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| author | Eric Dumazet <edumazet@google.com> | 2021-10-26 14:41:33 -0700 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2021-10-27 11:13:52 -0700 |
| commit | 61a0abaee2092eee69e44fe60336aa2f5b578938 (patch) | |
| tree | 5ee181827d5064079aaa77ce0e3523a70daf1e86 /arch/riscv/net/bpf_jit_comp64.c | |
| parent | d979617aa84d96acca44c2f5778892b4565e322f (diff) | |
| download | linux-61a0abaee2092eee69e44fe60336aa2f5b578938.tar.gz linux-61a0abaee2092eee69e44fe60336aa2f5b578938.tar.bz2 linux-61a0abaee2092eee69e44fe60336aa2f5b578938.zip | |
bpf: Use u64_stats_t in struct bpf_prog_stats
Commit 316580b69d0a ("u64_stats: provide u64_stats_t type")
fixed possible load/store tearing on 64bit arches.
For instance the following C code
stats->nsecs += sched_clock() - start;
Could be rightfully implemented like this by a compiler,
confusing concurrent readers a lot:
stats->nsecs += sched_clock();
// arbitrary delay
stats->nsecs -= start;
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211026214133.3114279-4-eric.dumazet@gmail.com
Diffstat (limited to 'arch/riscv/net/bpf_jit_comp64.c')
0 files changed, 0 insertions, 0 deletions