* [paulmck-rcu:dev.2026.09.18a] BUILD REGRESSION 90599c372e13369d11f6c1a01ff0094b16f72cf8
@ 2026-09-30 18:07 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2026-09-30 18:07 UTC (permalink / raw)
To: Paul E. McKenney; +Cc: linux-kernel
tree/branch: https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev.2026.09.18a
branch HEAD: 90599c372e13369d11f6c1a01ff0094b16f72cf8 usb: mtu3: Fix double dereference in TP_printk
Error/Warning (recently discovered and may have been fixed):
https://lore.kernel.org/oe-kbuild-all/202609301117.nVKrDSkb-lkp@intel.com
https://lore.kernel.org/oe-kbuild-all/202610010054.roP05vYH-lkp@intel.com
ERROR: modpost: fs/btrfs/btrfs.ko: symbol 'cmpxchg_emu_u8' undefined!
bio.c:(.text+0x88c): undefined reference to `cmpxchg_emu_u8'
blk-crypto-fallback.c:(.text+0x10c): undefined reference to `cmpxchg_emu_u8'
block.c:(.text+0x300): undefined reference to `cmpxchg_emu_u8'
Error/Warning ids grouped by kconfigs:
recent_errors
|-- xtensa-randconfig-1000-20260929
| |-- bio.c:(.text):undefined-reference-to-cmpxchg_emu_u8
| |-- blk-crypto-fallback.c:(.text):undefined-reference-to-cmpxchg_emu_u8
| `-- block.c:(.text):undefined-reference-to-cmpxchg_emu_u8
`-- xtensa-randconfig-1001-20260930
`-- ERROR:fs-btrfs-btrfs.ko:symbol-cmpxchg_emu_u8-undefined
elapsed time: 1021m
configs tested: 235
configs skipped: 6
tested configs:
alpha allnoconfig gcc-16.1.0
alpha allyesconfig gcc-16.1.0
alpha defconfig gcc-16.1.0
alpha randconfig-r2300-20260930 gcc-8.5.0 sparse
arc allmodconfig clang-24
arc allnoconfig gcc-16.1.0
arc allyesconfig clang-24
arc defconfig gcc-16.1.0
arc randconfig-1000-20260930 gcc-11.5.0
arc randconfig-1001-20260930 gcc-11.5.0
arc randconfig-r2104-20260930 gcc-12 cocci
arm allnoconfig gcc-16.1.0
arm allyesconfig clang-24
arm defconfig gcc-16.1.0
arm dove_defconfig gcc-16.1.0
arm mvebu_v5_defconfig gcc-16.1.0
arm randconfig-1000-20260930 gcc-11.5.0
arm randconfig-1001-20260930 gcc-11.5.0
arm randconfig-1002-20260930 gcc-11.5.0
arm randconfig-1003-20260930 gcc-11.5.0
arm64 allmodconfig clang-24
arm64 allnoconfig gcc-16.1.0
arm64 defconfig gcc-16.1.0
arm64 randconfig-1000-20260930 gcc-16.1.0
arm64 randconfig-1001-20260930 gcc-16.1.0
arm64 randconfig-1002-20260930 gcc-16.1.0
arm64 randconfig-1003-20260930 gcc-16.1.0
csky allmodconfig gcc-16.1.0
csky allnoconfig gcc-16.1.0
csky defconfig gcc-16.1.0
csky randconfig-1000-20260930 gcc-16.1.0
csky randconfig-1001-20260930 gcc-16.1.0
csky randconfig-r2104-20260930 clang-24 cocci
csky randconfig-r2200-20260930 gcc-14.3.0 smatch
hexagon allmodconfig gcc-16.1.0
hexagon allnoconfig gcc-16.1.0
hexagon defconfig gcc-16.1.0
hexagon randconfig-1000-20260930 clang-24
hexagon randconfig-1001-20260930 clang-24
hexagon randconfig-r2106-20260930 clang-24 cocci
hexagon randconfig-r2304-20260930 gcc-8.5.0 sparse
i386 alldefconfig gcc-16.1.0
i386 allnoconfig gcc-16.1.0
i386 buildonly-randconfig-1000-20260930 gcc-14
i386 buildonly-randconfig-1001-20260930 gcc-14
i386 buildonly-randconfig-1002-20260930 gcc-14
i386 buildonly-randconfig-1003-20260930 gcc-14
i386 buildonly-randconfig-1004-20260930 gcc-14
i386 buildonly-randconfig-1005-20260930 gcc-14
i386 defconfig gcc-16.1.0
i386 randconfig-1000-20260930 gcc-14
i386 randconfig-1001-20260930 gcc-14
i386 randconfig-1002-20260930 gcc-14
i386 randconfig-1003-20260930 gcc-14
i386 randconfig-1004-20260930 gcc-14
i386 randconfig-1005-20260930 gcc-14
i386 randconfig-1006-20260930 gcc-14
i386 randconfig-1007-20260930 clang-22
i386 randconfig-1008-20260930 clang-22
