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Re: [PATCH] mac80211: Fix clang warning about constant operand in logical operation

From Johannes Berg <johannes@sipsolutions.net>
Newsgroups linux.kernel
Subject Re: [PATCH] mac80211: Fix clang warning about constant operand in logical operation
Date 2017-04-07 01:00 +0200
Message-ID <ttoxH-76X-1@gated-at.bofh.it> (permalink)
References (2 earlier) <ttlgu-54H-27@gated-at.bofh.it> <ttmYV-6fl-5@gated-at.bofh.it> <ttoo1-73j-5@gated-at.bofh.it> <ttoxH-76X-3@gated-at.bofh.it> <ttoo1-73j-5@gated-at.bofh.it>
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On Thu, 2017-04-06 at 15:42 -0700, Matthias Kaehlcke wrote:
> 
> Thanks, it would also require to move the initialization of
> ieee80211_default_rc_algo into an ifdef. If you can live with such a
> solution I'm happy to change it.

I think that'd be something I can live with, yeah.

> > 	git grep 'IS_ENABLED(' | grep '&&'
> 
> Indeed the warning is not triggered by these constructs. It seems
> clang only emits the warning when the constant operand is not
> boolean.

That points to just adding "> 0" to the condition here as another
alternative solution, I guess? With a comment to make sure it's not
removed again, that'd seem like the best thing to do.

johannes

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Thread

[PATCH] mac80211: Fix clang warning about constant operand in logical operation Matthias Kaehlcke <mka@chromium.org> - 2017-04-06 21:00 +0200
  Re: [PATCH] mac80211: Fix clang warning about constant operand in  logical operation Johannes Berg <johannes@sipsolutions.net> - 2017-04-06 21:20 +0200
    Re: [PATCH] mac80211: Fix clang warning about constant operand in  logical operation Matthias Kaehlcke <mka@chromium.org> - 2017-04-06 21:30 +0200
      Re: [PATCH] mac80211: Fix clang warning about constant operand in  logical operation Johannes Berg <johannes@sipsolutions.net> - 2017-04-06 23:20 +0200
        Re: [PATCH] mac80211: Fix clang warning about constant operand in  logical operation Matthias Kaehlcke <mka@chromium.org> - 2017-04-07 00:50 +0200
          Re: [PATCH] mac80211: Fix clang warning about constant operand in  logical operation Johannes Berg <johannes@sipsolutions.net> - 2017-04-07 01:00 +0200
            Re: [PATCH] mac80211: Fix clang warning about constant operand in  logical operation Matthias Kaehlcke <mka@chromium.org> - 2017-04-07 01:10 +0200
  RE: [PATCH] mac80211: Fix clang warning about constant operand in  logical operation David Laight <David.Laight@ACULAB.COM> - 2017-04-10 16:20 +0200

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