kernel/sys.c:58:40: warning: initialized field overwritten [-Woverride-init]
58 | #define __SYSCALL(nr, sym) [nr] = __arm64_##sym,
| ^~~~~~~~
arch/arm64/kernel/sys.c:51:52: note: in expansion of macro '__SYSCALL'
51 | #define __SYSCALL_WITH_COMPAT(nr, native, compat) __SYSCALL(nr, native)
| ^~~~~~~~~
./arch/arm64/include/generated/asm/syscall_table_64.h:1:1: note: in expansion of macro '__SYSCALL_WITH_COMPAT'
1 | __SYSCALL_WITH_COMPAT(0, sys_io_setup, compat_sys_io_setup)
| ^~~~~~~~~~~~~~~~~~~~~
arch/arm64/kernel/sys.c:58:40: note: (near initialization for 'sys_call_table[0]')
58 | #define __SYSCALL(nr, sym) [nr] = __arm64_##sym,
| ^~~~~~~~
arch/arm64/kernel/sys.c:51:52: note: in expansion of macro '__SYSCALL'
51 | #define __SYSCALL_WITH_COMPAT(nr, native, compat) __SYSCALL(nr, native)
| ^~~~~~~~~
./arch/arm64/include/generated/asm/syscall_table_64.h:1:1: note: in expansion of macro '__SYSCALL_WITH_COMPAT'
1 | __SYSCALL_WITH_COMPAT(0, sys_io_setup, compat_sys_io_setup)
| ^~~~~~~~~~~~~~~~~~~~~
arch/arm64/kernel/sys.c:58:40: warning: initialized field overwritten [-Woverride-init]
58 | #define __SYSCALL(nr, sym) [nr] = __arm64_##sym,
| ^~~~~~~~
./arch/arm64/include/generated/asm/syscall_table_64.h:2:1: note: in expansion of macro '__SYSCALL'
2 | __SYSCALL(1, sys_io_destroy)
| ^~~~~~~~~
arch/arm64/kernel/sys.c:58:40: note: (near initialization for 'sys_call_table[1]')
58 | #define __SYSCALL(nr, sym) [nr] = __arm64_##sym,
| ^~~~~~~~
./arch/arm64/include/generated/asm/syscall_table_64.h:2:1: note: in expansion of macro '__SYSCALL'
2 | __SYSCALL(1, sys_io_destroy)
| ^~~~~~~~~
arch/arm64/kernel/sys.c:58:40: warning: initialized field overwritten [-Woverride-init]
58 | #define __SYSCALL(nr, sym) [nr] = __arm64_##sym,
| ^~~~~~~~
arch/arm64/kernel/sys.c:51:52: note: in expansion of macro '__SYSCALL'
51 | #define __SYSCALL_WITH_COMPAT(nr, native, compat) __SYSCALL(nr, native)
| ^~~~~~~~~
./arch/arm64/include/generated/asm/syscall_table_64.h:3:1: note: in expansion of macro '__SYSCALL_WITH_COMPAT'
3 | __SYSCALL_WITH_COMPAT(2, sys_io_submit, compat_sys_io_submit)
| ^~~~~~~~~~~~~~~~~~~~~
arch/arm64/kernel/sys.c:58:40: note: (near initialization for 'sys_call_table[2]')
58 | #define __SYSCALL(nr, sym) [nr] = __arm64_##sym,
| ^~~~~~~~
arch/arm64/kernel/sys.c:51:52: note: in expansion of macro '__SYSCALL'
51 | #define __SYSCALL_WITH_COMPAT(nr, native, compat) __SYSCALL(nr, native)
| ^~~~~~~~~
./arch/arm64/include/generated/asm/syscall_table_64.h:3:1: note: in expansion of macro '__SYSCALL_WITH_COMPAT'
3 | __SYSCALL_WITH_COMPAT(2, sys_io_submit, compat_sys_io_submit)
| ^~~~~~~~~~~~~~~~~~~~~
arch/arm64/kernel/sys.c:58:40: warning: initialized field overwritten [-Woverride-init]
58 | #define __SYSCALL(nr, sym) [nr] = __arm64_##sym,
| ^~~~~~~~
./arch/arm64/include/generated/asm/syscall_table_64.h:4:1: note: in expansion of macro '__SYSCALL'
4 | __SYSCALL(3, sys_io_cancel)
| ^~~~~~~~~
arch/arm64/kernel/sys.c:58:40: note: (near initialization for 'sys_call_table[3]')
58 | #define __SYSCALL(nr, sym) [nr] = __arm64_##sym,
| ^~~~~~~~
./arch/arm64/include/generated/asm/syscall_table_64.h:4:1: note: in expansion of macro '__SYSCALL'
4 | __SYSCALL(3, sys_io_cancel)
| ^~~~~~~~~
arch/arm64/kernel/sys.c:58:40: warning: initialized field overwritten [-Woverride-init]
58 | #define __SYSCALL(nr, sym) [nr] = __arm64_##sym,
