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Re: [PATCH] x86: suppress sparse warning in copy_to_user()

From "Jan Beulich" <JBeulich@suse.com>
Newsgroups linux.kernel
Subject Re: [PATCH] x86: suppress sparse warning in copy_to_user()
Date 2016-10-04 10:00 +0200
Message-ID <sosNP-87P-13@gated-at.bofh.it> (permalink)
References <sosut-7Z7-7@gated-at.bofh.it>
Organization linux.* mail to news gateway

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>>> On 04.10.16 at 09:33, <johannes@sipsolutions.net> wrote:
> From: Johannes Berg <johannes.berg@intel.com>
> 
> __compiletime_object_size() is simply defined to __builtin_object_size()
> which gcc declares with (void *, int type) prototype.

If that was the case, everyone should have seen such warnings from
the day the original patch got introduced. And the compiler warnings
I get when testing with all four combinations of const and volatile also
supports this by saying "expected 'const void *' but ..." (arguably the
compiler should accept volatile here too). To be honest, for code in
other trees where I'm maintainer, I'd reject such casting away of
constness, and demand the utility to get fixed instead.

Jan

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Thread

[PATCH] x86: suppress sparse warning in copy_to_user() Johannes Berg <johannes@sipsolutions.net> - 2016-10-04 09:40 +0200
  Re: [PATCH] x86: suppress sparse warning in copy_to_user() "Jan Beulich" <JBeulich@suse.com> - 2016-10-04 10:00 +0200
    Re: [PATCH] x86: suppress sparse warning in copy_to_user() Johannes Berg <johannes@sipsolutions.net> - 2016-10-04 10:10 +0200
      Re: [PATCH] x86: suppress sparse warning in copy_to_user() "Jan Beulich" <JBeulich@suse.com> - 2016-10-04 10:40 +0200
        Re: [PATCH] x86: suppress sparse warning in copy_to_user() Johannes Berg <johannes@sipsolutions.net> - 2016-10-04 10:50 +0200
          Re: [PATCH] x86: suppress sparse warning in copy_to_user() "Jan Beulich" <JBeulich@suse.com> - 2016-10-04 11:10 +0200

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