linux-next

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History

Andrii Nakryiko ed57802121 libbpf: Simplify BPF_CORE_READ_BITFIELD_PROBED usage

Streamline BPF_CORE_READ_BITFIELD_PROBED interface to follow
BPF_CORE_READ_BITFIELD (direct) and BPF_CORE_READ, in general, i.e., just
return read result or 0, if underlying bpf_probe_read() failed.

In practice, real applications rarely check bpf_probe_read() result, because
it has to always work or otherwise it's a bug. So propagating internal
bpf_probe_read() error from this macro hurts usability without providing real
benefits in practice. This patch fixes the issue and simplifies usage,
noticeable even in selftest itself.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20191106201500.2582438-1-andriin@fb.com

2019-11-06 13:54:59 -08:00

api

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 251

2019-06-05 17:30:26 +02:00

bpf

libbpf: Simplify BPF_CORE_READ_BITFIELD_PROBED usage

2019-11-06 13:54:59 -08:00

lockdep

lockdep/lib/tests: Test dynamic key registration

2019-02-28 07:55:48 +01:00

subcmd

libsubcmd: Make _FORTIFY_SOURCE defines dependent on the feature