| ^~~~~~~~
./arch/arm64/include/generated/asm/syscall_table_64.h:5:1: note: in expansion of macro '__SYSCALL'
5 | __SYSCALL(4, sys_io_getevents)
| ^~~~~~~~~
arch/arm64/kernel/sys.c:58:40: note: (near initialization for 'sys_call_table[4]')
58 | #define __SYSCALL(nr, sym) [nr] = __arm64_##sym,
| ^~~~~~~~
./arch/arm64/include/generated/asm/syscall_table_64.h:5:1: note: in expansion of macro '__SYSCALL'
5 | __SYSCALL(4, sys_io_getevents)
| ^~~~~~~~~
arch/arm64/kernel/sys.c:58:40: warning: initialized field overwritten [-Woverride-init]
58 | #define __SYSCALL(nr, sym) [nr] = __arm64_##sym,
| ^~~~~~~~
./arch/arm64/include/generated/asm/syscall_table_64.h:6:1: note: in expansion of macro '__SYSCALL'
6 | __SYSCALL(5, sys_setxattr)
| ^~~~~~~~~
arch/arm64/kernel/sys.c:58:40: note: (near initialization for 'sys_call_table[5]')
58 | #define __SYSCALL(nr, sym) [nr] = __arm64_##sym,
| ^~~~~~~~
./arch/arm64/include/generated/asm/syscall_table_64.h:6:1: note: in expansion of macro '__SYSCALL'
6 | __SYSCALL(5, sys_setxattr)
| ^~~~~~~~~
arch/arm64/kernel/sys.c:58:40: warning: initialized field overwritten [-Woverride-init]
58 | #define __SYSCALL(nr, sym) [nr] = __arm64_##sym,
| ^~~~~~~~
./arch/arm64/include/generated/asm/syscall_table_64.h:7:1: note: in expansion of macro '__SYSCALL'
7 | __SYSCALL(6, sys_lsetxattr)
| ^~~~~~~~~
arch/arm64/kernel/sys.c:58:40: note: (near initialization for 'sys_call_table[6]')
58 | #define __SYSCALL(nr, sym) [nr] = __arm64_##sym,
| ^~~~~~~~
./arch/arm64/include/generated/asm/syscall_table_64.h:7:1: note: in expansion of macro '__SYSCALL'
7 | __SYSCALL(6, sys_lsetxattr)
| ^~~~~~~~~
arch/arm64/kernel/sys.c:58:40: warning: initialized field overwritten [-Woverride-init]
--
In file included from arch/arm64/include/asm/sysreg.h:1111,
from arch/arm64/include/asm/cputype.h:250,
from arch/arm64/include/asm/cache.h:43,
from include/vdso/cache.h:5,
from include/linux/cache.h:6,
from arch/arm64/include/asm/processor.h:29,
from include/linux/sched.h:13,
from include/linux/context_tracking.h:5,
from arch/arm64/kernel/traps.c:10:
arch/arm64/include/asm/alternative.h: In function 'apply_alternatives_module':
>> arch/arm64/include/asm/alternative.h:31:1: warning: no return statement in function returning non-void [-Wreturn-type]
31 | static inline int apply_alternatives_module(void *start, size_t length) { }
| ^~~~~~
arch/arm64/kernel/traps.c: At top level:
arch/arm64/kernel/traps.c:831:43: warning: initialized field overwritten [-Woverride-init]
831 | [ESR_ELx_EC_UNKNOWN] = "Unknown/Uncategorized",
| ^~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/kernel/traps.c:831:43: note: (near initialization for 'esr_class_str[0]')
arch/arm64/kernel/traps.c:832:43: warning: initialized field overwritten [-Woverride-init]
832 | [ESR_ELx_EC_WFx] = "WFI/WFE",
| ^~~~~~~~~
arch/arm64/kernel/traps.c:832:43: note: (near initialization for 'esr_class_str[1]')
arch/arm64/kernel/traps.c:833:43: warning: initialized field overwritten [-Woverride-init]
833 | [ESR_ELx_EC_CP15_32] = "CP15 MCR/MRC",
| ^~~~~~~~~~~~~~
arch/arm64/kernel/traps.c:833:43: note: (near initialization for 'esr_class_str[3]')
arch/arm64/kernel/traps.c:834:43: warning: initialized field overwritten [-Woverride-init]
834 | [ESR_ELx_EC_CP15_64] = "CP15 MCRR/MRRC",
| ^~~~~~~~~~~~~~~~
arch/arm64/kernel/traps.c:834:43: note: (near initialization for 'esr_class_str[4]')
