[PATCH RFC v3 15/21] x86: mm: skip collapse_pud_page() when CONFIG_X86_DIRECT_GBPAGES disabled

[Yeoreum Yun]

The behaviour of pXd_page() will change with generic compile-time folded
page tables by disallowing its use and triggering a compile-time error
when it's used improperly, ensuring that the actual pXd_page() is used
instead.

To prepare fot that, skip collapse_pud_page() when
CONFIG_X86_DIRECT_GBPAGES is disabled.

There should be no functional change.

Signed-off-by: Yeoreum Yun <yeoreum.yun@xxxxxxx>
---
 arch/x86/mm/pat/set_memory.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/mm/pat/set_memory.c b/arch/x86/mm/pat/set_memory.c
index a1a061d995b3..07a873775279 100644
--- a/arch/x86/mm/pat/set_memory.c
+++ b/arch/x86/mm/pat/set_memory.c
@@ -1315,7 +1315,7 @@ static int collapse_pud_page(pud_t *pud, unsigned long addr,
 	pmd_t *pmd, first;
 	int i;
 
-	if (!direct_gbpages)
+	if (!IS_ENABLED(CONFIG_X86_FEATURE_GBPAGES) || !direct_gbpages)
 		return 0;
 
 	addr &= PUD_MASK;

-- 
2.43.0