Merge #2334

2334: update rust january 7 2021 r=bradjc a=hudson-ayers

### Pull Request Overview

This pull request updates the rust nightly version to 2021-01-07. This was motivated by the stabilization of `min_const_generics` ( rust-lang/rust#79135 ) -- by using this nightly, we will be able to use const generics in Tock without adding an unstable feature.


### Testing Strategy

compiling

### TODO or Help Wanted

N/A

### Documentation Updated

- [x] Updated the relevant files in `/docs`.

### Formatting

- [x] Ran `make prepush`.


Co-authored-by: Hudson Ayers <hayers@stanford.edu>

Author: bors[bot]

.vscode/settings.json

@@ -1,4 +1,4 @@
 {
     "editor.formatOnSave": true,
-    "rust-client.channel": "nightly-2020-10-25",
+    "rust-client.channel": "nightly-2021-01-07",
 }

capsules/src/st77xx.rs

@@ -1,6 +1,6 @@
 //! ST77xx Screen
 //!
-//! - https://learn.adafruit.com/adafruit-1-3-and-1-54-240-x-240-wide-angle-tft-lcd-displays
+//! - <https://learn.adafruit.com/adafruit-1-3-and-1-54-240-x-240-wide-angle-tft-lcd-displays>
 //!
 //! The screen supports multiple physical busses, and this driver is implemented
 //! on top of the generic `Bus` interface.

capsules/src/usb/ctap.rs

@@ -1,6 +1,6 @@
 //! Client to Authenticator Protocol CTAPv2 over USB HID
 //!
-//! Based on the spec avaliable at: https://fidoalliance.org/specs/fido-v2.0-id-20180227/fido-client-to-authenticator-protocol-v2.0-id-20180227.html
+//! Based on the spec avaliable at: <https://fidoalliance.org/specs/fido-v2.0-id-20180227/fido-client-to-authenticator-protocol-v2.0-id-20180227.html>
 
 use core::cell::Cell;
 use core::cmp;

chips/earlgrey/src/aes.rs

@@ -1,6 +1,6 @@
 //! Support for the AES hardware block on OpenTitan
 //!
-//! https://docs.opentitan.org/hw/ip/aes/doc/
+//! <https://docs.opentitan.org/hw/ip/aes/doc/>
 
 use kernel::common::cells::{OptionalCell, TakeCell};
 use kernel::common::registers::{

chips/imxrt10xx/src/lib.rs

@@ -5,7 +5,6 @@
 #![crate_name = "imxrt10xx"]
 #![crate_type = "rlib"]
 #![feature(const_fn)]
-#![feature(min_const_generics)] // Stabilized in Rust 1.51 (https://github.com/rust-lang/rust/pull/79135)
 #![no_std]
 
 pub mod chip;

doc/Getting_Started.md

@@ -75,7 +75,7 @@ of installing some of these tools, but you can also install them yourself.
 
 #### Rust (nightly)
 
-We are using `nightly-2020-10-25`. We require
+We are using `nightly-2021-01-07`. We require
 installing it with [rustup](http://www.rustup.rs) so you can manage multiple
 versions of Rust and continue using stable versions for other Rust code:
 
@@ -90,7 +90,7 @@ to your `$PATH`.
 Then install the correct nightly version of Rust:
 
 ```bash
-$ rustup install nightly-2020-10-25
+$ rustup install nightly-2021-01-07
 ```
 
 #### Tockloader

kernel/src/debug.rs

@@ -70,7 +70,7 @@ use crate::ReturnCode;
 /// Also, in our use cases, writes are infaillible, so the write function just doesn't return
 /// anything.
 ///
-/// See also the tracking issue: https://github.com/rust-lang/rfcs/issues/2262
+/// See also the tracking issue: <https://github.com/rust-lang/rfcs/issues/2262>
 pub trait IoWrite {
     fn write(&mut self, buf: &[u8]);
 

kernel/src/platform/mpu.rs

@@ -53,7 +53,7 @@ impl Region {
 /// Null type for the default type of the `MpuConfig` type in an implementation
 /// of the `MPU` trait. We need this to workaround a bug in the Rust compiler.
 ///
-/// Depending how https://github.com/rust-lang/rust/issues/65774 is resolved we
+/// Depending how <https://github.com/rust-lang/rust/issues/65774> is resolved we
 /// may be able to remove this type, but only if a default `Display` is
 /// provided for the `()` type.
 #[derive(Default)]

kernel/src/sched/round_robin.rs

@@ -2,7 +2,7 @@
 //!
 //! This scheduler is specifically a Round Robin Scheduler with Interrupts.
 //!
-//! See: https://www.eecs.umich.edu/courses/eecs461/lecture/SWArchitecture.pdf
+//! See: <https://www.eecs.umich.edu/courses/eecs461/lecture/SWArchitecture.pdf>
 //! for details.
 //!
 //! When hardware interrupts occur while a userspace process is executing, this

rust-toolchain

@@ -1 +1 @@
-nightly-2020-10-25
+nightly-2021-01-07