acpid: fix physmap size bug

acpid/src/acpi.rs

@@ -191,7 +191,7 @@ impl Sdt {
 
         while left > 0 {
             let to_copy = std::cmp::min(left, length_per_iteration);
-            let additional_pages = PhysmapGuard::map(offset, length_per_iteration)?;
+            let additional_pages = PhysmapGuard::map(offset, length_per_iteration.div_ceil(PAGE_SIZE))?;
 
             loaded.extend(&additional_pages[..to_copy]);
 

acpid/src/main.rs

@@ -1,4 +1,4 @@
-#![feature(if_let_guard)]
+#![feature(if_let_guard, int_roundings)]
 
 use std::convert::TryFrom;
 use std::io::{self, prelude::*};