Address clippy lints

Fix the following:

- clippy::manual_div_ceil
- clippy::needless_lifetimes
- clippy::precedence
- clippy::repr_packed_without_abi

Signed-off-by: Tim Crawford <[email protected]>

Author: crawfxrd

src/app/cmos.rs

@@ -58,7 +58,7 @@ impl CmosOptionTable {
         let hi = u16::from(self.cmos.read(Self::CHECKSUM_OFFSET));
         let lo = u16::from(self.cmos.read(Self::CHECKSUM_OFFSET + 1));
 
-        hi << 8 | lo
+        (hi << 8) | lo
     }
 
     /// Write the checksum to the CMOS option table.

src/app/ec.rs

@@ -404,7 +404,7 @@ impl<T: Timeout> SpiLegacy<T> {
 
     unsafe fn read(&mut self, data: &mut [u8]) -> core::result::Result<(), ectool::Error> {
         let block_size = self.block_size();
-        let blocks = (data.len() + block_size - 1) / block_size;
+        let blocks = data.len().div_ceil(block_size);
         for block in 0..blocks {
             unsafe {
                 self.pmc_cmd(0x03)?;
@@ -427,7 +427,7 @@ impl<T: Timeout> SpiLegacy<T> {
 
     unsafe fn write(&mut self, data: &[u8]) -> core::result::Result<(), ectool::Error> {
         let block_size = self.block_size();
-        let blocks = (data.len() + block_size - 1) / block_size;
+        let blocks = data.len().div_ceil(block_size);
         for block in 0..blocks {
             unsafe {
                 self.pmc_cmd(0x02)?;

src/app/pci.rs

@@ -6,7 +6,7 @@ use std::prelude::*;
 use std::uefi::guid;
 
 #[allow(dead_code)]
-#[repr(packed)]
+#[repr(C, packed)]
 struct Rsdp {
     signature: [u8; 8], // b"RSD PTR "
     chksum: u8,
@@ -21,7 +21,7 @@ struct Rsdp {
 }
 
 #[allow(dead_code)]
-#[repr(packed)]
+#[repr(C, packed)]
 struct SdtHeader {
     signature: [u8; 4],
     length: u32,

src/display.rs

@@ -137,7 +137,7 @@ impl<'a> ScaledDisplay<'a> {
     }
 }
 
-impl<'a> Renderer for ScaledDisplay<'a> {
+impl Renderer for ScaledDisplay<'_> {
     fn width(&self) -> u32 {
         self.display.width() / self.scale
     }

src/image/mod.rs

@@ -17,7 +17,7 @@ pub struct ImageRoi<'a> {
     image: &'a Image,
 }
 
-impl<'a> ImageRoi<'a> {
+impl ImageRoi<'_> {
     /// Draw the ROI on a window
     pub fn draw<R: Renderer>(&self, renderer: &mut R, x: i32, mut y: i32) {
         let stride = self.image.w;