[melver:misc 1/3] thread 'main' panicked at '"ftrace_branch_data_union_(anonymous_at_include/linux/compiler_types_h_174_2)" is not a valid Ident', /opt/cross/rustc-1.68.2-bindgen-0.56.0/cargo/registry/src/github.com-1ecc6299db9ec823/proc-macro2-1.0.24/src/fallback.rs:693:9

[kernel test robot <lkp@intel.com>]

Hi Marco,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/melver/linux.git misc
head:   8e7fd36cd126fb8f13b26a5abbed2311eae7b0f5
commit: 0520483a21f628e22e5aca41b4d42b1a128426e1 [1/3] compiler_types: Introduce the Clang __preserve_most function attribute
config: x86_64-rhel-8.3-rust (https://download.01.org/0day-ci/archive/20230808/202308080100.a8MdCpIn-lkp@intel.com/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce: (https://download.01.org/0day-ci/archive/20230808/202308080100.a8MdCpIn-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202308080100.a8MdCpIn-lkp@intel.com/

All errors (new ones prefixed by >>):

>> thread 'main' panicked at '"ftrace_branch_data_union_(anonymous_at_include/linux/compiler_types_h_174_2)" is not a valid Ident', /opt/cross/rustc-1.68.2-bindgen-0.56.0/cargo/registry/src/github.com-1ecc6299db9ec823/proc-macro2-1.0.24/src/fallback.rs:693:9
   stack backtrace:
      0: rust_begin_unwind
                at /rustc/9eb3afe9ebe9c7d2b84b71002d44f4a0edac95e0/library/std/src/panicking.rs:575:5
      1: core::panicking::panic_fmt
                at /rustc/9eb3afe9ebe9c7d2b84b71002d44f4a0edac95e0/library/core/src/panicking.rs:64:14
      2: proc_macro2::fallback::Ident::_new
      3: proc_macro2::Ident::new
      4: bindgen::ir::context::BindgenContext::rust_ident
      5: <bindgen::ir::comp::CompInfo as bindgen::codegen::CodeGenerator>::codegen
      6: <bindgen::ir::ty::Type as bindgen::codegen::CodeGenerator>::codegen
      7: <bindgen::ir::item::Item as bindgen::codegen::CodeGenerator>::codegen
      8: <bindgen::ir::comp::CompInfo as bindgen::codegen::CodeGenerator>::codegen
      9: <bindgen::ir::ty::Type as bindgen::codegen::CodeGenerator>::codegen
     10: <bindgen::ir::item::Item as bindgen::codegen::CodeGenerator>::codegen
     11: <bindgen::ir::module::Module as bindgen::codegen::CodeGenerator>::codegen
     12: <bindgen::ir::item::Item as bindgen::codegen::CodeGenerator>::codegen
     13: bindgen::ir::context::BindgenContext::gen
     14: bindgen::Builder::generate
     15: bindgen::main
   note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
   make[3]: *** [rust/Makefile:316: rust/uapi/uapi_generated.rs] Error 1
   make[3]: *** Deleting file 'rust/uapi/uapi_generated.rs'
>> thread 'main' panicked at '"ftrace_branch_data_union_(anonymous_at_include/linux/compiler_types_h_174_2)" is not a valid Ident', /opt/cross/rustc-1.68.2-bindgen-0.56.0/cargo/registry/src/github.com-1ecc6299db9ec823/proc-macro2-1.0.24/src/fallback.rs:693:9
   stack backtrace:
      0: rust_begin_unwind
                at /rustc/9eb3afe9ebe9c7d2b84b71002d44f4a0edac95e0/library/std/src/panicking.rs:575:5
      1: core::panicking::panic_fmt
                at /rustc/9eb3afe9ebe9c7d2b84b71002d44f4a0edac95e0/library/core/src/panicking.rs:64:14
      2: proc_macro2::fallback::Ident::_new
      3: proc_macro2::Ident::new
      4: bindgen::ir::context::BindgenContext::rust_ident
      5: <bindgen::ir::comp::CompInfo as bindgen::codegen::CodeGenerator>::codegen
      6: <bindgen::ir::ty::Type as bindgen::codegen::CodeGenerator>::codegen
      7: <bindgen::ir::item::Item as bindgen::codegen::CodeGenerator>::codegen
      8: <bindgen::ir::comp::CompInfo as bindgen::codegen::CodeGenerator>::codegen
      9: <bindgen::ir::ty::Type as bindgen::codegen::CodeGenerator>::codegen
     10: <bindgen::ir::item::Item as bindgen::codegen::CodeGenerator>::codegen
     11: <bindgen::ir::module::Module as bindgen::codegen::CodeGenerator>::codegen
     12: <bindgen::ir::item::Item as bindgen::codegen::CodeGenerator>::codegen
     13: bindgen::ir::context::BindgenContext::gen
     14: bindgen::Builder::generate
     15: bindgen::main
   note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
   make[3]: *** [rust/Makefile:310: rust/bindings/bindings_generated.rs] Error 1
   make[3]: *** Deleting file 'rust/bindings/bindings_generated.rs'
   make[3]: Target 'rust/' not remade because of errors.
   make[2]: *** [Makefile:1293: prepare] Error 2
   make[1]: *** [Makefile:234: __sub-make] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:234: __sub-make] Error 2
   make: Target 'prepare' not remade because of errors.

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