Denis Kirjanov [off-list ref] writes:

On 11/23/15, Aneesh Kumar K.V [off-list ref] wrote:

quoted

We support THP only with book3s_64 and 64K page size. Move
THP details to hash64-64k.h to clarify the same.

...

quoted

-static inline void hpte_do_hugepage_flush(struct mm_struct *mm,
-					  unsigned long addr, pmd_t *pmdp,
-					  unsigned long old_pmd)
-{
-
-	WARN(1, "%s called with THP disabled\n", __func__);

We can't reach this function with huge pages disabled, right?
Would it be better to use WARN_ON_ONCE?

Shouldn't matter, if should never get called and if we get called, them
something is really wrong, and mostly need a kernel fix. This will only
happen during devel mistakes.

-aneesh