On Thu, Feb 24, 2022 at 7:07 AM Sai Prakash Ranjan <quic_saipraka@xxxxxxxxxxx> wrote: > > Fix -Woverflow warnings for drm/meson driver which is a result > of moving arm64 custom MMIO accessor macros to asm-generic function > implementations giving a bonus type-checking now and uncovering these > overflow warnings. > > drivers/gpu/drm/meson/meson_viu.c: In function ‘meson_viu_init’: > drivers/gpu/drm/meson/meson_registers.h:1826:48: error: large integer implicitly truncated to unsigned type [-Werror=overflow] > #define VIU_OSD_BLEND_REORDER(dest, src) ((src) << (dest * 4)) > ^ > drivers/gpu/drm/meson/meson_viu.c:472:18: note: in expansion of macro ‘VIU_OSD_BLEND_REORDER’ > writel_relaxed(VIU_OSD_BLEND_REORDER(0, 1) | > ^~~~~~~~~~~~~~~~~~~~~ > > Cc: Arnd Bergmann <arnd@xxxxxxxx> > Cc: Neil Armstrong <narmstrong@xxxxxxxxxxxx> > Reported-by: kernel test robot <lkp@xxxxxxxxx> > Signed-off-by: Sai Prakash Ranjan <quic_saipraka@xxxxxxxxxxx> Reviewed-by: Arnd Bergmann <arnd@xxxxxxxx> It took me a bit to understand why we got the warning in the first place, but I should have just read the patch description, it's all there....
