[ammarfaizi2-block:google/android/kernel/common/android12-5.10 9986/9999] arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__x64_sys_process_mrelease'

From: kernel test robot
Date: Thu Jan 13 2022 - 07:36:51 EST

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tree: https://github.com/ammarfaizi2/linux-block google/android/kernel/common/android12-5.10
head: 87a74496ed4a51378b6b01606639d71113b040e5
commit: fe50dcab7ae21c88bdde199e04978903b3ebff4d [9986/9999] UPSTREAM: mm: wire up syscall process_mrelease
config: x86_64-randconfig-a011 (https://download.01.org/0day-ci/archive/20220113/202201132036.zLX4pFMK-lkp@xxxxxxxxx/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
# https://github.com/ammarfaizi2/linux-block/commit/fe50dcab7ae21c88bdde199e04978903b3ebff4d
git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
git fetch --no-tags ammarfaizi2-block google/android/kernel/common/android12-5.10
git checkout fe50dcab7ae21c88bdde199e04978903b3ebff4d
# save the config file to linux build tree
mkdir build_dir
make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

| ^~~~~~~~~~~~~~~~~~~
kernel/sys_ni.c:279:1: note: in expansion of macro 'COND_SYSCALL'
279 | COND_SYSCALL(mlockall);
| ^~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__x64_sys_munlockall' [-Wmissing-prototypes]
83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \
| ^~
arch/x86/include/asm/syscall_wrapper.h:100:2: note: in expansion of macro '__COND_SYSCALL'
100 | __COND_SYSCALL(x64, sys_##name)
| ^~~~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:256:2: note: in expansion of macro '__X64_COND_SYSCALL'
256 | __X64_COND_SYSCALL(name) \
| ^~~~~~~~~~~~~~~~~~
kernel/sys_ni.c:280:1: note: in expansion of macro 'COND_SYSCALL'
280 | COND_SYSCALL(munlockall);
| ^~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__ia32_sys_munlockall' [-Wmissing-prototypes]
83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \
| ^~
arch/x86/include/asm/syscall_wrapper.h:120:2: note: in expansion of macro '__COND_SYSCALL'
120 | __COND_SYSCALL(ia32, sys_##name)
| ^~~~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:257:2: note: in expansion of macro '__IA32_COND_SYSCALL'
257 | __IA32_COND_SYSCALL(name)
| ^~~~~~~~~~~~~~~~~~~
kernel/sys_ni.c:280:1: note: in expansion of macro 'COND_SYSCALL'
280 | COND_SYSCALL(munlockall);
| ^~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__x64_sys_mincore' [-Wmissing-prototypes]
83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \
| ^~
arch/x86/include/asm/syscall_wrapper.h:100:2: note: in expansion of macro '__COND_SYSCALL'
100 | __COND_SYSCALL(x64, sys_##name)
| ^~~~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:256:2: note: in expansion of macro '__X64_COND_SYSCALL'
256 | __X64_COND_SYSCALL(name) \
| ^~~~~~~~~~~~~~~~~~
kernel/sys_ni.c:281:1: note: in expansion of macro 'COND_SYSCALL'
281 | COND_SYSCALL(mincore);
| ^~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__ia32_sys_mincore' [-Wmissing-prototypes]
83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \
| ^~
arch/x86/include/asm/syscall_wrapper.h:120:2: note: in expansion of macro '__COND_SYSCALL'
120 | __COND_SYSCALL(ia32, sys_##name)
| ^~~~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:257:2: note: in expansion of macro '__IA32_COND_SYSCALL'
257 | __IA32_COND_SYSCALL(name)
| ^~~~~~~~~~~~~~~~~~~
kernel/sys_ni.c:281:1: note: in expansion of macro 'COND_SYSCALL'
281 | COND_SYSCALL(mincore);
