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    Subject[PATCH 4.14 20/62] samples: bpf: Replace symbol compare of trace_event
    Date
    From: Daniel T. Lee <danieltimlee@gmail.com>

    [ Upstream commit bba1b2a890253528c45aa66cf856f289a215bfbc ]

    Previously, when this sample is added, commit 1c47910ef8013
    ("samples/bpf: add perf_event+bpf example"), a symbol 'sys_read' and
    'sys_write' has been used without no prefixes. But currently there are
    no exact symbols with these under kallsyms and this leads to failure.

    This commit changes exact compare to substring compare to keep compatible
    with exact symbol or prefixed symbol.

    Fixes: 1c47910ef8013 ("samples/bpf: add perf_event+bpf example")
    Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com>
    Signed-off-by: Alexei Starovoitov <ast@kernel.org>
    Link: https://lore.kernel.org/bpf/20191205080114.19766-2-danieltimlee@gmail.com
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    samples/bpf/trace_event_user.c | 4 ++--
    1 file changed, 2 insertions(+), 2 deletions(-)

    diff --git a/samples/bpf/trace_event_user.c b/samples/bpf/trace_event_user.c
    index c7d525e5696e..8c7445874662 100644
    --- a/samples/bpf/trace_event_user.c
    +++ b/samples/bpf/trace_event_user.c
    @@ -34,9 +34,9 @@ static void print_ksym(__u64 addr)
    return;
    sym = ksym_search(addr);
    printf("%s;", sym->name);
    - if (!strcmp(sym->name, "sys_read"))
    + if (!strstr(sym->name, "sys_read"))
    sys_read_seen = true;
    - else if (!strcmp(sym->name, "sys_write"))
    + else if (!strstr(sym->name, "sys_write"))
    sys_write_seen = true;
    }

    --
    2.20.1


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