Hi Sam,
On Thu, Jul 29, 2021 at 06:53:33PM +0200, Sam Ravnborg wrote:
On Wed, Jul 28, 2021 at 06:37:29PM +0300, Laurent Pinchart wrote:
Hello,
This patch series stems from subsystem-wide changes I wanted to compile-test with an ARM64 cross-compiler. My laziness to fire a 32-bit ARM build probably resulted in more time being spent writing these patches, but hopefully they'll turn out to be useful for more people :-)
Patches 1/7 and 2/7 are fixes for compilation warnings on 64-bit platforms in the omapdrm and sti-drm drivers. They are a dependency for the Kconfig changes that follow to avoid introducing build warnings, but could also be merged before.
Patches 3/7 to 7/7 enable compilation of the imx-dcss, omapdrm, sti-drm, tegra-drm and tilcdc drivers on ARM64 with COMPILE_TEST. The patches are independent from each other, so they can be picked by their respective maintainers.
We could also extend test compilation to more architecture, but I didn't want to remove all dependencies on ARM or ARM64 at this point for fear or triggering build warnings that I wouldn't be able to catch locally. If there's a consensus that fully relaxing the platform requirement is better, I can submit a new version that does so and rely on the 0day bot to catch issues.
I have alpha, sparc64, and a few more so we can get pretty good coverage before it hits -next.
It seems that the consensus is to enable COMPILE_TEST on all platforms, so I'll do that.
If we enable more build coverage then please address all W=1 warnings first.
I for once always builds with W=1 these days, and I see more and more warnings sneaking in again. So lets try to keep the noise level down.
Hmmmm... I build my kernel with -Werror to make sure I catch all warnings. W=1 doesn't play well with that :-S I'll see if I can turn the additional warnings into non-errors, but that may become a game of whack-a-mole.