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objtool: Optimize find_symbol_by_name()
authorPeter Zijlstra <peterz@infradead.org>
Thu, 12 Mar 2020 09:17:38 +0000 (10:17 +0100)
committerPeter Zijlstra <peterz@infradead.org>
Wed, 25 Mar 2020 17:28:30 +0000 (18:28 +0100)
commit9b2a4b9c6679ea91b6d75af7679ba70476b6eaae
tree87c68d4378ff885e3efaba3cbad947f100c1c071tree | snapshot
parentda4e9dfec05ae87792a3582bc0bbf1bcbcddf1a5commit | diff
objtool: Optimize find_symbol_by_name()

Perf showed that find_symbol_by_name() takes time; add a symbol name
hash.

This shaves another second off of objtool on vmlinux.o runtime, down
to 15 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/20200324160924.676865656@infradead.org
tools/objtool/elf.c diff | blob | history
tools/objtool/elf.h diff | blob | history
Linux Kernel Source Tree.