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bpf, samples: don't zero data when not needed

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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>
This commit is contained in:
Daniel Borkmann
2016-04-13 00:10:53 +02:00
committed by David S. Miller
parent 074f528eed
commit 02413cabd6
4 changed files with 12 additions and 12 deletions
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4
samples/bpf/tracex2_kern.c
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@@ -66,7 +66,7 @@ struct hist_key {
char comm[16];
u64 pid_tgid;
u64 uid_gid;
u32 index;
u64 index;
};
struct bpf_map_def SEC("maps") my_hist_map = {
@@ -82,7 +82,7 @@ int bpf_prog3(struct pt_regs *ctx)
long write_size = PT_REGS_PARM3(ctx);
long init_val = 1;
long *value;
struct hist_key key = {};
struct hist_key key;
key.index = log2l(write_size);
key.pid_tgid = bpf_get_current_pid_tgid();