[PATCH RFC v2] riscv: Use 64-bit variable for output in __get_user_asm

[Nathan Chancellor]

On Wed, Jan 14, 2026 at 06:02:46PM -0700, Paul Walmsley wrote:
> I'm assuming this would be a temporary patch, and that we might be able to 
> remove it at some point (years, I guess?)

Yes, ideally this would be short lived but unfortunately, I am not
really sure what the plan to fix this on the LLVM side is :/ Maybe Craig
or Bill can comment on that.

> Might be worth adding a comment in the code to explain why a temporary 
> variable is needed.

I will insert:

/*
 * Use a temporary variable for the output of the asm goto to avoid a
 * triggering an LLVM assertion due to sign extending the output when
 * it is used in function calls:
 * https://github.com/llvm/llvm-project/issues/143795
 */

I will send v3 either tomorrow or Monday.

Cheers,
Nathan