[PATCH v2] rust: iommu: replace core::mem::zeroed with Zeroable::zeroed

All types in `bindings` implement `Zeroable` if they can. This enables
using `Zeroable::zeroed` for `io_pgtable_cfg` initialization instead
of relying on `..unsafe { core::mem::zeroed() }`.

This change improves readability and removes an unnecessary unsafe
block.

Link: https://github.com/Rust-for-Linux/linux/issues/1189
Suggested-by: Benno Lossin <[email protected]>
Signed-off-by: Nicolás Antinori <[email protected]>
---
Changelog:
v2: replaced `..pin_init::zeroed()` with `..Zeroable::zeroed()` as
    discussed in v1 thread.
v1:
  https://lore.kernel.org/rust-for-linux/[email protected]/T/#u

 rust/kernel/iommu/pgtable.rs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/rust/kernel/iommu/pgtable.rs b/rust/kernel/iommu/pgtable.rs
index c88e38fd938a..eddda8d9d62a 100644
--- a/rust/kernel/iommu/pgtable.rs
+++ b/rust/kernel/iommu/pgtable.rs
@@ -102,8 +102,7 @@ pub unsafe fn new_raw(dev: &Device<Bound>, config: Config) -> Result<IoPageTable
             coherent_walk: config.coherent_walk,
             tlb: &raw const NOOP_FLUSH_OPS,
             iommu_dev: dev.as_raw(),
-            // SAFETY: All zeroes is a valid value for `struct io_pgtable_cfg`.
-            ..unsafe { core::mem::zeroed() }
+            ..Zeroable::zeroed()
         };

         // SAFETY:
--
2.47.3