powerpc/mm/hugetlb: Update hugetlb related locks

[Michael Ellerman]

On Fri, 2018-06-01 at 08:24:24 UTC, "Aneesh Kumar K.V" wrote:
> With split pmd page table lock enabled, we don't use mm->page_table_lock when
> updating pmd entries. This patch update hugetlb path to use the right lock
> when inserting huge page directory entries into page table.
> 
> ex: if we are using hugepd and inserting hugepd entry at the pmd level, we
> use pmd_lockptr, which based on config can be split pmd lock.
> 
> For update huge page directory entries itself we use mm->page_table_lock. We
> do have a helper huge_pte_lockptr() for that.
> 
> Fixes: 675d99529 ("powerpc/book3s64: Enable split pmd ptlock")
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar at linux.ibm.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/ed515b6898c36775ddd99ff9ffeda4

cheers