Re: [Qemu-devel] [PATCH] Update QEMU checkpatch.pl to current linux version

[Hani Benhabiles <kroosec@gmail.com>]

On Tue, May 06, 2014 at 07:28:35PM +0100, Peter Maydell wrote:
> On 6 May 2014 19:16, Mike Day <ncmike@ncultra.org> wrote:
> > This updates scripts/checkpatch.pl to version 0.32. Also,
> > forward-ported the QEMU checks for no tabs and correct capitalization
> > of "QEMU." Finally, make --no-tree the default option since this will
> > be used with Qemu.
> >
> > Signed-off-by: Mike Day <ncmike@ncultra.org>
> > ---
> >
> > Notes: This is a huge patch and I needed to include white space
> > changes to get it applying cleanly.
> > I've tested this so far with some random patches off the mailing list
> > and some others that I've got around. I also tested for some intentional
> > errors.
> >
> >  scripts/checkpatch.pl | 2544 ++++++++++++++++++++++++++++++++++++++++---------
> >  1 file changed, 2120 insertions(+), 424 deletions(-)
> 
> I think this is going to be difficult to review, to say the least.
> 
> Where does your patch come from? Is the kernel's checkpatch.pl
> just a single commit between 0.31 and 0.32 (surely not) or
> a series of fixes?
> 
> A couple of ideas about how we could approach this:
>  (1) make a commit which is simply copying the kernel's 0.32
>       into our repo; then follow that with a series of commits which
>       re-apply our local changes.
>  (2) apply all the individual commits from the kernel between 0.31
>      and 0.32 to our repo
>  (3) give up and stick with 0.31...
> 
> (note that 1 and 2 here both end up with the same result as
> applying this patch, but with a different commit history to get
> there.)
> 
> We only have 16 commits which touch checkpatch.pl, so
> my favourite of these is (1). This also makes it easier when
> we want to upgrade to 0.33 some time in the future, I think.
> 
> It might also be helpful if you could describe the benefits
> we get from this update (any bugfixes for false positives we
> tend to run into? useful new checks?)

FWIW, this new version doesn't trigger a false positive I was having with
patches 05-07 in [1].

However, from a quick test for this patch on a couple of patches, I am getting
warnings like this: "WARNING: braces {} are not necessary for single statement
blocks" so there are still some Qemu related changes missing.

[1] https://lists.gnu.org/archive/html/qemu-devel/2014-04/msg04180.html