[PATCH v5 4/4] printk: use the lockless ringbuffer

[John Ogness]

On 2020-08-11, Nick Desaulniers <ndesaulniers at google.com> wrote:
> From what I can tell, I think this patch ("printk: use the lockless
> ringbuffer") breaks lx-dmesg in CONFIG_GDB_SCRIPTS.
>
> (gdb) lx-dmesg
> Python Exception <class 'gdb.error'> No symbol "log_first_idx" in specified context.: 
> Error occurred in Python: No symbol "log_first_idx" in specified context.
>
> This command is used to dump the printk log buffer.
>
> It looks like the only places left in the kernel that reference are:
>
> - Documentation/admin-guide/kdump/gdbmacros.txt
> - Documentation/admin-guide/kdump/vmcoreinfo.rst
> - scripts/gdb/linux/dmesg.py
>
> I believe this commit removed log_first_idx, so all of the above
> probably need to be fixed up, too.

Thanks for pointing this out! I will get to work on a patch for this.

John Ogness