On 10/28/19 6:15 AM, Toke Høiland-Jørgensen wrote:
> Jesper Dangaard Brouer <brouer@xxxxxxxxxx> writes:
>
>> On Sun, 27 Oct 2019 21:53:19 +0100
>> Toke Høiland-Jørgensen <toke@xxxxxxxxxx> wrote:
>>
>>> diff --git a/tools/testing/selftests/bpf/progs/test_pinning.c b/tools/testing/selftests/bpf/progs/test_pinning.c
>>> new file mode 100644
>>> index 000000000000..ff2d7447777e
>>> --- /dev/null
>>> +++ b/tools/testing/selftests/bpf/progs/test_pinning.c
>>> @@ -0,0 +1,29 @@
>>> +// SPDX-License-Identifier: GPL-2.0
>>> +
>>> +#include <linux/bpf.h>
>>> +#include "bpf_helpers.h"
>>> +
>>> +int _version SEC("version") = 1;
>>> +
>>> +struct {
>>> + __uint(type, BPF_MAP_TYPE_ARRAY);
>>> + __uint(max_entries, 1);
>>> + __type(key, __u32);
>>> + __type(value, __u64);
>>> + __uint(pinning, LIBBPF_PIN_BY_NAME);
>>> +} pinmap SEC(".maps");
>>
>> So, this is the new BTF-defined maps syntax.
>>
>> Please remind me, what version of LLVM do we need to compile this?
>
> No idea what the minimum version is. I'm running LLVM 9.0 :)
LLVM 9.0 starts to support .maps.
There is no dependency on pahole.
>
>> Or was there a dependency on pahole?
>
> Don't think so...
>
> -Toke
>
