[dpdk-dev] [PATCH v2 0/8] use GCC's C11 atomic builtins for test

[Honnappa Nagarahalli]

<snip>

> > >
> > > 18/06/2021 01:26, Honnappa Nagarahalli:
> > > > > On Tue, Jun 15, 2021 at 09:54:51PM -0500, Joyce Kong wrote:
> > > > > > Since C11 memory model is adopted in DPDK now[1], use GCC's
> > > > > > atomic builtins in test cases.
> > > > >
> > > > > as previously discussed these atomics are not "C11" they are
> > > > > direct use of gcc builtins. please don't incorporate C11 into
> > > > > the title of the patches or commit messages since it isn't.
> > > >
> > > > GCC supports 2 types of built-in atomics, __atomic_xxx[1] and
> > > > __sync_xxx [2].
> > > > We need a way to distinguish between them.
> > > > We are using "C11" as [1] says they match C++11 memory model.
> > >
> > > I agree it would be more correct to mention "compiler builtin"
> > > as it is not strictly the C11 API.
> > The log already mentions "GCC's C11 atomic builtins". I think that is correct
> enough and represents the change correctly.
> 
> it's misleading and does not attract the correct reviewers particularly due to
> prominence in the commit/mail subject.
> 
> please change it to "Use GCC atomic builtins" which describes clearly the
> actual change without ambiguity.  using "C11" implies the patch is adding
> code that uses C11 stdatomic.h and it doesn't.
As I mentioned earlier in this thread, GCC supports 2 types of atomics. "Use GCC atomic builtins" does not help distinguish between them. In "GCC's C11 atomic builtins" - "C11" indicates which atomics we are using, "atomic builtins" indicates that we are NOT using APIs from stdatomic.h