i386 randconfig-1009-20260930 clang-22
i386 randconfig-1010-20260930 clang-22
i386 randconfig-1011-20260930 clang-22
i386 randconfig-1012-20260930 clang-22
i386 randconfig-1013-20260930 clang-22
i386 randconfig-2100-20260930 clang-22 cocci
i386 randconfig-2101-20260930 clang-22 cocci
i386 randconfig-2102-20260930 clang-22 cocci
i386 randconfig-2103-20260930 clang-22 cocci
i386 randconfig-2200-20260930 gcc-14 smatch
i386 randconfig-2300-20260930 gcc-13 sparse
i386 randconfig-2301-20260930 gcc-13 sparse
i386 randconfig-2302-20260930 gcc-13 sparse
i386 randconfig-r2100-20260930 clang-17 cocci
i386 randconfig-r2105-20260930 gcc-12 cocci
loongarch allmodconfig clang-24
loongarch allnoconfig gcc-16.1.0
loongarch defconfig clang-24
loongarch randconfig-1000-20260930 clang-24
loongarch randconfig-1001-20260930 clang-24
loongarch randconfig-r2102-20260930 gcc-9.5.0 cocci
loongarch randconfig-r2303-20260930 gcc-8.5.0 sparse
m68k allmodconfig gcc-16.1.0
m68k allnoconfig gcc-16.1.0
m68k allyesconfig clang-24
m68k defconfig clang-24
m68k randconfig-r2202-20260930 gcc-15.2.0 smatch
m68k virt_defconfig gcc-16.1.0
microblaze allnoconfig gcc-16.1.0
microblaze allyesconfig gcc-16.1.0
microblaze defconfig clang-24
microblaze randconfig-r2103-20260930 gcc-9.5.0 cocci
microblaze randconfig-r2305-20260930 gcc-8.5.0 sparse
mips allmodconfig gcc-16.1.0
mips allnoconfig gcc-16.1.0
mips allyesconfig gcc-16.1.0
mips bigsur_defconfig gcc-16.1.0
mips loongson2k_defconfig gcc-16.1.0
mips randconfig-r2102-20260930 clang-17 cocci
mips randconfig-r2103-20260930 clang-17 cocci
nios2 allmodconfig clang-20
nios2 allnoconfig clang-24
nios2 defconfig clang-24
nios2 randconfig-1000-20260930 clang-24
nios2 randconfig-1001-20260930 clang-24
nios2 randconfig-r2106-20260930 gcc-12 cocci
nios2 randconfig-r2201-20260930 gcc-11.5.0 smatch
openrisc allmodconfig clang-20
openrisc allnoconfig clang-24
openrisc defconfig gcc-16.1.0
openrisc randconfig-r2302-20260930 gcc-8.5.0 sparse
parisc allmodconfig gcc-16.1.0
parisc allnoconfig clang-24
parisc allyesconfig clang-17
parisc defconfig gcc-16.1.0
parisc randconfig-1000-20260930 gcc-8.5.0
parisc randconfig-1001-20260930 gcc-8.5.0
parisc randconfig-r2107-20260930 gcc-12 cocci
parisc randconfig-r2300-20260930 gcc-8.5.0 sparse
parisc64 defconfig clang-24
powerpc allmodconfig gcc-16.1.0
powerpc allnoconfig clang-24
powerpc randconfig-1000-20260930 gcc-8.5.0
powerpc randconfig-1001-20260930 gcc-8.5.0
powerpc randconfig-r2101-20260930 clang-17 cocci
powerpc randconfig-r2305-20260930 gcc-8.5.0 sparse
powerpc sequoia_defconfig gcc-16.1.0
powerpc64 randconfig-1000-20260930 gcc-8.5.0
powerpc64 randconfig-1001-20260930 gcc-8.5.0
powerpc64 randconfig-r2304-20260930 gcc-8.5.0 sparse
riscv allmodconfig clang-24
riscv allnoconfig clang-24
riscv allyesconfig clang-24
riscv defconfig gcc-16.1.0
riscv nommu_k210_defconfig gcc-16.1.0
riscv randconfig-1000-20260930 gcc-16.1.0
riscv randconfig-1001-20260930 gcc-16.1.0
riscv randconfig-2000-20260930 gcc-14.3.0
riscv randconfig-2001-20260930 gcc-14.3.0
s390 allmodconfig clang-17
s390 allnoconfig clang-24
s390 allyesconfig gcc-16.1.0
s390 defconfig gcc-16.1.0
s390 randconfig-1000-20260930 gcc-16.1.0
s390 randconfig-1001-20260930 gcc-16.1.0
s390 randconfig-2000-20260930 gcc-14.3.0
s390 randconfig-2001-20260930 gcc-14.3.0
s390 randconfig-r2105-20260930 clang-24 cocci
s390 randconfig-r2107-20260930 clang-24 cocci
sh allmodconfig gcc-16.1.0
sh allnoconfig clang-24
sh allyesconfig clang-17
sh defconfig gcc-14
