On 2025/2/27 05:30, Rob Herring wrote:

Every time this code is touched, it breaks. This is not even the only
breakage right now[1].

quoted

2) IMO, the spec may be right.
   The type of size is enough to express any alignment wanted.
   For several kernel allocators. type of 'alignment' should be the type
   of 'size', NOT the type of 'address'

As I said previously, it can be argued either way.

Rob

[1] https://lore.kernel.org/all/20250226115044.zw44p5dxlhy5eoni@pengutronix.de/ (local)

this issue may be a downstream issue as well.

based on comments. they expects the CMA area is within 4G range.

but the wrong alloc-ranges config make the range (0x42000000 +
0xc0000000) > 4G across 4G boundary.