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| author |   Daniel Borkmann <daniel@iogearbox.net> | 2016-04-13 00:10:53 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2016-04-14 21:40:42 -0400 |
| commit | 02413cabd6b67f1444f153ea85d44076deae2056 (patch) | |
| tree | 8d656100a8e523f2f9a5256884f6c868c0ae94df /samples/bpf/tracex5_kern.c | |
| parent | bpf: convert relevant helper args to ARG_PTR_TO_RAW_STACK (diff) | |
| download | linux-dev-02413cabd6b67f1444f153ea85d44076deae2056.tar.xz linux-dev-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 '')
| -rw-r--r-- | samples/bpf/tracex5_kern.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/samples/bpf/tracex5_kern.c b/samples/bpf/tracex5_kern.c index b3f4295bf288..f95f232cbab9 100644 --- a/samples/bpf/tracex5_kern.c +++ b/samples/bpf/tracex5_kern.c @@ -22,7 +22,7 @@ struct bpf_map_def SEC("maps") progs = { SEC("kprobe/seccomp_phase1") int bpf_prog1(struct pt_regs *ctx) { - struct seccomp_data sd = {}; + struct seccomp_data sd; bpf_probe_read(&sd, sizeof(sd), (void *)PT_REGS_PARM1(ctx)); @@ -40,7 +40,7 @@ int bpf_prog1(struct pt_regs *ctx) /* we jump here when syscall number == __NR_write */ PROG(__NR_write)(struct pt_regs *ctx) { - struct seccomp_data sd = {}; + struct seccomp_data sd; bpf_probe_read(&sd, sizeof(sd), (void *)PT_REGS_PARM1(ctx)); if (sd.args[2] == 512) { @@ -53,7 +53,7 @@ PROG(__NR_write)(struct pt_regs *ctx) PROG(__NR_read)(struct pt_regs *ctx) { - struct seccomp_data sd = {}; + struct seccomp_data sd; bpf_probe_read(&sd, sizeof(sd), (void *)PT_REGS_PARM1(ctx)); if (sd.args[2] > 128 && sd.args[2] <= 1024) { |