arch/arm64/kernel/traps.c:835:43: warning: initialized field overwritten [-Woverride-init]
835 | [ESR_ELx_EC_CP14_MR] = "CP14 MCR/MRC",
| ^~~~~~~~~~~~~~
arch/arm64/kernel/traps.c:835:43: note: (near initialization for 'esr_class_str[5]')
arch/arm64/kernel/traps.c:836:43: warning: initialized field overwritten [-Woverride-init]
836 | [ESR_ELx_EC_CP14_LS] = "CP14 LDC/STC",
| ^~~~~~~~~~~~~~
arch/arm64/kernel/traps.c:836:43: note: (near initialization for 'esr_class_str[6]')
arch/arm64/kernel/traps.c:837:43: warning: initialized field overwritten [-Woverride-init]
837 | [ESR_ELx_EC_FP_ASIMD] = "ASIMD",
| ^~~~~~~
arch/arm64/kernel/traps.c:837:43: note: (near initialization for 'esr_class_str[7]')
arch/arm64/kernel/traps.c:838:43: warning: initialized field overwritten [-Woverride-init]
838 | [ESR_ELx_EC_CP10_ID] = "CP10 MRC/VMRS",
| ^~~~~~~~~~~~~~~
arch/arm64/kernel/traps.c:838:43: note: (near initialization for 'esr_class_str[8]')
arch/arm64/kernel/traps.c:839:43: warning: initialized field overwritten [-Woverride-init]
839 | [ESR_ELx_EC_PAC] = "PAC",
| ^~~~~
arch/arm64/kernel/traps.c:839:43: note: (near initialization for 'esr_class_str[9]')
arch/arm64/kernel/traps.c:840:43: warning: initialized field overwritten [-Woverride-init]
840 | [ESR_ELx_EC_CP14_64] = "CP14 MCRR/MRRC",
| ^~~~~~~~~~~~~~~~
arch/arm64/kernel/traps.c:840:43: note: (near initialization for 'esr_class_str[12]')
arch/arm64/kernel/traps.c:841:43: warning: initialized field overwritten [-Woverride-init]
841 | [ESR_ELx_EC_BTI] = "BTI",
| ^~~~~
arch/arm64/kernel/traps.c:841:43: note: (near initialization for 'esr_class_str[13]')
arch/arm64/kernel/traps.c:842:43: warning: initialized field overwritten [-Woverride-init]
842 | [ESR_ELx_EC_ILL] = "PSTATE.IL",
| ^~~~~~~~~~~
arch/arm64/kernel/traps.c:842:43: note: (near initialization for 'esr_class_str[14]')
arch/arm64/kernel/traps.c:843:43: warning: initialized field overwritten [-Woverride-init]
843 | [ESR_ELx_EC_SVC32] = "SVC (AArch32)",
| ^~~~~~~~~~~~~~~
arch/arm64/kernel/traps.c:843:43: note: (near initialization for 'esr_class_str[17]')
arch/arm64/kernel/traps.c:844:43: warning: initialized field overwritten [-Woverride-init]
844 | [ESR_ELx_EC_HVC32] = "HVC (AArch32)",
| ^~~~~~~~~~~~~~~
arch/arm64/kernel/traps.c:844:43: note: (near initialization for 'esr_class_str[18]')
arch/arm64/kernel/traps.c:845:43: warning: initialized field overwritten [-Woverride-init]
845 | [ESR_ELx_EC_SMC32] = "SMC (AArch32)",
| ^~~~~~~~~~~~~~~
arch/arm64/kernel/traps.c:845:43: note: (near initialization for 'esr_class_str[19]')
arch/arm64/kernel/traps.c:846:43: warning: initialized field overwritten [-Woverride-init]
846 | [ESR_ELx_EC_SVC64] = "SVC (AArch64)",
| ^~~~~~~~~~~~~~~
arch/arm64/kernel/traps.c:846:43: note: (near initialization for 'esr_class_str[21]')
arch/arm64/kernel/traps.c:847:43: warning: initialized field overwritten [-Woverride-init]
847 | [ESR_ELx_EC_HVC64] = "HVC (AArch64)",
| ^~~~~~~~~~~~~~~
arch/arm64/kernel/traps.c:847:43: note: (near initialization for 'esr_class_str[22]')
arch/arm64/kernel/traps.c:848:43: warning: initialized field overwritten [-Woverride-init]
848 | [ESR_ELx_EC_SMC64] = "SMC (AArch64)",
| ^~~~~~~~~~~~~~~
arch/arm64/kernel/traps.c:848:43: note: (near initialization for 'esr_class_str[23]')