sh randconfig-1000-20260930 gcc-16.1.0
sh randconfig-1001-20260930 gcc-16.1.0
sh randconfig-2000-20260930 gcc-14.3.0
sh randconfig-2001-20260930 gcc-14.3.0
sparc allnoconfig clang-24
sparc defconfig gcc-16.1.0
sparc randconfig-1000-20260930 clang-22
sparc randconfig-1001-20260930 clang-22
sparc randconfig-2000-20260930 gcc-10.5.0
sparc randconfig-2001-20260930 gcc-10.5.0
sparc randconfig-r2301-20260930 gcc-8.5.0 sparse
sparc64 allmodconfig clang-20
sparc64 defconfig gcc-14
sparc64 randconfig-1000-20260930 clang-22
sparc64 randconfig-1001-20260930 clang-22
sparc64 randconfig-2000-20260930 gcc-10.5.0
sparc64 randconfig-2001-20260930 gcc-10.5.0
um allmodconfig clang-17
um allnoconfig clang-24
um allyesconfig gcc-16.1.0
um defconfig gcc-14
um i386_defconfig gcc-14
um randconfig-1000-20260930 clang-22
um randconfig-1001-20260930 clang-22
um randconfig-2000-20260930 gcc-10.5.0
um randconfig-2001-20260930 gcc-10.5.0
um randconfig-r2200-20260930 clang-24 smatch
um randconfig-r2302-20260930 gcc-8.5.0 sparse
um randconfig-r2303-20260930 gcc-8.5.0 sparse
um x86_64_defconfig gcc-14
x86_64 allnoconfig clang-22 checkkconfigsymbols
x86_64 allnoconfig clang-24
x86_64 buildonly-randconfig-1000-20260930 clang-22
x86_64 buildonly-randconfig-1001-20260930 clang-22
x86_64 buildonly-randconfig-1002-20260930 clang-22
x86_64 buildonly-randconfig-1003-20260930 clang-22
x86_64 buildonly-randconfig-1004-20260930 clang-22
x86_64 buildonly-randconfig-1005-20260930 clang-22
x86_64 defconfig gcc-14
x86_64 kexec clang-22
x86_64 randconfig-1000-20260930 gcc-14
x86_64 randconfig-1001-20260930 gcc-14
x86_64 randconfig-1002-20260930 gcc-14
x86_64 randconfig-1003-20260930 gcc-14
x86_64 randconfig-1004-20260930 gcc-14
x86_64 randconfig-1005-20260930 gcc-14
x86_64 randconfig-1006-20260930 gcc-14
x86_64 randconfig-1007-20260930 gcc-14
x86_64 randconfig-1008-20260930 gcc-14
x86_64 randconfig-1009-20260930 gcc-14
x86_64 randconfig-1010-20260930 gcc-14
x86_64 randconfig-1011-20260930 gcc-14
x86_64 randconfig-1012-20260930 clang-22
x86_64 randconfig-1013-20260930 clang-22
x86_64 randconfig-1014-20260930 clang-22
x86_64 randconfig-1015-20260930 clang-22
x86_64 randconfig-1016-20260930 clang-22
x86_64 randconfig-1017-20260930 clang-22
x86_64 randconfig-2100-20260930 clang-22 cocci
x86_64 randconfig-2101-20260930 clang-22 cocci
x86_64 randconfig-2102-20260930 clang-22 cocci
x86_64 randconfig-2103-20260930 clang-22 cocci
x86_64 randconfig-2200-20260930 gcc-14 smatch
x86_64 randconfig-2300-20260930 gcc-13 sparse
x86_64 randconfig-2301-20260930 gcc-13 sparse
x86_64 randconfig-2302-20260930 gcc-13 sparse
x86_64 rhel-9.4 clang-22
x86_64 rhel-9.4-bpf clang-22
x86_64 rhel-9.4-func clang-22
x86_64 rhel-9.4-kselftests clang-22
x86_64 rhel-9.4-kunit clang-22
x86_64 rhel-9.4-ltp clang-22
x86_64 rhel-9.4-rust clang-22
x86_64 rhel-9.4-rust clang-22
xtensa allnoconfig clang-24
xtensa allyesconfig clang-20
xtensa randconfig-1000-20260930 clang-22
xtensa randconfig-1001-20260930 clang-22
xtensa randconfig-2000-20260930 gcc-10.5.0
xtensa randconfig-2001-20260930 gcc-10.5.0
xtensa randconfig-r2100-20260930 gcc-9.5.0 cocci
xtensa randconfig-r2101-20260930 gcc-9.5.0 cocci
xtensa randconfig-r2201-20260930 gcc-10.5.0 smatch
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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2026-09-30 18:07 [paulmck-rcu:dev.2026.09.18a] BUILD REGRESSION 90599c372e13369d11f6c1a01ff0094b16f72cf8 kernel test robot
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