Fix clippy warnings

src/devices/src/virtio/console/port_io.rs

@@ -118,7 +118,7 @@ impl PortOutput for PortOutputFd {
             VolatileMemoryError::IOError(e) => e,
             e => {
                 log::error!("Unsuported error from write_volatile: {e:?}");
-                io::Error::new(ErrorKind::Other, e)
+                io::Error::other(e)
             }
         })
     }
@@ -173,9 +173,7 @@ impl PortOutputLog {
 
 impl PortOutput for PortOutputLog {
     fn write_volatile(&mut self, buf: &VolatileSlice) -> Result<usize, io::Error> {
-        self.buf
-            .write_volatile(buf)
-            .map_err(|e| io::Error::new(ErrorKind::Other, e))?;
+        self.buf.write_volatile(buf).map_err(io::Error::other)?;
 
         let mut start = 0;
         for (i, ch) in self.buf.iter().cloned().enumerate() {

src/devices/src/virtio/fs/linux/passthrough.rs

@@ -2030,7 +2030,7 @@ impl FileSystem for PassthroughFs {
                     0,
                 )
             };
-            if ret == libc::MAP_FAILED {
+            if std::ptr::eq(ret, libc::MAP_FAILED) {
                 return Err(io::Error::last_os_error());
             }
 
@@ -2062,7 +2062,7 @@ impl FileSystem for PassthroughFs {
                 foffset as libc::off_t,
             )
         };
-        if ret == libc::MAP_FAILED {
+        if std::ptr::eq(ret, libc::MAP_FAILED) {
             return Err(io::Error::last_os_error());
         }
 
@@ -2092,7 +2092,7 @@ impl FileSystem for PassthroughFs {
                     0_i64,
                 )
             };
-            if ret == libc::MAP_FAILED {
+            if std::ptr::eq(ret, libc::MAP_FAILED) {
                 return Err(io::Error::last_os_error());
             }
         }

src/libkrun/src/lib.rs

@@ -1160,7 +1160,7 @@ fn map_kernel(ctx_id: u32, kernel_path: &PathBuf) -> i32 {
             0_i64,
         )
     };
-    if kernel_host_addr == libc::MAP_FAILED {
+    if std::ptr::eq(kernel_host_addr, libc::MAP_FAILED) {
         error!("Can't load kernel into process map");
         return -libc::EINVAL;
     }

src/vmm/src/linux/vstate.rs

@@ -828,7 +828,7 @@ impl Vcpu {
         // _before_ running this, then there is nothing we can do.
         Self::TLS_VCPU_PTR.with(|cell: &VcpuCell| {
             if let Some(vcpu_ptr) = cell.get() {
-                if vcpu_ptr == self as *mut Vcpu {
+                if std::ptr::eq(vcpu_ptr, self) {
                     Self::TLS_VCPU_PTR.with(|cell: &VcpuCell| cell.take());
                     return Ok(());
                 }