1 files changed, 5 insertions, 0 deletions

diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c
index 69cbc1a81201..8dc7ee1ef336 100644
--- a/arch/blackfin/kernel/setup.c
+++ b/arch/blackfin/kernel/setup.c
@@ -597,7 +597,12 @@ static __init void memory_setup(void)
         }
 
 #ifdef CONFIG_MPU
+#if defined(CONFIG_ROMFS_ON_MTD) && defined(CONFIG_MTD_ROM)
+        page_mask_nelts = (((_ramend + ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE -
+                                        ASYNC_BANK0_BASE) >> PAGE_SHIFT) + 31) / 32;
+#else
         page_mask_nelts = ((_ramend >> PAGE_SHIFT) + 31) / 32;
+#endif
         page_mask_order = get_order(3 * page_mask_nelts * sizeof(long));
 #endif