Re: [PATCH -next 005/491] ARM/UNIPHIER ARCHITECTURE: Use fallthrough;

[Joe Perches]

On Thu, 2020-03-12 at 18:02 +0900, Masahiro Yamada wrote:
> On Thu, Mar 12, 2020 at 5:56 PM Greg Kroah-Hartman
> <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
> > On Wed, Mar 11, 2020 at 07:31:07AM -0700, Joe Perches wrote:
> > > On Wed, 2020-03-11 at 14:15 +0900, Masahiro Yamada wrote:
> > > > On Wed, Mar 11, 2020 at 2:07 PM Joe Perches <joe@xxxxxxxxxxx> wrote:
> > > > > Convert the various uses of fallthrough comments to fallthrough;
> > > > > 
> > > > > Done via script
> > > > > Link: https://lore.kernel.org/lkml/b56602fcf79f849e733e7b521bb0e17895d390fa.1582230379.git.joe.com/
> > > > > 
> > > > > Signed-off-by: Joe Perches <joe@xxxxxxxxxxx>
> > > > 
> > > > Acked-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
> > > > 
> > > > 
> > > > But, I think the patch subject should be prefixed:
> > > > "serial: 8250_uniphier:"
> > > 
> > > Yeah thanks, that's difficult to script though.
> > > 
> > > 
> > 
> > Kernel development is hard :)
> 
> It is strange to process this per-platform
> and to send out a giant series that
> consists of 491 patches.
> 
> This is very trivial conversion.
> 
> I think it is better to have a single patch
> to convert all files under drivers/tty/serial/,
> with the patch subject "serial:".

The difficulty there is determining where these
subsystem spanning blocks should begin and end.

That could not be done for instance with drivers/net.

As I have suggested a few times, better still
would be to have a mechanism for scripted patches
applied possibly as single treewide patch.

Likely applied only at an -rc1.

The stated negatives to a treewide mechanism
have been difficulty to backport to -stable.

Perhaps a mechanism like

	git format-patch --stdout <treewide_commit_to_backport> | \
	git apply --include=<specific_files>

with some automated rewrite of the treewide patch subject
then commit could help.