1 files changed, 2 insertions, 0 deletions

diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index f4c95aec5ac..882328efc3d 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -134,6 +134,8 @@ static void __iomem *__ioremap(unsigned long phys_addr, unsigned long size,
                         return NULL;
         }
 
+        WARN_ON_ONCE(page_is_ram(pfn));
+
         switch (mode) {
         case IOR_MODE_UNCACHED:
         default: