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bpf: move REG_LIVE_DONE check to clean_live_states() 

The next patch would add some relatively heavy-weight operation to
clean_live_states(), this operation can be skipped if REG_LIVE_DONE
is set. Move the check from clean_verifier_state() to
clean_verifier_state() as a small refactoring commit.

Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20250611200836.4135542-7-eddyz87@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
pull/1309/head
Eduard Zingerman 2025-06-11 13:08:32 -07:00 committed by Alexei Starovoitov
parent dfb2d4c64b
commit b5c677d8d9
1 changed files with 3 additions and 4 deletions
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7
kernel/bpf/verifier.c
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@ -18305,10 +18305,6 @@ static void clean_verifier_state(struct bpf_verifier_env *env,
{
int i;
if (st->frame[0]->regs[0].live & REG_LIVE_DONE)
/* all regs in this state in all frames were already marked */
return;
for (i = 0; i <= st->curframe; i++)
clean_func_state(env, st->frame[i]);
}
@ -18363,6 +18359,9 @@ static void clean_live_states(struct bpf_verifier_env *env, int insn,
if (sl->state.insn_idx != insn ||
!same_callsites(&sl->state, cur))
continue;
if (sl->state.frame[0]->regs[0].live & REG_LIVE_DONE)
/* all regs in this state in all frames were already marked */
continue;
clean_verifier_state(env, &sl->state);
}
}