Add explicit `use` statements core::arch::asm.

The new asm!() syntx has been stabilized in
nightly Rust, but requires either a `use`
statement or explicit package qualification.
This PR adds `use` statements in the modules
that use the new macro.  Fixes #117.

Signed-off-by: Dan Cross <cross@gajendra.net>

5 files changed, 7 insertions, 0 deletions

diff --git a/src/debugregs.rs b/src/debugregs.rs
index 7255d5b..8319630 100644
--- a/src/debugregs.rs
+++ b/src/debugregs.rs
@@ -17,6 +17,8 @@
 use bit_field::BitField;
 use bitflags::bitflags;
 
+use core::arch::asm;
+
 /// An array list of all available breakpoint registers.
 pub const BREAKPOINT_REGS: [Breakpoint; 4] = [
     Breakpoint::Dr0,
diff --git a/src/irq.rs b/src/irq.rs
index c35b056..bd67997 100644
--- a/src/irq.rs
+++ b/src/irq.rs
@@ -3,6 +3,7 @@
 
 use bitflags::*;
 
+use core::arch::asm;
 use core::fmt;
 
 /// x86 Exception description (see also Intel Vol. 3a Chapter 6).
diff --git a/src/lib.rs b/src/lib.rs
index a98bf1e..94775a9 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -6,6 +6,7 @@
 #![cfg_attr(all(test, feature = "vmtest"), feature(custom_test_frameworks))]
 #![cfg_attr(all(test, feature = "vmtest"), test_runner(x86test::runner::runner))]
 
+use core::arch::asm;
 #[cfg(target_arch = "x86")]
 pub(crate) use core::arch::x86 as arch;
 #[cfg(target_arch = "x86_64")]
diff --git a/src/task.rs b/src/task.rs
index d819e2d..d572c8d 100644
--- a/src/task.rs
+++ b/src/task.rs
@@ -1,6 +1,7 @@
 //! Helpers to program the task state segment.
 //! See Intel 3a, Chapter 7
 
+use core::arch::asm;
 pub use crate::segmentation;
 
 /// Returns the current value of the task register.
diff --git a/src/tlb.rs b/src/tlb.rs
index 1c90120..abc8a35 100644
--- a/src/tlb.rs
+++ b/src/tlb.rs
@@ -1,5 +1,7 @@
 //! Functions to flush the translation lookaside buffer (TLB).
 
+use core::arch::asm;
+
 /// Invalidate the given address in the TLB using the `invlpg` instruction.
 ///
 /// # Safety