Re: [PATCH] kbuild: modpost: Warn about references from rodata to __init text

[Masahiro Yamada]

Hi Stephen, Rob,

2017-07-01 8:59 GMT+09:00 Rob Clark <robdclark@xxxxxxxxx>:
> On Fri, Jun 30, 2017 at 6:58 PM, Stephen Boyd <sboyd@xxxxxxxxxxxxxx> wrote:
>> If we have a structure that's marked const it will be placed
>> into the .rodata section but it could reference an init section
>> function. Include the read only data section in the check we have
>> for read/write data sections referencing init sections so we can
>> find this class of problems. This exposes quite a few places
>> where const marked structures are referencing __init functions and
>> __init data that we were previously ignoring.
>>
>> Cc: Rob Clark <robdclark@xxxxxxxxx>
>> Cc: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
>> Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
>> ---
>>
>> Making this change leads to quite a few other errors even on the
>> multi_v7_defconfig for ARM[1]. I still need to do a build of the
>> allmodconfig to see how many other errors there, but it seems to
>> be quite a few. I suppose those will need to be fixed before we can
>> merge this?
>
> thanks.. the explosions you get with these mistakes when building
> drivers as modules in a distro kernel config are quite "fun" to
> debug..
>
> I'm not quite sure about the rules for whether merging this would
> count as a regression, but I would argue those drivers are already
> broken, just no one noticed yet.  Similar to when a new gcc gets more
> clever about detecting bugs.  So I wouldn't be against merging this
> first to force drivers to fix their crap ;-)

I applied this, but this way seems unacceptable.
I cannot send a pull-req for this
unless most of the warnings are fixed.

Is there any activity for driver fixes?