On 09/09/2016 10:31, Quentin Lambert wrote:
I have been trying to build and boot the last version available on linux-next.
During the build I am being prompted with "has no CRC!" warnings for a bunch
of modules.
Has a result I get the following lines in the Module.symvers:
[qlambert@sloth linux-next]$ grep 0x00000 Module.symvers
0x00000000 phys_base vmlinux EXPORT_SYMBOL
0x00000000 memmove vmlinux EXPORT_SYMBOL
0x00000000 __copy_user_nocache vmlinux EXPORT_SYMBOL
0x00000000 __get_user_4 vmlinux EXPORT_SYMBOL
0x00000000 __put_user_4 vmlinux EXPORT_SYMBOL
0x00000000 __memcpy vmlinux EXPORT_SYMBOL
0x00000000 __fentry__ vmlinux EXPORT_SYMBOL
0x00000000 memset vmlinux EXPORT_SYMBOL
0x00000000 __sw_hweight64 vmlinux EXPORT_SYMBOL
0x00000000 __sw_hweight32 vmlinux EXPORT_SYMBOL
0x00000000 memcpy_mcsafe_unrolled vmlinux EXPORT_SYMBOL_GPL
0x00000000 memcpy vmlinux EXPORT_SYMBOL
0x00000000 copy_user_enhanced_fast_string vmlinux EXPORT_SYMBOL
0x00000000 clear_page vmlinux EXPORT_SYMBOL
0x00000000 __put_user_2 vmlinux EXPORT_SYMBOL
0x00000000 __get_user_2 vmlinux EXPORT_SYMBOL
0x00000000 copy_page vmlinux EXPORT_SYMBOL
0x00000000 copy_user_generic_string vmlinux EXPORT_SYMBOL
0x00000000 _copy_to_user vmlinux EXPORT_SYMBOL
0x00000000 ___preempt_schedule vmlinux EXPORT_SYMBOL
0x00000000 __memmove vmlinux EXPORT_SYMBOL
0x00000000 empty_zero_page vmlinux EXPORT_SYMBOL
0x00000000 __get_user_8 vmlinux EXPORT_SYMBOL
0x00000000 __put_user_8 vmlinux EXPORT_SYMBOL
0x00000000 _copy_from_user vmlinux EXPORT_SYMBOL
0x00000000 native_load_gs_index vmlinux EXPORT_SYMBOL
0x00000000 __memset vmlinux EXPORT_SYMBOL
0x00000000 ___preempt_schedule_notrace vmlinux EXPORT_SYMBOL
0x00000000 __put_user_1 vmlinux EXPORT_SYMBOL
0x00000000 __get_user_1 vmlinux EXPORT_SYMBOL
0x00000000 copy_user_generic_unrolled vmlinux EXPORT_SYMBOL
If I ignore these and go on to boot the resulting kernel. I am left with:
ERROR: Unable to find root device 'UUID=<omitted>'
I am then dropped to a recovery shell where the keyboard is not answering.
The UUID is valid and is the same being used when I boot the HEAD of the linux
tree. In fact, I am sending this message from the same machine, running
that very kernel.
Prior to failing to find the root device, the kernel prints a series of
messages for each of the above symbol:
scsi_mod: no symbol version for <foo>
scsi_mod: Unknown symbol <foo> (err -22)
Therefore, I suspect that the missing CRC messages are linked to the issue.
I have git bisected this behavior to the patch 784d5699edd.
Simply reverting this patch results in different issues.
The errors I am having due to no CRC are fixed but I receive another error at
boot time:
failed command: WRITE LOG DMA EXT
I mostly asking for help as to what to do next.
Could someone point me toward documentation that would help me understand and
fix this issue?
I just wanted to add that I tried to compile the kernel on a different
machine and I received
the same warnings and error messages.
They both run Archlinux, so this may be a factor.
Quentin
