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author | Michal Simek <monstr@monstr.eu> | 2009-12-10 16:15:44 +0300 |
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committer | Michal Simek <monstr@monstr.eu> | 2009-12-14 10:44:01 +0300 |
commit | 7d241ff0567b9503d79ee775c40927d09b509f83 (patch) | |
tree | 8de1af72c5643416ee427edc7e9ff2170e0d73db /lib/ts_kmp.c | |
parent | 6d9e60ce30a1be35491c74df00aaa25d869f8a02 (diff) | |
download | linux-7d241ff0567b9503d79ee775c40927d09b509f83.tar.xz |
microblaze: ftrace: Add dynamic trace support
With dynamic function tracer, by default, _mcount is defined as an
"empty" function, it returns directly without any more action. When
enabling it in user-space, it will jump to a real tracing
function(ftrace_caller), and do the real job for us.
Differ from the static function tracer, dynamic function tracer provides
two functions ftrace_make_call()/ftrace_make_nop() to enable/disable the
tracing of some indicated kernel functions(set_ftrace_filter).
In the kernel version, there is only one "_mcount" string for every
kernel function, so, we just need to match this one in mcount_regex of
scripts/recordmcount.pl.
For more information please look at code and Documentation/trace folder.
Steven ACK that scripts/recordmcount.pl part.
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'lib/ts_kmp.c')
0 files changed, 0 insertions, 0 deletions