scripts: checkpatch: enable language-independent checks for Rust
Include Rust in the "source code files" category, so that the language-independent tests are checked for Rust too, and teach `checkpatch` about the comment style for Rust files. This enables the malformed SPDX check, the misplaced SPDX license tag check, the long line checks, the lines without a newline check and the embedded filename check. Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Co-developed-by: Alex Gaynor <alex.gaynor@gmail.com> Signed-off-by: Alex Gaynor <alex.gaynor@gmail.com> Co-developed-by: Wedson Almeida Filho <wedsonaf@google.com> Signed-off-by: Wedson Almeida Filho <wedsonaf@google.com> Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
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		@@ -3616,7 +3616,7 @@ sub process {
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				my $comment = "";
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				if ($realfile =~ /\.(h|s|S)$/) {
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					$comment = '/*';
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				} elsif ($realfile =~ /\.(c|dts|dtsi)$/) {
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				} elsif ($realfile =~ /\.(c|rs|dts|dtsi)$/) {
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					$comment = '//';
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				} elsif (($checklicenseline == 2) || $realfile =~ /\.(sh|pl|py|awk|tc|yaml)$/) {
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					$comment = '#';
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@@ -3664,7 +3664,7 @@ sub process {
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		}
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# check we are in a valid source file if not then ignore this hunk
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		next if ($realfile !~ /\.(h|c|s|S|sh|dtsi|dts)$/);
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		next if ($realfile !~ /\.(h|c|rs|s|S|sh|dtsi|dts)$/);
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# check for using SPDX-License-Identifier on the wrong line number
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		if ($realline != $checklicenseline &&
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