diff --git a/examples/.bare4.rs.swp b/examples/.bare4.rs.swp
index 64198082dbcbcae4f408ab2afce55b6db5ab4f55..61ee4b1433b1f23c9614525fa4cd5f8b47ea02f2 100644
Binary files a/examples/.bare4.rs.swp and b/examples/.bare4.rs.swp differ
diff --git a/examples/bare4.rs b/examples/bare4.rs
index a954cea412f79a6f6e1581ea5f506d5bda64e4bf..4262927c0ec43aa9ba7464846d0a321e78768d15 100644
--- a/examples/bare4.rs
+++ b/examples/bare4.rs
@@ -27,8 +27,8 @@ use address::*;
 
 #[inline(always)]
 fn read_u32(addr: u32) -> u32 {
-    unsafe { core::ptr::read_volatile(addr as *const _) }
-    //core::ptr::read_volatile(addr as *const _)
+    //unsafe { core::ptr::read_volatile(addr as *const _) }
+    core::ptr::read_volatile(addr as *const _)
 }
 
 #[inline(always)]
@@ -83,10 +83,13 @@ fn main() {
 // 2. comment out line 30 and uncomment line 31 (essentially omitting the `unsafe`)
 // what was the error message and explain why,
 // ** your answer here **
+//  call to unsafe function recvier unsafe function or blok
 //
 // digging a bit deeper, why do you think `read_volatile` is declared `unsafe`
 // (https://doc.rust-lang.org/core/ptr/fn.read_volatile.html, for some food for thought )
 // ** your answer here **
+// it is reading a operation from a perifial. perifials ar critical resorses and writ operations
+// kan cas race condition in combination with read.
 //
 // commit your answers (bare4_2)
 //