[PATCH] powerpc/hugetlb: Fix 512k hugepages on 8xx with 16k page size

[Michael Ellerman]

On Thu, 2020-02-06 at 13:50:28 UTC, Christophe Leroy wrote:
> Commit 55c8fc3f4930 ("powerpc/8xx: reintroduce 16K pages with HW
> assistance") redefined pte_t as a struct of 4 pte_basic_t, because
> in 16K pages mode there are four identical entries in the
> page table. But the size of hugepage tables is calculated based
> of the size of (void *). Therefore, we end up with page tables
> of size 1k instead of 4k for 512k pages.
> 
> As 512k hugepage tables are the same size as standard page tables,
> ie 4k, use the standard page tables instead of PGT_CACHE tables.
> 
> Fixes: 3fb69c6a1a13 ("powerpc/8xx: Enable 512k hugepage support with HW assistance")
> Cc: stable at vger.kernel.org
> Signed-off-by: Christophe Leroy <christophe.leroy at c-s.fr>

Applied to powerpc fixes, thanks.

https://git.kernel.org/powerpc/c/f2b67ef90b0d5eca0f2255e02cf2f620bc0ddcdb

cheers