rust: bindgen: upgrade to 0.65.1

upgrade bindgen version to accommodate LLVM16
Signed-off-by: Allen Xu <[email protected]>

Documentation/process/changes.rst

@@ -32,7 +32,7 @@ you probably needn't concern yourself with pcmciautils.
 GNU C                  5.1              gcc --version
 Clang/LLVM (optional)  11.0.0           clang --version
 Rust (optional)        1.71.0           rustc --version
-bindgen (optional)     0.56.0           bindgen --version
+bindgen (optional)     0.65.1           bindgen --version
 GNU make               3.82             make --version
 bash                   4.2              bash --version
 binutils               2.25             ld -v

rust/Makefile

@@ -325,7 +325,7 @@ quiet_cmd_bindgen = BINDGEN $@
 	$(BINDGEN) $< $(bindgen_target_flags) \
 		--use-core --with-derive-default --ctypes-prefix core::ffi --no-layout-tests \
 		--no-debug '.*' \
-		--size_t-is-usize -o $@ -- $(bindgen_c_flags_final) -DMODULE \
+		-o $@ -- $(bindgen_c_flags_final) -DMODULE \
 		$(bindgen_target_cflags) $(bindgen_target_extra)
 
 $(obj)/bindings/bindings_generated.rs: private bindgen_target_flags = \
@@ -339,8 +339,8 @@ $(obj)/bindings/bindings_generated.rs: $(src)/bindings/bindings_helper.h \
 # given it is `libclang`; but for consistency, future Clang changes and/or
 # a potential future GCC backend for `bindgen`, we disable it too.
 $(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_flags = \
-    --blacklist-type '.*' --whitelist-var '' \
-    --whitelist-function 'rust_helper_.*'
+    --blocklist-type '.*' --allowlist-var '' \
+    --allowlist-function 'rust_helper_.*'
 $(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_cflags = \
     -I$(objtree)/$(obj) -Wno-missing-prototypes -Wno-missing-declarations
 $(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_extra = ; \

rust/helpers.c

@@ -657,19 +657,18 @@ int rust_helper_fs_parse(struct fs_context *fc,
 EXPORT_SYMBOL_GPL(rust_helper_fs_parse);
 
 /*
- * We use `bindgen`'s `--size_t-is-usize` option to bind the C `size_t` type
- * as the Rust `usize` type, so we can use it in contexts where Rust
- * expects a `usize` like slice (array) indices. `usize` is defined to be
- * the same as C's `uintptr_t` type (can hold any pointer) but not
- * necessarily the same as `size_t` (can hold the size of any single
+ * `bindgen` binds the C `size_t` type the Rust `usize` type, so we can
+ * use it in contexts where Rust expects a `usize` like slice (array) indices.
+ * `usize` is defined to be the same as C's `uintptr_t` type (can hold any pointer)
+ * but not necessarily the same as `size_t` (can hold the size of any single
  * object). Most modern platforms use the same concrete integer type for
  * both of them, but in case we find ourselves on a platform where
  * that's not true, fail early instead of risking ABI or
  * integer-overflow issues.
  *
  * If your platform fails this assertion, it means that you are in
- * danger of integer-overflow bugs (even if you attempt to remove
- * `--size_t-is-usize`). It may be easiest to change the kernel ABI on
+ * danger of integer-overflow bugs (even if you attempt to add
+ * `--no-size_t-is-usize`). It may be easiest to change the kernel ABI on
  * your platform such that `size_t` matches `uintptr_t` (i.e., to increase
  * `size_t`, because `uintptr_t` has to be at least as big as `size_t`).
  */

rust/kernel/lib.rs

@@ -257,7 +257,4 @@ fn panic(info: &core::panic::PanicInfo<'_>) -> ! {
     pr_emerg!("{}\n", info);
     // SAFETY: FFI call.
     unsafe { bindings::BUG() };
-    // Bindgen currently does not recognize `__noreturn` so `BUG` returns `()`
-    // instead of `!`. See <https://github.com/rust-lang/rust-bindgen/issues/2094>.
-    loop {}
 }

scripts/min-tool-version.sh

@@ -30,7 +30,7 @@ rustc)
 	echo 1.71.0
 	;;
 bindgen)
-	echo 0.56.0
+	echo 0.65.1
 	;;
 *)
 	echo "$1: unknown tool" >&2