Re: [PATCH v2] refcount: Create unchecked atomic_t implementation

From	Kees Cook <keescook@chromium.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH v2] refcount: Create unchecked atomic_t implementation
Date	2017-06-20 06:50 +0200
Message-ID	<tUjh0-3VF-21@gated-at.bofh.it> (permalink)
References	<tPVPX-6Nn-3@gated-at.bofh.it> <tPYEa-d6-7@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Wed, Jun 7, 2017 at 10:56 PM, Greg KH <gregkh@linuxfoundation.org> wrote:
> On Wed, Jun 07, 2017 at 07:58:31PM -0700, Kees Cook wrote:
>> Many subsystems will not use refcount_t unless there is a way to build the
>> kernel so that there is no regression in speed compared to atomic_t. This
>> adds CONFIG_REFCOUNT_FULL to enable the full refcount_t implementation
>> which has the validation but is slightly slower. When not enabled,
>> refcount_t uses the basic unchecked atomic_t routines, which results in
>> no code changes compared to just using atomic_t directly.
>>
>> Signed-off-by: Kees Cook <keescook@chromium.org>
>
> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Ping. tip maintainers, can you please take this patch to unblock the
refcount_t conversions?

Thanks!

-Kees

-- 
Kees Cook
Pixel Security

Thread

[PATCH v2] refcount: Create unchecked atomic_t implementation Kees Cook <keescook@chromium.org> - 2017-06-08 05:00 +0200
  Re: [PATCH v2] refcount: Create unchecked atomic_t implementation Greg KH <gregkh@linuxfoundation.org> - 2017-06-08 08:00 +0200
    Re: [PATCH v2] refcount: Create unchecked atomic_t implementation Kees Cook <keescook@chromium.org> - 2017-06-20 06:50 +0200
  Re: [PATCH v2] refcount: Create unchecked atomic_t implementation Christoph Hellwig <hch@infradead.org> - 2017-06-08 09:00 +0200
    RE: [PATCH v2] refcount: Create unchecked atomic_t implementation "Reshetova, Elena" <elena.reshetova@intel.com> - 2017-06-08 10:00 +0200
      Re: [PATCH v2] refcount: Create unchecked atomic_t implementation Davidlohr Bueso <dave@stgolabs.net> - 2017-06-08 22:10 +0200
        Re: [PATCH v2] refcount: Create unchecked atomic_t implementation Manfred Spraul <manfred@colorfullife.com> - 2017-06-09 06:30 +0200
          Re: [PATCH v2] refcount: Create unchecked atomic_t implementation Peter Zijlstra <peterz@infradead.org> - 2017-06-09 09:30 +0200
  Re: [PATCH v2] refcount: Create unchecked atomic_t implementation Ingo Molnar <mingo@kernel.org> - 2017-06-21 12:00 +0200

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