[PATCH] arm64/migration: Define arm64_hugetlb_valid_size()

[Anshuman Khandual]

arch_hugetlb_valid_size() can be just factored out to create another helper
to be used in arch_hugetlb_migration_supported() as well. This just defines
arm64_hugetlb_migration_supported() for that purpose.

Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Signed-off-by: Anshuman Khandual <anshuman.khandual@xxxxxxx>
---
 arch/arm64/mm/hugetlbpage.c | 27 +++++++++++----------------
 1 file changed, 11 insertions(+), 16 deletions(-)

diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c
index ffb9c229610a..dcdc4c0c3bd8 100644
--- a/arch/arm64/mm/hugetlbpage.c
+++ b/arch/arm64/mm/hugetlbpage.c
@@ -56,24 +56,12 @@ void __init arm64_hugetlb_cma_reserve(void)
 }
 #endif /* CONFIG_CMA */
 
+static bool arm64_hugetlb_valid_size(unsigned long size);
+
 #ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
 bool arch_hugetlb_migration_supported(struct hstate *h)
 {
-	size_t pagesize = huge_page_size(h);
-
-	switch (pagesize) {
-#ifndef __PAGETABLE_PMD_FOLDED
-	case PUD_SIZE:
-		return pud_sect_supported();
-#endif
-	case PMD_SIZE:
-	case CONT_PMD_SIZE:
-	case CONT_PTE_SIZE:
-		return true;
-	}
-	pr_warn("%s: unrecognized huge page size 0x%lx\n",
-			__func__, pagesize);
-	return false;
+	return arm64_hugetlb_valid_size(huge_page_size(h));
 }
 #endif
 
@@ -504,7 +492,7 @@ static int __init hugetlbpage_init(void)
 }
 arch_initcall(hugetlbpage_init);
 
-bool __init arch_hugetlb_valid_size(unsigned long size)
+static bool arm64_hugetlb_valid_size(unsigned long size)
 {
 	switch (size) {
 #ifndef __PAGETABLE_PMD_FOLDED
@@ -517,5 +505,12 @@ bool __init arch_hugetlb_valid_size(unsigned long size)
 		return true;
 	}
 
+	pr_warn("%s: unrecognized huge page size 0x%lx\n",
+		__func__, size);
 	return false;
 }
+
+bool __init arch_hugetlb_valid_size(unsigned long size)
+{
+	return arm64_hugetlb_valid_size(size);
+}
-- 
2.20.1