netdev - [PATCH v3 bpf-next 01/19] bpf: refactor propagate_liveness to eliminate duplicated for loop

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Message-Id: <1555106392-20117-2-git-send-email-jiong.wang@netronome.com>
Date:   Fri, 12 Apr 2019 22:59:34 +0100
From:   Jiong Wang <jiong.wang@...ronome.com>
To:     alexei.starovoitov@...il.com, daniel@...earbox.net
Cc:     bpf@...r.kernel.org, netdev@...r.kernel.org,
        oss-drivers@...ronome.com, Jiong Wang <jiong.wang@...ronome.com>
Subject: [PATCH v3 bpf-next 01/19] 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@...ronome.com>
---
 kernel/bpf/verifier.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 15ab6fa..da285df 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -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 &&
-- 
2.7.4