* David Hildenbrand [off-list ref] [250325 14:52]:

On 25.03.25 13:26, Peter Zijlstra wrote:

quoted

On Tue, Mar 25, 2025 at 08:15:41AM -0400, guoren@kernel.org wrote:

quoted

From: "Guo Ren (Alibaba DAMO Academy)" <guoren@kernel.org>

Since 2001, the CONFIG_64BIT kernel has been built with the LP64 ABI,
but this patchset allows the CONFIG_64BIT kernel to use an ILP32 ABI

I'm thinking you're going to be finding a metric ton of assumptions
about 'unsigned long' being 64bit when 64BIT=y throughout the kernel.

I know of a couple of places where 64BIT will result in different math
such that a 32bit 'unsigned long' will trivially overflow.

Please, don't do this. This adds a significant maintenance burden on all
of us.

Fully agreed.

I would go further and say I do not want this to go in.

The open ended maintenance burden is not worth extending hardware life
of a board with 16mb of ram (If I understand your 2023 LPC slides
correctly).

Thank you,
Liam