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bpf: refactor propagate_liveness to eliminate duplicated for loop 

Propagation for register and stack slot are finished in separate for loop,
while they are perfect to be put into a single loop.

This could also let them share some common variables in later patches.

Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
hifive-unleashed-5.2
Jiong Wang 2019-04-12 22:59:34 +01:00 committed by Alexei Starovoitov
parent 51356ac89b
commit 1b04aee7e2
1 changed files with 1 additions and 3 deletions
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4
kernel/bpf/verifier.c
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@ -6254,10 +6254,8 @@ static int propagate_liveness(struct bpf_verifier_env *env,
return err;
}
}
}
/* ... and stack slots */
for (frame = 0; frame <= vstate->curframe; frame++) {
/* Propagate stack slots. */
state = vstate->frame[frame];
parent = vparent->frame[frame];
for (i = 0; i < state->allocated_stack / BPF_REG_SIZE &&