objtool: Optimize find_symbol_*() and read_symbols()
All of:
read_symbols(), find_symbol_by_offset(), find_symbol_containing(),
find_containing_func()
do a linear search of the symbols. Add an RB tree to make it go
faster.
This about halves objtool runtime on vmlinux.o, from 34s to 18s.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lkml.kernel.org/r/20200324160924.499016559@infradead.org
3 files changed