bare4_2

examples/bare4.rs

@@ -101,12 +101,15 @@ fn main() -> ! {
 //
 //    What was the error message and explain why.
 //
-//    ** your answer here **
+//    Error message recieved "call to unsafe function". This is because the function being called
+//    is volatile, and has to be run in a unsafe function or block.
 //
 //    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 **
+//    read_volatile is a declared volatile operation, and thus are guarenteed to not be the same
+//    when read at different occassions. Declaring it as unsafe disables the rust memory guarentee, which
+//    allows the volatile function to read the memory.
 //
 //    Commit your answers (bare4_2)
 //