bindgen breaks build with ftrace_branch_data_union_... (LLVM >= 16)

@Shinyzenith

Reported by Aakash Sen Sharma (@Shinyzenith) at https://rust-for-linux.zulipchat.com/#narrow/stream/291565-Help/topic/Build.20errors/near/364313442.

Requires LLVM >= 16 to reproduce. bindgen 0.62.0 fixes it: rust-lang/rust-bindgen#2488, rust-lang/rust-bindgen#2319 (thanks @cuviper for the pointer!).

❯ make rustdoc LLVM=1 CLIPPY=1 -j$(nproc)
  DESCEND objtool
  CALL    scripts/checksyscalls.sh
  INSTALL libsubcmd_headers
  RUSTC L rust/core.o
  BINDGEN rust/bindings/bindings_generated.rs
  BINDGEN rust/bindings/bindings_helpers_generated.rs
  BINDGEN rust/uapi/uapi_generated.rs
thread 'main' panicked at '"ftrace_branch_data_union_(anonymous_at__/_/include/linux/compiler_types_h_146_2)" is not a valid Ident', /home/aakash/.local/share/cargo/registry/src/gh.grcyy1.kdns.fr-1ecc6299db9ec823/proc-macro2-1.0.24/src/fallback.rs:693:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
make[1]: *** [rust/Makefile:316: rust/uapi/uapi_generated.rs] Error 1
make[1]: *** Deleting file 'rust/uapi/uapi_generated.rs'
make[1]: *** Waiting for unfinished jobs....
thread 'main' panicked at '"ftrace_branch_data_union_(anonymous_at__/_/include/linux/compiler_types_h_146_2)" is not a valid Ident', /home/aakash/.local/share/cargo/registry/src/gh.grcyy1.kdns.fr-1ecc6299db9ec823/proc-macro2-1.0.24/src/fallback.rs:693:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
make[1]: *** [rust/Makefile:310: rust/bindings/bindings_generated.rs] Error 1
make[1]: *** Deleting file 'rust/bindings/bindings_generated.rs'
make: *** [Makefile:1293: prepare] Error 2

Commit fixing the issue: https://github.com/Shinyzenith/linux/commit/78d10f88fcc117bfc3cca27a115d72b8f83c377f

Send upstream to the mailing list: https://lore.kernel.org/rust-for-linux/20230612194311.24826-1-aakashsensharma@gmail.com/T/#u

rust: bindgen: upgrade to 0.65.1

@fbq

@fbq Has the patch been merged upstream?

If you mean Linus' tree, no, he will merge our PR (which includes the upgrade) during the merge window, in 2-4 weeks.

rust: bindgen: upgrade to 0.65.1

rtla/timerlat: Use pretty formatting only on interactive tty

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`bindgen` breaks build with `ftrace_branch_data_union_...` (LLVM >= 16) #1013

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bindgen breaks build with ftrace_branch_data_union_... (LLVM >= 16) #1013

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`bindgen` breaks build with `ftrace_branch_data_union_...` (LLVM >= 16) #1013