Re: [PATCH 0/2] x86: Use "er" asm constriant for add/sub

[Nicolas Pitre]

On Mon, 3 Aug 2026, David Laight wrote:

> The x86 instruction set only supports 32bit signed immediate values
> for add/sub.
> Replace the "ir" constraint with "er" to avoid build errors.
> 
> Found by a patch that added used mul_u64_add_u64_div_u64() to
> do a rounding divide by 2^32 (perhaps not the best way to do this).
> 
> A quick grep only found one other affected file.

Would be a good idea adding those cases to the test module.


Nicolas