On Wed, Jun 19, 2019 at 05:48:08PM +0300, Laurent Pinchart wrote:
> On Wed, Jun 19, 2019 at 11:39:02AM -0300, Mauro Carvalho Chehab wrote:

> > Specially on drivers that build with COMPILE_TEST[1], depending on the 
> > architecture they're built, false-positive warnings rise, specially
> > on unusual architecture with has different defines for some 
> > arch-specific typedefs (signed/unsigned, different integer type,
> > usage or not of volatile, a different address space, etc).

> All my kernel compilation scripts use -Werror, and that does a great job
> at catching problems. It can be a bit annoying at times when someone
> introduces a warning, but usually a fix will already be posted when I
> notice my build breaks. The more we use -Werror globally, the faster
> those new warnings will be caught.

-Werror is a bit user hostile, it can be incredibly irritating when
you're debugging things to get things like unused variable warnings from
your debug code or to be working with an unusual config/arch that throws
up warnings that aren't normally seen.  A clean build doesn't require us
to enable -Werror, it requires us to pay attention to warnings.