These two functions are used to implement the kprobes feature so they
can't be kprobed.

Fixes: c22b0bcb ("riscv: Add kprobes supported")
Cc: stable@vger.kernel.org
Signed-off-by: NJisheng Zhang <jszhang@kernel.org>
Reviewed-by: NMasami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: NPalmer Dabbelt <palmerdabbelt@google.com>