| ^~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__x64_sys_madvise' [-Wmissing-prototypes]
83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \
| ^~
arch/x86/include/asm/syscall_wrapper.h:100:2: note: in expansion of macro '__COND_SYSCALL'
100 | __COND_SYSCALL(x64, sys_##name)
| ^~~~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:256:2: note: in expansion of macro '__X64_COND_SYSCALL'
256 | __X64_COND_SYSCALL(name) \
| ^~~~~~~~~~~~~~~~~~
kernel/sys_ni.c:282:1: note: in expansion of macro 'COND_SYSCALL'
282 | COND_SYSCALL(madvise);
| ^~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__ia32_sys_madvise' [-Wmissing-prototypes]
83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \
| ^~
arch/x86/include/asm/syscall_wrapper.h:120:2: note: in expansion of macro '__COND_SYSCALL'
120 | __COND_SYSCALL(ia32, sys_##name)
| ^~~~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:257:2: note: in expansion of macro '__IA32_COND_SYSCALL'
257 | __IA32_COND_SYSCALL(name)
| ^~~~~~~~~~~~~~~~~~~
kernel/sys_ni.c:282:1: note: in expansion of macro 'COND_SYSCALL'
282 | COND_SYSCALL(madvise);
| ^~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__x64_sys_process_madvise' [-Wmissing-prototypes]
83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \
| ^~
arch/x86/include/asm/syscall_wrapper.h:100:2: note: in expansion of macro '__COND_SYSCALL'
100 | __COND_SYSCALL(x64, sys_##name)
| ^~~~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:256:2: note: in expansion of macro '__X64_COND_SYSCALL'
256 | __X64_COND_SYSCALL(name) \
| ^~~~~~~~~~~~~~~~~~
kernel/sys_ni.c:283:1: note: in expansion of macro 'COND_SYSCALL'
283 | COND_SYSCALL(process_madvise);
| ^~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__ia32_sys_process_madvise' [-Wmissing-prototypes]
83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \
| ^~
arch/x86/include/asm/syscall_wrapper.h:120:2: note: in expansion of macro '__COND_SYSCALL'
120 | __COND_SYSCALL(ia32, sys_##name)
| ^~~~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:257:2: note: in expansion of macro '__IA32_COND_SYSCALL'
257 | __IA32_COND_SYSCALL(name)
| ^~~~~~~~~~~~~~~~~~~
kernel/sys_ni.c:283:1: note: in expansion of macro 'COND_SYSCALL'
283 | COND_SYSCALL(process_madvise);
| ^~~~~~~~~~~~
>> arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__x64_sys_process_mrelease' [-Wmissing-prototypes]
83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \
| ^~
arch/x86/include/asm/syscall_wrapper.h:100:2: note: in expansion of macro '__COND_SYSCALL'
100 | __COND_SYSCALL(x64, sys_##name)
| ^~~~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:256:2: note: in expansion of macro '__X64_COND_SYSCALL'
256 | __X64_COND_SYSCALL(name) \
| ^~~~~~~~~~~~~~~~~~
kernel/sys_ni.c:284:1: note: in expansion of macro 'COND_SYSCALL'
284 | COND_SYSCALL(process_mrelease);
| ^~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__ia32_sys_process_mrelease' [-Wmissing-prototypes]
83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \
| ^~
arch/x86/include/asm/syscall_wrapper.h:120:2: note: in expansion of macro '__COND_SYSCALL'
120 | __COND_SYSCALL(ia32, sys_##name)
| ^~~~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:257:2: note: in expansion of macro '__IA32_COND_SYSCALL'
257 | __IA32_COND_SYSCALL(name)
| ^~~~~~~~~~~~~~~~~~~
kernel/sys_ni.c:284:1: note: in expansion of macro 'COND_SYSCALL'
284 | COND_SYSCALL(process_mrelease);
