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    Subject[116/151] tracing: Fix event format export
    2.6.32-stable review patch.  If anyone has any objections, please let us know.

    ------------------

    From: Johannes Berg <johannes@sipsolutions.net>

    commit 811cb50baf63461ce0bdb234927046131fc7fa8b upstream.

    For some reason the export of the event print format to userspace
    uses '#fmt' which breaks if the format string is anything but a plain
    string, for example if it is built with macros then the macro names
    are exported instead of their contents.

    Use
    "\"%s\"", fmt
    instead of
    "%s", #fmt
    to export the string and not the way it is built.

    For example, in net/mac80211/driver-trace.h for the trace event drv_start
    there is:

    TP_printk(
    LOCAL_PR_FMT, LOCAL_PR_ARG
    )

    Which use to produce:

    print fmt: LOCAL_PR_FMT, REC->wiphy_name

    Now produces:

    print fmt: "%s", REC->wiphy_name

    Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
    LKML-Reference: <20091113224009.GB23942@elte.hu>
    Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
    Cc: Ingo Molnar <mingo@elte.hu>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

    ---
    include/trace/ftrace.h | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/include/trace/ftrace.h
    +++ b/include/trace/ftrace.h
    @@ -159,7 +159,7 @@
    #undef __get_str

    #undef TP_printk
    -#define TP_printk(fmt, args...) "%s, %s\n", #fmt, __stringify(args)
    +#define TP_printk(fmt, args...) "\"%s\", %s\n", fmt, __stringify(args)

    #undef TP_fast_assign
    #define TP_fast_assign(args...) args



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