scripts: Exclude Rust CUs with pahole

Version 1.24 of pahole has the capability to exclude compilation units
(CUs) of specific languages. Rust, as of writing, is not currently
supported by pahole and if it's used with a build that has BTF debugging
enabled it results in malformed kernel and module binaries (see
#735). So it's better for pahole to exclude Rust
CUs until support for it arrives.

Signed-off-by: Martin Rodriguez Reboredo <yakoyoku@gmail.com>

Author: YakoYakoYokuYoku

init/Kconfig

@@ -1917,7 +1917,7 @@ config RUST
 	depends on !MODVERSIONS
 	depends on !GCC_PLUGINS
 	depends on !RANDSTRUCT
-	depends on !DEBUG_INFO_BTF
+	depends on !DEBUG_INFO_BTF || PAHOLE_VERSION >= 124
 	select CONSTRUCTORS
 	help
 	  Enables Rust support in the kernel.

scripts/pahole-flags.sh

@@ -19,5 +19,8 @@ fi
 if [ "${pahole_ver}" -ge "122" ]; then
 	extra_paholeopt="${extra_paholeopt} -j"
 fi
+if [ "${pahole_ver}" -ge "124" ]; then
+	extra_paholeopt="${extra_paholeopt} --lang_exclude=rust"
+fi
 
 echo ${extra_paholeopt}