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objtool: Optimize find_section_by_name()
authorPeter Zijlstra <peterz@infradead.org>
Thu, 12 Mar 2020 08:32:10 +0000 (09:32 +0100)
committerPeter Zijlstra <peterz@infradead.org>
Wed, 25 Mar 2020 17:28:29 +0000 (18:28 +0100)
commitee3ad986b52d343cd9141c119a05cc7cce0a5176
tree183b84e1a566c504bffc71cb65afea6270d96135tree | snapshot
parent15d53f556994f256e236d585c6e51a98237466c7commit | diff
objtool: Optimize find_section_by_name()

In order to avoid yet another linear search of (20k) sections, add a
name based hash.

This reduces objtool runtime on vmlinux.o by some 10s to around 35s.

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/20200324160924.440174280@infradead.org
tools/objtool/elf.c diff | blob | history
tools/objtool/elf.h diff | blob | history
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