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    Subject[tip:tracing/ftrace] tracepoints: dont update zero-sized tracepoint sections
    Commit-ID:  ec625cb29e66824f7ce41082617aeb93fa4e42e2
    Gitweb: http://git.kernel.org/tip/ec625cb29e66824f7ce41082617aeb93fa4e42e2
    Author: Ingo Molnar <mingo@elte.hu>
    AuthorDate: Wed, 18 Mar 2009 19:54:04 +0100
    Commit: Ingo Molnar <mingo@elte.hu>
    CommitDate: Wed, 18 Mar 2009 19:55:00 +0100

    tracepoints: dont update zero-sized tracepoint sections

    Zero-sized tracepoint sections can occur if tracing is enabled but
    no tracepoint is defined. Do not emit a warning in that case.

    Cc: Frederic Weisbecker <fweisbec@gmail.com>
    Cc: Steven Rostedt <rostedt@goodmis.org>
    Cc: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
    LKML-Reference: <1237394936.3132.1.camel@localhost.localdomain>
    Signed-off-by: Ingo Molnar <mingo@elte.hu>


    ---
    kernel/tracepoint.c | 4 +---
    1 files changed, 1 insertions(+), 3 deletions(-)

    diff --git a/kernel/tracepoint.c b/kernel/tracepoint.c
    index adf2873..1ef5d3a 100644
    --- a/kernel/tracepoint.c
    +++ b/kernel/tracepoint.c
    @@ -278,10 +278,8 @@ tracepoint_update_probe_range(struct tracepoint *begin, struct tracepoint *end)
    struct tracepoint *iter;
    struct tracepoint_entry *mark_entry;

    - if (!begin) {
    - WARN_ON_ONCE(1);
    + if (!begin)
    return;
    - }

    mutex_lock(&tracepoints_mutex);
    for (iter = begin; iter < end; iter++) {

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