Replace the use of `as_ptr` which works through `<CStr as
Deref<Target=&[u8]>::deref()` in preparation for replacing
`kernel::str::CStr` with `core::ffi::CStr` as the latter does not
implement `Deref<Target=&[u8]>`.

Signed-off-by: Tamir Duberstein <tamird@gmail.com>
---
 rust/kernel/opp.rs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/rust/kernel/opp.rs b/rust/kernel/opp.rs
index 2c763fa9276d..9d6c58178a6f 100644
--- a/rust/kernel/opp.rs
+++ b/rust/kernel/opp.rs
@@ -13,7 +13,7 @@
     cpumask::{Cpumask, CpumaskVar},
     device::Device,
     error::{code::*, from_err_ptr, from_result, to_result, Result, VTABLE_DEFAULT_ERROR},
-    ffi::c_ulong,
+    ffi::{c_char, c_ulong},
     prelude::*,
     str::CString,
     sync::aref::{ARef, AlwaysRefCounted},
@@ -88,12 +88,12 @@ fn drop(&mut self) {
 use macros::vtable;
 
 /// Creates a null-terminated slice of pointers to [`Cstring`]s.
-fn to_c_str_array(names: &[CString]) -> Result<KVec<*const u8>> {
+fn to_c_str_array(names: &[CString]) -> Result<KVec<*const c_char>> {
     // Allocated a null-terminated vector of pointers.
     let mut list = KVec::with_capacity(names.len() + 1, GFP_KERNEL)?;
 
     for name in names.iter() {
-        list.push(name.as_ptr().cast(), GFP_KERNEL)?;
+        list.push(name.as_char_ptr(), GFP_KERNEL)?;
     }
 
     list.push(ptr::null(), GFP_KERNEL)?;

-- 
2.51.1