Subject: [PATCH v2 04/13] mm/debug_vm_pgtables/hugevmap: Use the arch helper to identify huge vmap support.

From: "Aneesh Kumar K.V" <[email-masked]>
Date: Wed, 19 Aug 2020 18:30:58 +0530

ppc64 supports huge vmap only with radix translation. Hence use arch helper
to determine the huge vmap support.

Signed-off-by: Aneesh Kumar K.V <[email-masked]>
---
 include/linux/io.h    | 12 ++++++++++++
 mm/debug_vm_pgtable.c |  4 ++--
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/include/linux/io.h b/include/linux/io.h
index 8394c56babc2..0b1ecda0cc86 100644
--- a/include/linux/io.h
+++ b/include/linux/io.h
@@ -38,6 +38,18 @@ int arch_ioremap_pud_supported(void);
 int arch_ioremap_pmd_supported(void);
 #else
 static inline void ioremap_huge_init(void) { }
+static inline int arch_ioremap_p4d_supported(void)
+{
+	return false;
+}
+static inline int arch_ioremap_pud_supported(void)
+{
+	return false;
+}
+static inline int arch_ioremap_pmd_supported(void)
+{
+	return false;
+}
 #endif
 
 /*
diff --git a/mm/debug_vm_pgtable.c b/mm/debug_vm_pgtable.c
index 57259e2dbd17..cf3c4792b4a2 100644
--- a/mm/debug_vm_pgtable.c
+++ b/mm/debug_vm_pgtable.c
@@ -206,7 +206,7 @@ static void __init pmd_huge_tests(pmd_t *pmdp, unsigned long pfn, pgprot_t prot)
 {
 	pmd_t pmd;
 
-	if (!IS_ENABLED(CONFIG_HAVE_ARCH_HUGE_VMAP))
+	if (!arch_ioremap_pmd_supported())
 		return;
 
 	pr_debug("Validating PMD huge\n");
@@ -320,7 +320,7 @@ static void __init pud_huge_tests(pud_t *pudp, unsigned long pfn, pgprot_t prot)
 {
 	pud_t pud;
 
-	if (!IS_ENABLED(CONFIG_HAVE_ARCH_HUGE_VMAP))
+	if (!arch_ioremap_pud_supported())
 		return;
 
 	pr_debug("Validating PUD huge\n");
-- 
2.26.2