quoted

quoted

  */
-#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+#ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE
 #include <asm/hugepage.h>
 #endif

This in wrong.  CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE is a just a glue toggle,
used only in Kconfig files (and not in any "C" code).  It enables generic Kconfig
code to allow visibility of CONFIG_TRANSPARENT_HUGEPAGE w/o every arch needing to
do a me too.

I think you need to use CONFIG_TRANSPARENT_HUGEPAGE to guard appropriate tests. I
understand that it only

We can probably replace CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE wrapper with
CONFIG_TRANSPARENT_HUGEPAGE. But CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
explicitly depends on CONFIG_TRANSPARENT_HUGEPAGE as a prerequisite. Could
you please confirm if the following change on this test will work on ARC
platform for both THP and !THP cases ? Thank you.

diff --git a/mm/debug_vm_pgtable.c b/mm/debug_vm_pgtable.c
index 621ac09..99ebc7c 100644
--- a/mm/debug_vm_pgtable.c
+++ b/mm/debug_vm_pgtable.c

@@ -67,7 +67,7 @@ static void __init pte_basic_tests(unsigned long pfn, pgprot_t prot)
 	WARN_ON(pte_write(pte_wrprotect(pte)));
 }
 
-#ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
 static void __init pmd_basic_tests(unsigned long pfn, pgprot_t prot)
 {
 	pmd_t pmd = pfn_pmd(pfn, prot);

@@ -85,9 +85,6 @@ static void __init pmd_basic_tests(unsigned long pfn, pgprot_t prot)
 	 */
 	WARN_ON(!pmd_bad(pmd_mkhuge(pmd)));
 }
-#else
-static void __init pmd_basic_tests(unsigned long pfn, pgprot_t prot) { }
-#endif
 
 #ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
 static void __init pud_basic_tests(unsigned long pfn, pgprot_t prot)

@@ -112,6 +109,10 @@ static void __init pud_basic_tests(unsigned long pfn, pgprot_t prot)
 #else
 static void __init pud_basic_tests(unsigned long pfn, pgprot_t prot) { }
 #endif
+#else
+static void __init pmd_basic_tests(unsigned long pfn, pgprot_t prot) { }
+static void __init pud_basic_tests(unsigned long pfn, pgprot_t prot) { }
+#endif