| ^~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__x64_sys_remap_file_pages' [-Wmissing-prototypes]
83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \
| ^~
arch/x86/include/asm/syscall_wrapper.h:100:2: note: in expansion of macro '__COND_SYSCALL'
100 | __COND_SYSCALL(x64, sys_##name)
| ^~~~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:256:2: note: in expansion of macro '__X64_COND_SYSCALL'
256 | __X64_COND_SYSCALL(name) \
| ^~~~~~~~~~~~~~~~~~
kernel/sys_ni.c:285:1: note: in expansion of macro 'COND_SYSCALL'
285 | COND_SYSCALL(remap_file_pages);
| ^~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__ia32_sys_remap_file_pages' [-Wmissing-prototypes]
83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \
| ^~
arch/x86/include/asm/syscall_wrapper.h:120:2: note: in expansion of macro '__COND_SYSCALL'
120 | __COND_SYSCALL(ia32, sys_##name)
| ^~~~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:257:2: note: in expansion of macro '__IA32_COND_SYSCALL'
257 | __IA32_COND_SYSCALL(name)
| ^~~~~~~~~~~~~~~~~~~
kernel/sys_ni.c:285:1: note: in expansion of macro 'COND_SYSCALL'
285 | COND_SYSCALL(remap_file_pages);
| ^~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__x64_sys_mbind' [-Wmissing-prototypes]
83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \
| ^~
arch/x86/include/asm/syscall_wrapper.h:100:2: note: in expansion of macro '__COND_SYSCALL'
100 | __COND_SYSCALL(x64, sys_##name)
| ^~~~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:256:2: note: in expansion of macro '__X64_COND_SYSCALL'
256 | __X64_COND_SYSCALL(name) \
| ^~~~~~~~~~~~~~~~~~
kernel/sys_ni.c:286:1: note: in expansion of macro 'COND_SYSCALL'
286 | COND_SYSCALL(mbind);
| ^~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__ia32_sys_mbind' [-Wmissing-prototypes]
83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \
| ^~
arch/x86/include/asm/syscall_wrapper.h:120:2: note: in expansion of macro '__COND_SYSCALL'
120 | __COND_SYSCALL(ia32, sys_##name)
| ^~~~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:257:2: note: in expansion of macro '__IA32_COND_SYSCALL'
257 | __IA32_COND_SYSCALL(name)
| ^~~~~~~~~~~~~~~~~~~
kernel/sys_ni.c:286:1: note: in expansion of macro 'COND_SYSCALL'
286 | COND_SYSCALL(mbind);
| ^~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__ia32_compat_sys_mbind' [-Wmissing-prototypes]
83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \
| ^~
arch/x86/include/asm/syscall_wrapper.h:148:2: note: in expansion of macro '__COND_SYSCALL'
148 | __COND_SYSCALL(ia32, compat_sys_##name)
| ^~~~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:218:2: note: in expansion of macro '__IA32_COMPAT_COND_SYSCALL'
218 | __IA32_COMPAT_COND_SYSCALL(name) \
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
kernel/sys_ni.c:287:1: note: in expansion of macro 'COND_SYSCALL_COMPAT'
287 | COND_SYSCALL_COMPAT(mbind);
| ^~~~~~~~~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__x32_compat_sys_mbind' [-Wmissing-prototypes]
83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \
| ^~
arch/x86/include/asm/syscall_wrapper.h:175:2: note: in expansion of macro '__COND_SYSCALL'
175 | __COND_SYSCALL(x32, compat_sys_##name)
| ^~~~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:219:2: note: in expansion of macro '__X32_COMPAT_COND_SYSCALL'
219 | __X32_COMPAT_COND_SYSCALL(name)
| ^~~~~~~~~~~~~~~~~~~~~~~~~
kernel/sys_ni.c:287:1: note: in expansion of macro 'COND_SYSCALL_COMPAT'
287 | COND_SYSCALL_COMPAT(mbind);
| ^~~~~~~~~~~~~~~~~~~
arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__x64_sys_get_mempolicy' [-Wmissing-prototypes]
83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \
| ^~
arch/x86/include/asm/syscall_wrapper.h:100:2: note: in expansion of macro '__COND_SYSCALL'
100 | __COND_SYSCALL(x64, sys_##name)

vim +/__x64_sys_process_mrelease +83 arch/x86/include/asm/syscall_wrapper.h

cc42c045af1ff4 Brian Gerst 2020-03-13 13
25c619e59b395a Brian Gerst 2020-03-13 14 /*
25c619e59b395a Brian Gerst 2020-03-13 15 * Instead of the generic __SYSCALL_DEFINEx() definition, the x86 version takes
25c619e59b395a Brian Gerst 2020-03-13 16 * struct pt_regs *regs as the only argument of the syscall stub(s) named as:
25c619e59b395a Brian Gerst 2020-03-13 17 * __x64_sys_*() - 64-bit native syscall
25c619e59b395a Brian Gerst 2020-03-13 18 * __ia32_sys_*() - 32-bit native syscall or common compat syscall
25c619e59b395a Brian Gerst 2020-03-13 19 * __ia32_compat_sys_*() - 32-bit compat syscall
25c619e59b395a Brian Gerst 2020-03-13 20 * __x32_compat_sys_*() - 64-bit X32 compat syscall
25c619e59b395a Brian Gerst 2020-03-13 21 *
25c619e59b395a Brian Gerst 2020-03-13 22 * The registers are decoded according to the ABI:
25c619e59b395a Brian Gerst 2020-03-13 23 * 64-bit: RDI, RSI, RDX, R10, R8, R9
25c619e59b395a Brian Gerst 2020-03-13 24 * 32-bit: EBX, ECX, EDX, ESI, EDI, EBP
25c619e59b395a Brian Gerst 2020-03-13 25 *
25c619e59b395a Brian Gerst 2020-03-13 26 * The stub then passes the decoded arguments to the __se_sys_*() wrapper to
25c619e59b395a Brian Gerst 2020-03-13 27 * perform sign-extension (omitted for zero-argument syscalls). Finally the
25c619e59b395a Brian Gerst 2020-03-13 28 * arguments are passed to the __do_sys_*() function which is the actual
25c619e59b395a Brian Gerst 2020-03-13 29 * syscall. These wrappers are marked as inline so the compiler can optimize
25c619e59b395a Brian Gerst 2020-03-13 30 * the functions where appropriate.
25c619e59b395a Brian Gerst 2020-03-13 31 *
25c619e59b395a Brian Gerst 2020-03-13 32 * Example assembly (slightly re-ordered for better readability):
25c619e59b395a Brian Gerst 2020-03-13 33 *
25c619e59b395a Brian Gerst 2020-03-13 34 * <__x64_sys_recv>: <-- syscall with 4 parameters
25c619e59b395a Brian Gerst 2020-03-13 35 * callq <__fentry__>
25c619e59b395a Brian Gerst 2020-03-13 36 *
25c619e59b395a Brian Gerst 2020-03-13 37 * mov 0x70(%rdi),%rdi <-- decode regs->di
25c619e59b395a Brian Gerst 2020-03-13 38 * mov 0x68(%rdi),%rsi <-- decode regs->si
25c619e59b395a Brian Gerst 2020-03-13 39 * mov 0x60(%rdi),%rdx <-- decode regs->dx
25c619e59b395a Brian Gerst 2020-03-13 40 * mov 0x38(%rdi),%rcx <-- decode regs->r10
25c619e59b395a Brian Gerst 2020-03-13 41 *
25c619e59b395a Brian Gerst 2020-03-13 42 * xor %r9d,%r9d <-- clear %r9
25c619e59b395a Brian Gerst 2020-03-13 43 * xor %r8d,%r8d <-- clear %r8
25c619e59b395a Brian Gerst 2020-03-13 44 *
25c619e59b395a Brian Gerst 2020-03-13 45 * callq __sys_recvfrom <-- do the actual work in __sys_recvfrom()
25c619e59b395a Brian Gerst 2020-03-13 46 * which takes 6 arguments
25c619e59b395a Brian Gerst 2020-03-13 47 *
25c619e59b395a Brian Gerst 2020-03-13 48 * cltq <-- extend return value to 64-bit
25c619e59b395a Brian Gerst 2020-03-13 49 * retq <-- return
25c619e59b395a Brian Gerst 2020-03-13 50 *
25c619e59b395a Brian Gerst 2020-03-13 51 * This approach avoids leaking random user-provided register content down
25c619e59b395a Brian Gerst 2020-03-13 52 * the call chain.
