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It's useful to compare if two tasks are the same task or not. Rust Binder wants this to check if a certain task is equal to the group leader of current. Reviewed-by: Gary Guo <gary@garyguo.net> Signed-off-by: Alice Ryhl <aliceryhl@google.com> Link: https://patch.msgid.link/20260324-close-fd-check-current-v3-2-b94274bedac7@google.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>