[RFC] treewide: cleanup unreachable breaks

Tom Rix trix at redhat.com
Tue Oct 20 10:09:23 EDT 2020

On 10/19/20 4:05 PM, Jason Gunthorpe wrote:
> On Mon, Oct 19, 2020 at 12:42:15PM -0700, Nick Desaulniers wrote:
>> On Sat, Oct 17, 2020 at 10:43 PM Greg KH <gregkh at linuxfoundation.org> wrote:
>>> On Sat, Oct 17, 2020 at 09:09:28AM -0700, trix at redhat.com wrote:
>>>> From: Tom Rix <trix at redhat.com>
>>>> This is a upcoming change to clean up a new warning treewide.
>>>> I am wondering if the change could be one mega patch (see below) or
>>>> normal patch per file about 100 patches or somewhere half way by collecting
>>>> early acks.
>>> Please break it up into one-patch-per-subsystem, like normal, and get it
>>> merged that way.
>>> Sending us a patch, without even a diffstat to review, isn't going to
>>> get you very far...
>> Tom,
>> If you're able to automate this cleanup, I suggest checking in a
>> script that can be run on a directory.  Then for each subsystem you
>> can say in your commit "I ran scripts/fix_whatever.py on this subdir."
>>  Then others can help you drive the tree wide cleanup.  Then we can
>> enable -Wunreachable-code-break either by default, or W=2 right now
>> might be a good idea.
> I remember using clang-modernize in the past to fix issues very
> similar to this, if clang machinery can generate the warning, can't
> something like clang-tidy directly generate the patch?

Yes clang-tidy and similar are good tools.

Sometimes they change too much and your time shifts

from editing to analyzing and dropping changes.

I am looking at them for auto changing api.

When i have something greater than half baked i will post.


> You can send me a patch for drivers/infiniband/* as well
> Thanks,
> Jason

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