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| author | Daniel Borkmann | 2016-04-13 00:10:53 +0200 |
|---|---|---|
| committer | David S. Miller | 2016-04-15 03:40:42 +0200 |
| commit | 02413cabd6b67f1444f153ea85d44076deae2056 (patch) | |
| tree | 8d656100a8e523f2f9a5256884f6c868c0ae94df /samples/bpf/tracex1_kern.c | |
| parent | bpf: convert relevant helper args to ARG_PTR_TO_RAW_STACK (diff) | |
| download | kernel-qcow2-linux-02413cabd6b67f1444f153ea85d44076deae2056.tar.gz kernel-qcow2-linux-02413cabd6b67f1444f153ea85d44076deae2056.tar.xz kernel-qcow2-linux-02413cabd6b67f1444f153ea85d44076deae2056.zip | |
bpf, samples: don't zero data when not needed
Remove the zero initialization in the sample programs where appropriate.
Note that this is an optimization which is now possible, old programs
still doing the zero initialization are just fine as well. Also, make
sure we don't have padding issues when we don't memset() the entire
struct anymore.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'samples/bpf/tracex1_kern.c')
| -rw-r--r-- | samples/bpf/tracex1_kern.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/samples/bpf/tracex1_kern.c b/samples/bpf/tracex1_kern.c index 3f450a8fa1f3..107da148820f 100644 --- a/samples/bpf/tracex1_kern.c +++ b/samples/bpf/tracex1_kern.c @@ -23,16 +23,14 @@ int bpf_prog1(struct pt_regs *ctx) /* attaches to kprobe netif_receive_skb, * looks for packets on loobpack device and prints them */ - char devname[IFNAMSIZ] = {}; + char devname[IFNAMSIZ]; struct net_device *dev; struct sk_buff *skb; int len; /* non-portable! works for the given kernel only */ skb = (struct sk_buff *) PT_REGS_PARM1(ctx); - dev = _(skb->dev); - len = _(skb->len); bpf_probe_read(devname, sizeof(devname), dev->name); |