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McKenney" Cc: linux-kernel@vger.kernel.org Subject: [paulmck-rcu:dev.2026.09.18a] BUILD REGRESSION 90599c372e13369d11f6c1a01ff0094b16f72cf8 Message-ID: <202610010257.dob8K4fc-lkp@intel.com> User-Agent: s-nail v14.9.25 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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