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objtool: Optimize find_section_by_index()
authorPeter Zijlstra <peterz@infradead.org>
Tue, 10 Mar 2020 17:43:35 +0000 (18:43 +0100)
committerPeter Zijlstra <peterz@infradead.org>
Wed, 25 Mar 2020 17:28:28 +0000 (18:28 +0100)
commit530389968739883a61192767e1c215653ba4ba2b
treed2963d5d64e6c16f6d72ef84053fc34dda57db35tree | snapshot
parent1e11f3fdc326d7466e43185ea943b6156143387ccommit | diff
objtool: Optimize find_section_by_index()

In order to avoid a linear search (over 20k entries), add an
section_hash to the elf object.

This reduces objtool on vmlinux.o from a few minutes to around 45
seconds.

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/20200324160924.381249993@infradead.org
tools/objtool/elf.c diff | blob | history
tools/objtool/elf.h diff | blob | history
Domain: System / Kernel;