> On May 1, 2018, at 7:09 PM, Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:
>
> Hi all,
>
> Today's linux-next merge of the bpf-next tree got a conflict in:
>
> tools/testing/selftests/bpf/test_progs.c
>
> between commit:
>
> a4e21ff8d9a3 ("bpf: minor fix to selftest test_stacktrace_build_id()")
>
> from the bpf tree and commit:
>
> 79b453501310 ("tools/bpf: add a test for bpf_get_stack with tracepoint prog")
>
> from the bpf-next tree.
>
> I fixed it up (see below) and can carry the fix as necessary. This
> is now fixed as far as linux-next is concerned, but any non trivial
> conflicts should be mentioned to your upstream maintainer when your tree
> is submitted for merging. You may also want to consider cooperating
> with the maintainer of the conflicting tree to minimise any particularly
> complex conflicts.
>
> --
> Cheers,
> Stephen Rothwell
>
> diff --cc tools/testing/selftests/bpf/test_progs.c
> index fac581f1c57f,aa336f0abebc..000000000000
> --- a/tools/testing/selftests/bpf/test_progs.c
> +++ b/tools/testing/selftests/bpf/test_progs.c
> @@@ -1137,9 -1193,14 +1193,14 @@@ static void test_stacktrace_build_id(vo
> err, errno))
> goto disable_pmu;
>
> + stack_amap_fd = bpf_find_map(__func__, obj, "stack_amap");
> + if (CHECK(stack_amap_fd < 0, "bpf_find_map stack_amap",
> + "err %d errno %d\n", err, errno))
> + goto disable_pmu;
> +
> assert(system("dd if=/dev/urandom of=/dev/zero count=4 2> /dev/null")
> == 0);
> - assert(system("./urandom_read if=/dev/urandom of=/dev/zero count=4 2> /dev/null") == 0);
> + assert(system("./urandom_read") == 0);
> /* disable stack trace collection */
> key = 0;
> val = 1;
> @@@ -1188,8 -1249,15 +1249,15 @@@
> previous_key = key;
> } while (bpf_map_get_next_key(stackmap_fd, &previous_key, &key) == 0);
>
> - CHECK(build_id_matches < 1, "build id match",
> - "Didn't find expected build ID from the map\n");
> + if (CHECK(build_id_matches < 1, "build id match",
> - "Didn't find expected build ID from the map"))
> ++ "Didn't find expected build ID from the map\n"))
^^^ Is there a "+" at the beginning of this line?
Thanks,
Song
> + goto disable_pmu;
> +
> + stack_trace_len = PERF_MAX_STACK_DEPTH
> + * sizeof(struct bpf_stack_build_id);
> + err = compare_stack_ips(stackmap_fd, stack_amap_fd, stack_trace_len);
> + CHECK(err, "compare_stack_ips stackmap vs. stack_amap",
> + "err %d errno %d\n", err, errno);
>
> disable_pmu:
> ioctl(pmu_fd, PERF_EVENT_IOC_DISABLE);
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