linux-kernel - Re: [GIT PULL] Wimplicit-fallthrough patches for 5.3-rc1

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Message-ID: <858bd3e0-ffc5-07e1-d1d9-37c3d2a1d595@embeddedor.com>
Date:   Thu, 18 Jul 2019 15:28:48 -0500
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Kees Cook <keescook@...omium.org>,
        Greg KH <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [GIT PULL] Wimplicit-fallthrough patches for 5.3-rc1



On 7/10/19 4:36 PM, Stephen Rothwell wrote:
> Hi Gustavo,
> 
> On Wed, 10 Jul 2019 13:14:10 -0500 "Gustavo A. R. Silva" <gustavo@...eddedor.com> wrote:
>>
>> At some point during this development cycle, we reached the quota of zero
>> fall-through warnings, but people continued introducing such warnings. So,
>> it seems we are now pretty much ready for enabling -Wimplicit-fallthrough
>> globally. Before it turns into a never ending story. :)
> 
> Sounds good to me.  My mail was, I guess, just a heads up to Linus that
> he will see some new warnings in his test build if he merges your
> tree.  Thanks for addressing them.
> 
Yep. Thanks, Stephen.

Linus:

After you have merged all the trees containing fall-through patches, you might
see the following warnings:

arch/x86/events/intel/core.c:4957:8: warning: this statement may fall through [-Wimplicit-fallthrough=]
arch/x86/events/intel/core.c:5006:8: warning: this statement may fall through [-Wimplicit-fallthrough=]
drivers/mtd/nand/onenand/onenand_base.c:3261:6: warning: this statement may fall through [-Wimplicit-fallthrough=]

for which I already have patches ready to be applied, but I didn't include them
in my pull-request because such patches don't apply to 5.2-rc2, on which I based
my -next tree for v5.3.

We can coordinate and I can send you the patches that address those and any other
warning that you might see after merging my pull-request and just before you release
5.3-rc1. So we can have the -Wimplicit-fallthrough option globally enabled in
5.3-rc1 and zero fall-through warnings.

What do you think?

Thanks
--
Gustavo