On Thursday, 12 June 2025 21:44:15 Central European Summer Time Jakub Kicinski wrote:

On Thu, 12 Jun 2025 20:56:03 +0200 Nicolas Frattaroli wrote:

quoted

Hardware of various vendors, but very notably Rockchip, often uses
32-bit registers where the upper 16-bit half of the register is a
write-enable mask for the lower half.

Please limit the spread of this weirdness to a rockchip or "hiword"
specific header. To a normal reader of bitfield.h these macros will
be equally confusing and useless.

That is how this change started out, and then a different maintainer told
me that this is a commonly used thing (see: the sunplus patch), and
Rockchip just happens to have a lot of these with consistent naming.

I believe normal readers of bitfield.h will be much more confused by the
undocumented concatenating macro soup at the end, but maybe that's just
me.

Best regards,
Nicolas Frattaroli