Re: [PATCH 3/4] symbol namespaces: revert to previous __ksymtab name scheme

[Greg Kroah-Hartman]

On Thu, Oct 10, 2019 at 04:14:42PM +0100, Matthias Maennich wrote:
> The introduction Symbol Namespaces changed the naming schema of the
> __ksymtab entries from __kysmtab__symbol to __ksymtab_NAMESPACE.symbol.
> 
> That caused some breakages in tools that depend on the name layout in
> either the binaries(vmlinux,*.ko) or in System.map. E.g. kmod's depmod
> would not be able to read System.map without a patch to support symbol
> namespaces. A warning reported by depmod for namespaced symbols would
> look like
> 
>   depmod: WARNING: [...]/uas.ko needs unknown symbol usb_stor_adjust_quirks
> 
> In order to address this issue, revert to the original naming scheme and
> rather read the __kstrtabns_<symbol> entries and their corresponding
> values from __ksymtab_strings to update the namespace values for
> symbols. After having read all symbols and handled them in
> handle_modversions(), the symbols are created. In a second pass, read
> the __kstrtabns_ entries and update the namespaces accordingly.
> 
> Suggested-by: Jessica Yu <jeyu@xxxxxxxxxx>
> Fixes: 8651ec01daed ("module: add support for symbol namespaces.")
> Signed-off-by: Matthias Maennich <maennich@xxxxxxxxxx>

Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>