powerpc/mm/hugetlb: Allow runtime allocation of 16G.

kvaneesh · mpe · commit 4ae279c2c96a · 2017-08-16T14:56:13.000+10:00
Now that we have GIGANTIC_PAGE enabled on powerpc, use this for 16G hugepages
with hash translation mode. Depending on the total system memory we have, we may
be able to allocate 16G hugepages runtime. This also remove the hugetlb setup
difference between hash/radix translation mode.

Signed-off-by: Aneesh Kumar K.V &lt;aneesh.kumar@linux.vnet.ibm.com&gt;
Signed-off-by: Michael Ellerman &lt;mpe@ellerman.id.au&gt;
diff --git a/arch/powerpc/include/asm/book3s/64/hugetlb.h b/arch/powerpc/include/asm/book3s/64/hugetlb.h
@@ -54,9 +54,7 @@ static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
 #ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE
 static inline bool gigantic_page_supported(void)
 {
-	if (radix_enabled())
-		return true;
-	return false;
+	return true;
 }
 #endif
 

Original file line number	Diff line number	Diff line change
`@@ -54,9 +54,7 @@ static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,`
`54`	`54`	`#ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE`
`55`	`55`	`static inline bool gigantic_page_supported(void)`
`56`	`56`	`{`
`57`		`- if (radix_enabled())`
`58`		`- return true;`
`59`		`- return false;`
	`57`	`+ return true;`
`60`	`58`	`}`
`61`	`59`	`#endif`
`62`	`60`