kallsyms: unexport kallsyms_lookup_name() and kallsyms_on_each_symbol()

kallsyms_lookup_name() and kallsyms_on_each_symbol() are exported to
modules despite having no in-tree users and being wide open to abuse by
out-of-tree modules that can use them as a method to invoke arbitrary
non-exported kernel functions.

Unexport kallsyms_lookup_name() and kallsyms_on_each_symbol().

Signed-off-by: Will Deacon <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Reviewed-by: Greg Kroah-Hartman <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Reviewed-by: Masami Hiramatsu <[email protected]>
Reviewed-by: Quentin Perret <[email protected]>
Acked-by: Alexei Starovoitov <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: K.Prasad <[email protected]>
Cc: Miroslav Benes <[email protected]>
Cc: Petr Mladek <[email protected]>
Cc: Joe Lawrence <[email protected]>
Cc: Mathieu Desnoyers <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Linus Torvalds <[email protected]>

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