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 <[email protected]>
Acked-by: Alexei Starovoitov <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
diff --git a/samples/bpf/tracex2_kern.c b/samples/bpf/tracex2_kern.c
index 6d6eefd..5e11c20 100644
--- a/samples/bpf/tracex2_kern.c
+++ b/samples/bpf/tracex2_kern.c
@@ -66,7 +66,7 @@
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 @@
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();
