[PATCH] powerpc/32: Preserve cr1 in exception prolog stack check to fix build error

[Michael Ellerman]

On Mon, 8 Feb 2021 07:17:40 +0000 (UTC), Christophe Leroy wrote:
> THREAD_ALIGN_SHIFT = THREAD_SHIFT + 1 = PAGE_SHIFT + 1
> Maximum PAGE_SHIFT is 18 for 256k pages so
> THREAD_ALIGN_SHIFT is 19 at the maximum.
> 
> No need to clobber cr1, it can be preserved when moving r1
> into CR when we check stack overflow.
> 
> [...]

Applied to powerpc/next.

[1/1] powerpc/32: Preserve cr1 in exception prolog stack check to fix build error
      https://git.kernel.org/powerpc/c/3642eb21256a317ac14e9ed560242c6d20cf06d9

cheers