Update s390x_vr_IS_VMALLOC_ADDR() to include a non-zero vmalloc_start
check, making it consistent with s390x_generic_IS_VMALLOC_ADDR().
Fixes: d0164e7e480a ("s390x: uncouple physical and virtual memory spaces")
Signed-off-by: Mikhail Zaslonko <zaslonko(a)linux.ibm.com>
---
 s390x.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/s390x.c b/s390x.c
index 0e8e2b3..1117bf0 100644
--- a/s390x.c
+++ b/s390x.c
@@ -724,13 +724,13 @@ static ulong s390x_vr_PTOV(ulong paddr)
 {
 	return paddr + machdep->identity_map_base;
 }
 
 static int s390x_vr_IS_VMALLOC_ADDR(ulong vaddr)
 {
-	return (vaddr >= vt->vmalloc_start && vaddr < machdep->kvbase);
+	return (vt->vmalloc_start && vaddr >= vt->vmalloc_start &&
vaddr < machdep->kvbase);
 }
 
 ulong s390x_VTOP(ulong vaddr)
 {
 	return machdep->machspec->virt_to_phys(vaddr);
 }
-- 
2.49.0