25c619e59b395a Brian Gerst 2020-03-13 53 */
25c619e59b395a Brian Gerst 2020-03-13 54
ebeb8c82ffaf94 Dominik Brodowski 2018-04-05 55 /* Mapping of registers to parameters for syscalls on x86-64 and x32 */
ebeb8c82ffaf94 Dominik Brodowski 2018-04-05 56 #define SC_X86_64_REGS_TO_ARGS(x, ...) \
ebeb8c82ffaf94 Dominik Brodowski 2018-04-05 57 __MAP(x,__SC_ARGS \
ebeb8c82ffaf94 Dominik Brodowski 2018-04-05 58 ,,regs->di,,regs->si,,regs->dx \
ebeb8c82ffaf94 Dominik Brodowski 2018-04-05 59 ,,regs->r10,,regs->r8,,regs->r9) \
ebeb8c82ffaf94 Dominik Brodowski 2018-04-05 60
ebeb8c82ffaf94 Dominik Brodowski 2018-04-05 61 /* Mapping of registers to parameters for syscalls on i386 */
ebeb8c82ffaf94 Dominik Brodowski 2018-04-05 62 #define SC_IA32_REGS_TO_ARGS(x, ...) \
ebeb8c82ffaf94 Dominik Brodowski 2018-04-05 63 __MAP(x,__SC_ARGS \
ebeb8c82ffaf94 Dominik Brodowski 2018-04-05 64 ,,(unsigned int)regs->bx,,(unsigned int)regs->cx \
ebeb8c82ffaf94 Dominik Brodowski 2018-04-05 65 ,,(unsigned int)regs->dx,,(unsigned int)regs->si \
ebeb8c82ffaf94 Dominik Brodowski 2018-04-05 66 ,,(unsigned int)regs->di,,(unsigned int)regs->bp)
ebeb8c82ffaf94 Dominik Brodowski 2018-04-05 67
d2b5de495ee983 Brian Gerst 2020-03-13 68 #define __SYS_STUB0(abi, name) \
0f78ff17112d8b Brian Gerst 2020-03-13 69 long __##abi##_##name(const struct pt_regs *regs); \
d2b5de495ee983 Brian Gerst 2020-03-13 70 ALLOW_ERROR_INJECTION(__##abi##_##name, ERRNO); \
0f78ff17112d8b Brian Gerst 2020-03-13 71 long __##abi##_##name(const struct pt_regs *regs) \
d2b5de495ee983 Brian Gerst 2020-03-13 72 __alias(__do_##name);
d2b5de495ee983 Brian Gerst 2020-03-13 73
4399e0cf494f73 Brian Gerst 2020-03-13 74 #define __SYS_STUBx(abi, name, ...) \
0f78ff17112d8b Brian Gerst 2020-03-13 75 long __##abi##_##name(const struct pt_regs *regs); \
4399e0cf494f73 Brian Gerst 2020-03-13 76 ALLOW_ERROR_INJECTION(__##abi##_##name, ERRNO); \
0f78ff17112d8b Brian Gerst 2020-03-13 77 long __##abi##_##name(const struct pt_regs *regs) \
4399e0cf494f73 Brian Gerst 2020-03-13 78 { \
4399e0cf494f73 Brian Gerst 2020-03-13 79 return __se_##name(__VA_ARGS__); \
4399e0cf494f73 Brian Gerst 2020-03-13 80 }
4399e0cf494f73 Brian Gerst 2020-03-13 81
6cc8d2b286d9e7 Brian Gerst 2020-03-13 82 #define __COND_SYSCALL(abi, name) \
0f78ff17112d8b Brian Gerst 2020-03-13 @83 __weak long __##abi##_##name(const struct pt_regs *__unused) \
6cc8d2b286d9e7 Brian Gerst 2020-03-13 84 { \
6cc8d2b286d9e7 Brian Gerst 2020-03-13 85 return sys_ni_syscall(); \
6cc8d2b286d9e7 Brian Gerst 2020-03-13 86 }
6cc8d2b286d9e7 Brian Gerst 2020-03-13 87

:::::: The code at line 83 was first introduced by commit
:::::: 0f78ff17112d8b3469b805ff4ea9780cc1e5c93b x86/entry: Drop asmlinkage from syscalls

:::::: TO: Brian Gerst <brgerst@xxxxxxxxx>
:::::: CC: Thomas Gleixner <tglx@xxxxxxxxxxxxx>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

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