Merge tag 'char-misc-7.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc/IIO driver updates from Greg KH:
 "Here is the big set of char/misc/iio and other smaller driver
  subsystem changes for 7.0-rc1. Lots of little things in here,
  including:

   - Loads of iio driver changes and updates and additions

   - gpib driver updates

   - interconnect driver updates

   - i3c driver updates

   - hwtracing (coresight and intel) driver updates

   - deletion of the obsolete mwave driver

   - binder driver updates (rust and c versions)

   - mhi driver updates (causing a merge conflict, see below)

   - mei driver updates

   - fsi driver updates

   - eeprom driver updates

   - lots of other small char and misc driver updates and cleanups

  All of these have been in linux-next for a while, with no reported
  issues"

* tag 'char-misc-7.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (297 commits)
  mux: mmio: fix regmap leak on probe failure
  rust_binder: return p from rust_binder_transaction_target_node()
  drivers: android: binder: Update ARef imports from sync::aref
  rust_binder: fix needless borrow in context.rs
  iio: magn: mmc5633: Fix Kconfig for combination of I3C as module and driver builtin
  iio: sca3000: Fix a resource leak in sca3000_probe()
  iio: proximity: rfd77402: Add interrupt handling support
  iio: proximity: rfd77402: Document device private data structure
  iio: proximity: rfd77402: Use devm-managed mutex initialization
  iio: proximity: rfd77402: Use kernel helper for result polling
  iio: proximity: rfd77402: Align polling timeout with datasheet
  iio: cros_ec: Allow enabling/disabling calibration mode
  iio: frequency: ad9523: correct kernel-doc bad line warning
  iio: buffer: buffer_impl.h: fix kernel-doc warnings
  iio: gyro: itg3200: Fix unchecked return value in read_raw
  MAINTAINERS: add entry for ADE9000 driver
  iio: accel: sca3000: remove unused last_timestamp field
  iio: accel: adxl372: remove unused int2_bitmask field
  iio: adc: ad7766: Use iio_trigger_generic_data_rdy_poll()
  iio: magnetometer: Remove IRQF_ONESHOT
  ...

rust/bindings/lib.rs

@@ -67,3 +67,16 @@ mod bindings_helper {
 }
 
 pub use bindings_raw::*;
+
+pub const compat_ptr_ioctl: Option<
+    unsafe extern "C" fn(*mut file, ffi::c_uint, ffi::c_ulong) -> ffi::c_long,
+> = {
+    #[cfg(CONFIG_COMPAT)]
+    {
+        Some(bindings_raw::compat_ptr_ioctl)
+    }
+    #[cfg(not(CONFIG_COMPAT))]
+    {
+        None
+    }
+};

rust/helpers/binder.c

@@ -7,20 +7,21 @@
 #include <linux/list_lru.h>
 #include <linux/task_work.h>
 
-unsigned long rust_helper_list_lru_count(struct list_lru *lru)
+__rust_helper unsigned long rust_helper_list_lru_count(struct list_lru *lru)
 {
 	return list_lru_count(lru);
 }
 
-unsigned long rust_helper_list_lru_walk(struct list_lru *lru,
-					list_lru_walk_cb isolate, void *cb_arg,
-					unsigned long nr_to_walk)
+__rust_helper unsigned long rust_helper_list_lru_walk(struct list_lru *lru,
+						      list_lru_walk_cb isolate,
+						      void *cb_arg,
+						      unsigned long nr_to_walk)
 {
 	return list_lru_walk(lru, isolate, cb_arg, nr_to_walk);
 }
 
-void rust_helper_init_task_work(struct callback_head *twork,
-				task_work_func_t func)
+__rust_helper void rust_helper_init_task_work(struct callback_head *twork,
+					      task_work_func_t func)
 {
 	init_task_work(twork, func);
 }

rust/kernel/miscdevice.rs

@@ -20,7 +20,7 @@ use crate::{
     seq_file::SeqFile,
     types::{ForeignOwnable, Opaque},
 };
-use core::{marker::PhantomData, mem::MaybeUninit, pin::Pin};
+use core::{marker::PhantomData, pin::Pin};
 
 /// Options for creating a misc device.
 #[derive(Copy, Clone)]
@@ -32,8 +32,7 @@ pub struct MiscDeviceOptions {
 impl MiscDeviceOptions {
     /// Create a raw `struct miscdev` ready for registration.
     pub const fn into_raw<T: MiscDevice>(self) -> bindings::miscdevice {
-        // SAFETY: All zeros is valid for this C type.
-        let mut result: bindings::miscdevice = unsafe { MaybeUninit::zeroed().assume_init() };
+        let mut result: bindings::miscdevice = pin_init::zeroed();
         result.minor = bindings::MISC_DYNAMIC_MINOR as ffi::c_int;
         result.name = crate::str::as_char_ptr_in_const_context(self.name);
         result.fops = MiscdeviceVTable::<T>::build();
@@ -411,7 +410,7 @@ impl<T: MiscDevice> MiscdeviceVTable<T> {
         compat_ioctl: if T::HAS_COMPAT_IOCTL {
             Some(Self::compat_ioctl)
         } else if T::HAS_IOCTL {
-            Some(bindings::compat_ptr_ioctl)
+            bindings::compat_ptr_ioctl
         } else {
             None
         },
@@ -420,8 +419,7 @@ impl<T: MiscDevice> MiscdeviceVTable<T> {
         } else {
             None
         },
-        // SAFETY: All zeros is a valid value for `bindings::file_operations`.
-        ..unsafe { MaybeUninit::zeroed().assume_init() }
+        ..pin_init::zeroed()
     };
 
     const fn build() -> &'static bindings::file_operations {

rust/kernel/sync/arc.rs

@@ -240,6 +240,9 @@ impl<T> Arc<T> {
         // `Arc` object.
         Ok(unsafe { Self::from_inner(inner) })
     }
+
+    /// The offset that the value is stored at.
+    pub const DATA_OFFSET: usize = core::mem::offset_of!(ArcInner<T>, data);
 }
 
 impl<T: ?Sized> Arc<T> {