arch/arm64/kernel/traps.c:849:43: warning: initialized field overwritten [-Woverride-init]
849 | [ESR_ELx_EC_SYS64] = "MSR/MRS (AArch64)",
| ^~~~~~~~~~~~~~~~~~~
arch/arm64/kernel/traps.c:849:43: note: (near initialization for 'esr_class_str[24]')
arch/arm64/kernel/traps.c:850:43: warning: initialized field overwritten [-Woverride-init]
850 | [ESR_ELx_EC_SVE] = "SVE",
| ^~~~~
arch/arm64/kernel/traps.c:850:43: note: (near initialization for 'esr_class_str[25]')
arch/arm64/kernel/traps.c:851:43: warning: initialized field overwritten [-Woverride-init]
851 | [ESR_ELx_EC_ERET] = "ERET/ERETAA/ERETAB",
| ^~~~~~~~~~~~~~~~~~~~
arch/arm64/kernel/traps.c:851:43: note: (near initialization for 'esr_class_str[26]')
arch/arm64/kernel/traps.c:852:43: warning: initialized field overwritten [-Woverride-init]
852 | [ESR_ELx_EC_FPAC] = "FPAC",
| ^~~~~~
arch/arm64/kernel/traps.c:852:43: note: (near initialization for 'esr_class_str[28]')
arch/arm64/kernel/traps.c:853:43: warning: initialized field overwritten [-Woverride-init]
853 | [ESR_ELx_EC_SME] = "SME",
| ^~~~~
arch/arm64/kernel/traps.c:853:43: note: (near initialization for 'esr_class_str[29]')
arch/arm64/kernel/traps.c:854:43: warning: initialized field overwritten [-Woverride-init]
854 | [ESR_ELx_EC_IMP_DEF] = "EL3 IMP DEF",
| ^~~~~~~~~~~~~
arch/arm64/kernel/traps.c:854:43: note: (near initialization for 'esr_class_str[31]')
arch/arm64/kernel/traps.c:855:43: warning: initialized field overwritten [-Woverride-init]
--
In file included from arch/arm64/include/asm/sysreg.h:1111,
from arch/arm64/include/asm/cputype.h:250,
from arch/arm64/include/asm/cache.h:43,
from include/vdso/cache.h:5,
from include/linux/cache.h:6,
from include/linux/slab.h:15,
from include/linux/resource_ext.h:11,
from include/linux/acpi.h:13,
from include/acpi/apei.h:9,
from include/acpi/ghes.h:5,
from include/linux/arm_sdei.h:8,
from arch/arm64/kernel/asm-offsets.c:10:
arch/arm64/include/asm/alternative.h: In function 'apply_alternatives_module':
>> arch/arm64/include/asm/alternative.h:31:1: warning: no return statement in function returning non-void [-Wreturn-type]
31 | static inline int apply_alternatives_module(void *start, size_t length) { }
| ^~~~~~
In file included from arch/arm64/include/asm/vdso/gettimeofday.h:10,
from include/vdso/datapage.h:197,
from lib/vdso/gettimeofday.c:5,
from <command-line>:
arch/arm64/include/asm/alternative.h: In function 'apply_alternatives_module':
>> arch/arm64/include/asm/alternative.h:31:1: warning: no return statement in function returning non-void [-Wreturn-type]
31 | static inline int apply_alternatives_module(void *start, size_t length) { }
| ^~~~~~
In file included from arch/arm64/include/asm/vdso/gettimeofday.h:10,
from include/vdso/datapage.h:197,
from lib/vdso/getrandom.c:8,
from <command-line>:
arch/arm64/include/asm/alternative.h: In function 'apply_alternatives_module':
>> arch/arm64/include/asm/alternative.h:31:1: warning: no return statement in function returning non-void [-Wreturn-type]
31 | static inline int apply_alternatives_module(void *start, size_t length) { }
| ^~~~~~
vim +31 arch/arm64/include/asm/alternative.h
27
28 #ifdef CONFIG_MODULES
29 int apply_alternatives_module(void *start, size_t length);
30 #else
> 31 static inline int apply_alternatives_module(void *start, size_t length) { }
32 #endif
33
--
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