[PATCH] riscv: Don't use hugepage mappings for vmemmap if it's not supported

[Nam Cao]

Commit ff172d4818ad ("riscv: Use hugepage mappings for vmemmap") broke XIP
kernel, because huge pages are not supported on XIP kernel.

Only use hugepage mapping if it is supported.

Fixes: ff172d4818ad ("riscv: Use hugepage mappings for vmemmap")
Signed-off-by: Nam Cao <namcao at linutronix.de>
Cc: Alexandre Ghiti <alexghiti at rivosinc.com>
Cc: <stable at vger.kernel.org>
---
 arch/riscv/mm/init.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index 968761843203..c081e7d349b1 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -1414,6 +1414,8 @@ int __meminit vmemmap_check_pmd(pmd_t *pmdp, int node,
 int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node,
 			       struct vmem_altmap *altmap)
 {
+	if (!IS_ENABLED(CONFIG_HAVE_ARCH_HUGE_VMAP))
+		return vmemmap_populate_basepages(start, end, node, NULL);
 	/*
 	 * Note that SPARSEMEM_VMEMMAP is only selected for rv64 and that we
 	 * can't use hugepage mappings for 2-level page table because in case of
-- 
2.39.2