diff --git a/arch/um/os-Linux/process.c b/arch/um/os-Linux/process.c
index 8176b0b..2064e840 100644
--- a/arch/um/os-Linux/process.c
+++ b/arch/um/os-Linux/process.c
@@ -190,7 +190,7 @@
 }
 
 #ifndef MADV_REMOVE
-#define MADV_REMOVE	0x5		/* remove these pages & resources */
+#define MADV_REMOVE KERNEL_MADV_REMOVE
 #endif
 
 int os_drop_memory(void *addr, int length)
@@ -216,7 +216,7 @@
 	}
 
 	addr = mmap64(NULL, UM_KERN_PAGE_SIZE, PROT_READ | PROT_WRITE,
-		      MAP_PRIVATE, fd, 0);
+		      MAP_SHARED, fd, 0);
 	if(addr == MAP_FAILED){
 		printk("Mapping test memory file failed, err = %d\n", -errno);
 		return 0;