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| author |   Hou Tao <houtao1@huawei.com> | 2022-01-27 16:32:40 +0800 |
|---|---|---|
| committer |   Daniel Borkmann <daniel@iogearbox.net> | 2022-01-27 22:47:05 +0100 |
| commit | b6ec79518ef0c84d1ed0f76b8af9592a75eb29b6 (patch) | |
| tree | 563e5069e58c36d50ffada0efadcf232fc4b125a /tools/testing | |
| parent | Merge branch 'bpf: add __user tagging support in vmlinux BTF' (diff) | |
| download | wireguard-linux-b6ec79518ef0c84d1ed0f76b8af9592a75eb29b6.tar.xz wireguard-linux-b6ec79518ef0c84d1ed0f76b8af9592a75eb29b6.zip | |
bpf, x86: Remove unnecessary handling of BPF_SUB atomic op
According to the LLVM commit (https://reviews.llvm.org/D72184),
sync_fetch_and_sub() is implemented as a negation followed by
sync_fetch_and_add(), so there will be no BPF_SUB op, thus just
remove it. BPF_SUB is also rejected by the verifier anyway.
Signed-off-by: Hou Tao <houtao1@huawei.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Brendan Jackman <jackmanb@google.com>
Link: https://lore.kernel.org/bpf/20220127083240.1425481-1-houtao1@huawei.com
Diffstat (limited to 'tools/testing')
0 files changed, 0 insertions, 0 deletions