rust: bindings: use core::ffi instead of kernel::c_types

Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

Author: ojeda

rust/Makefile

@@ -297,7 +297,7 @@ bindgen_c_flags_final = $(bindgen_c_flags_lto)
 quiet_cmd_bindgen = BINDGEN $@
       cmd_bindgen = \
 	$(BINDGEN) $< $(bindgen_target_flags) \
-		--use-core --with-derive-default --ctypes-prefix c_types \
+		--use-core --with-derive-default --ctypes-prefix core::ffi \
 		--no-debug '.*' \
 		--size_t-is-usize -o $@ -- $(bindgen_c_flags_final) -DMODULE \
 		$(bindgen_target_cflags) $(bindgen_target_extra)

rust/kernel/bindings.rs

@@ -22,7 +22,6 @@ mod bindings_raw {
     // Use glob import here to expose all helpers.
     // Symbols defined within the module will take precedence to the glob import.
     pub use super::bindings_helper::*;
-    use crate::c_types;
     include!(concat!(env!("OBJTREE"), "/rust/bindings_generated.rs"));
 }
 
@@ -33,7 +32,6 @@ mod bindings_raw {
 mod bindings_helper {
     // Import the generated bindings for types.
     use super::bindings_raw::*;
-    use crate::c_types;
     include!(concat!(
         env!("OBJTREE"),
         "/rust/bindings_helpers_generated.rs"