2024-03-18 13:28:15

by kernel test robot

[permalink] [raw]
Subject: WARNING: modpost: "cmpxchg8b_emu" [lib/test_lockup.ko] has no CRC!

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: f6cef5f8c37f58a3bc95b3754c3ae98e086631ca
commit: 88a2b4edda3d0709727be53f4423b0b832d91de3 x86/Kconfig: Rework CONFIG_X86_PAE dependency
date: 3 months ago
config: um-randconfig-r035-20230726 (https://download.01.org/0day-ci/archive/20240318/[email protected]/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240318/[email protected]/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 <[email protected]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/

All warnings (new ones prefixed by >>, old ones prefixed by <<):

WARNING: modpost: missing MODULE_DESCRIPTION() in vmlinux.o
WARNING: modpost: missing MODULE_DESCRIPTION() in kernel/rcu/rcuscale.o
WARNING: modpost: missing MODULE_DESCRIPTION() in kernel/backtracetest.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/nls_cp437.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/nls_cp775.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/nls_cp850.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/nls_cp852.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/nls_cp857.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/nls_cp861.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/nls_cp862.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/nls_cp865.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/nls_cp936.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/nls_cp1251.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/nls_iso8859-2.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/nls_iso8859-9.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/nls_iso8859-13.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/nls_iso8859-14.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/mac-celtic.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/mac-cyrillic.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/mac-gaelic.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/mac-greek.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/mac-iceland.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/mac-turkish.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/unicode/utf8-selftest.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/hostfs/hostfs.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/autofs/autofs4.o
WARNING: modpost: missing MODULE_DESCRIPTION() in crypto/cast_common.o
WARNING: modpost: missing MODULE_DESCRIPTION() in lib/crypto/libsha1.o
WARNING: modpost: missing MODULE_DESCRIPTION() in lib/find_bit_benchmark.o
WARNING: modpost: missing MODULE_DESCRIPTION() in lib/test_module.o
WARNING: modpost: missing MODULE_DESCRIPTION() in lib/test_user_copy.o
WARNING: modpost: missing MODULE_DESCRIPTION() in lib/test_static_keys.o
WARNING: modpost: missing MODULE_DESCRIPTION() in lib/test_static_key_base.o
WARNING: modpost: missing MODULE_DESCRIPTION() in lib/test_printf.o
WARNING: modpost: missing MODULE_DESCRIPTION() in lib/atomic64_test.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/virtio/virtio.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/virtio/virtio_ring.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/auxdisplay/charlcd.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/auxdisplay/hd44780_common.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/devfreq/governor_userspace.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/uio/uio.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/iio/buffer/kfifo_buf.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/fsi/fsi-core.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/fsi/fsi-master-hub.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/fsi/fsi-master-gpio.o
WARNING: modpost: EXPORT symbol "cmpxchg8b_emu" [vmlinux] version generation failed, symbol will not be versioned.
Is "cmpxchg8b_emu" prototyped in <asm/asm-prototypes.h>?
WARNING: modpost: EXPORT symbol "csum_partial" [vmlinux] version generation failed, symbol will not be versioned.
Is "csum_partial" prototyped in <asm/asm-prototypes.h>?
WARNING: modpost: EXPORT symbol "csum_partial_copy_generic" [vmlinux] version generation failed, symbol will not be versioned.
Is "csum_partial_copy_generic" prototyped in <asm/asm-prototypes.h>?
>> WARNING: modpost: "cmpxchg8b_emu" [lib/test_lockup.ko] has no CRC!
>> WARNING: modpost: "cmpxchg8b_emu" [lib/atomic64_test.ko] has no CRC!

--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki


2024-03-18 14:27:09

by Arnd Bergmann

[permalink] [raw]
Subject: Re: WARNING: modpost: "cmpxchg8b_emu" [lib/test_lockup.ko] has no CRC!

On Mon, Mar 18, 2024, at 14:27, kernel test robot wrote:
> tree:
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> master
> head: f6cef5f8c37f58a3bc95b3754c3ae98e086631ca
> commit: 88a2b4edda3d0709727be53f4423b0b832d91de3 x86/Kconfig: Rework
> CONFIG_X86_PAE dependency
> date: 3 months ago
> config: um-randconfig-r035-20230726

> WARNING: modpost: EXPORT symbol "cmpxchg8b_emu" [vmlinux] version
> generation failed, symbol will not be versioned.
> Is "cmpxchg8b_emu" prototyped in <asm/asm-prototypes.h>?
> WARNING: modpost: EXPORT symbol "csum_partial" [vmlinux] version
> generation failed, symbol will not be versioned.
> Is "csum_partial" prototyped in <asm/asm-prototypes.h>?
> WARNING: modpost: EXPORT symbol "csum_partial_copy_generic" [vmlinux]
> version generation failed, symbol will not be versioned.
> Is "csum_partial_copy_generic" prototyped in <asm/asm-prototypes.h>?
>>> WARNING: modpost: "cmpxchg8b_emu" [lib/test_lockup.ko] has no CRC!
>>> WARNING: modpost: "cmpxchg8b_emu" [lib/atomic64_test.ko] has no CRC!

I have not tested arch/um randconfig builds, but my guess is that
this was not actually introduced by my patch but rather lkp bisected
this into my commit because that changed the config in a way that
hides the preexisting bug on older kernels.

Arnd