[RFC PATCH 20/34] x86: kexec: use proper set_pXd() for generic compile-time folded patable in machine_kexec_page_table_set_one()

[Yeoreum Yun]

We want to rework how set_pXd() behaves for generic compile-time folded
page tables by disallowing its use and triggering a compile-time error
when it is used improperly, ensuring that the actual first-level set_pXd()
function is used instead.

Therefore, replace set_pgd() with set_pud() to setup first-level pgtable
in case of X86_PAE.

There should be no functional change.

Signed-off-by: Yeoreum Yun <yeoreum.yun at arm.com>
---
 arch/x86/kernel/machine_kexec_32.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kernel/machine_kexec_32.c b/arch/x86/kernel/machine_kexec_32.c
index 1f325304c4a84..a36321ee9f24f 100644
--- a/arch/x86/kernel/machine_kexec_32.c
+++ b/arch/x86/kernel/machine_kexec_32.c
@@ -84,12 +84,12 @@ static void machine_kexec_page_table_set_one(
 	pud_t *pud;
 
 	pgd += pgd_index(vaddr);
-#ifdef CONFIG_X86_PAE
-	if (!(pgd_val(*pgd) & _PAGE_PRESENT))
-		set_pgd(pgd, __pgd(__pa(pmd) | _PAGE_PRESENT));
-#endif
 	p4d = p4d_offset(pgd, vaddr);
 	pud = pud_offset(p4d, vaddr);
+#ifdef CONFIG_X86_PAE
+	if (!(pud_val(*pud) & _PAGE_PRESENT))
+		set_pud(pud, __pud(__pa(pmd) | _PAGE_PRESENT));
+#endif
 	pmd = pmd_offset(pud, vaddr);
 	if (!(pmd_val(*pmd) & _PAGE_PRESENT))
 		set_pmd(pmd, __pmd(__pa(pte) | _PAGE_TABLE));
-- 
LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7}