diff options
| author | Hao Luo <haoluo@google.com> | 2020-09-29 16:50:47 -0700 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2020-10-02 15:00:49 -0700 |
| commit | eaa6bcb71ef6ed3dc18fc525ee7e293b06b4882b (patch) | |
| tree | f942e4cd04a29b8f50ec5a57db535da79fcdd068 /kernel/bpf/btf.c | |
| parent | 2c2f6abeff1322a61f5ad7ce0ecccabf53e4fad5 (diff) | |
bpf: Introduce bpf_per_cpu_ptr()
Add bpf_per_cpu_ptr() to help bpf programs access percpu vars.
bpf_per_cpu_ptr() has the same semantic as per_cpu_ptr() in the kernel
except that it may return NULL. This happens when the cpu parameter is
out of range. So the caller must check the returned value.
Signed-off-by: Hao Luo <haoluo@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200929235049.2533242-5-haoluo@google.com
Diffstat (limited to 'kernel/bpf/btf.c')
| -rw-r--r-- | kernel/bpf/btf.c | 10 |
1 files changed, 0 insertions, 10 deletions
diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c index 00569afe3d0d..ed7d02e8bc93 100644 --- a/kernel/bpf/btf.c +++ b/kernel/bpf/btf.c @@ -188,11 +188,6 @@ i < btf_type_vlen(struct_type); \ i++, member++) -#define for_each_vsi(i, struct_type, member) \ - for (i = 0, member = btf_type_var_secinfo(struct_type); \ - i < btf_type_vlen(struct_type); \ - i++, member++) - #define for_each_vsi_from(i, from, struct_type, member) \ for (i = from, member = btf_type_var_secinfo(struct_type) + from; \ i < btf_type_vlen(struct_type); \ @@ -598,11 +593,6 @@ static const struct btf_var *btf_type_var(const struct btf_type *t) return (const struct btf_var *)(t + 1); } -static const struct btf_var_secinfo *btf_type_var_secinfo(const struct btf_type *t) -{ - return (const struct btf_var_secinfo *)(t + 1); -} - static const struct btf_kind_operations *btf_type_ops(const struct btf_type *t) { return kind_ops[BTF_INFO_KIND(t->info)]; |