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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-05-11 18:08:12 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-05-12 09:59:52 -0300 |
| commit | 0ceb8f6e6cbafee0fa0e671e48213e24fae887f7 (patch) | |
| tree | 0c29de24ec57b0f158465255ed3ba3d9c4fb4f16 /tools/perf/util | |
| parent | 8f1960138baf8a6c139917ecbc032e7916d109ef (diff) | |
| download | lwn-0ceb8f6e6cbafee0fa0e671e48213e24fae887f7.tar.gz lwn-0ceb8f6e6cbafee0fa0e671e48213e24fae887f7.zip | |
perf machine: No need to keep a refcnt for last_match
Since it is all associated with the refcount for keeping the thread
in the rbtree, it is excessive and unecessarily complex to hold a
refcont when changing machine->last_match.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-98kuesmfwtvhsrzx7ttyb0kt@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util')
| -rw-r--r-- | tools/perf/util/machine.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c index 8b0b307d91f4..34bf89f7f4f3 100644 --- a/tools/perf/util/machine.c +++ b/tools/perf/util/machine.c @@ -364,7 +364,7 @@ static struct thread *____machine__findnew_thread(struct machine *machine, return th; } - thread__zput(machine->last_match); + machine->last_match = NULL; } while (*p != NULL) { @@ -372,7 +372,7 @@ static struct thread *____machine__findnew_thread(struct machine *machine, th = rb_entry(parent, struct thread, rb_node); if (th->tid == tid) { - machine->last_match = thread__get(th); + machine->last_match = th; machine__update_thread_pid(machine, th, pid); return th; } @@ -409,7 +409,7 @@ static struct thread *____machine__findnew_thread(struct machine *machine, * It is now in the rbtree, get a ref */ thread__get(th); - machine->last_match = thread__get(th); + machine->last_match = th; } return th; @@ -1309,7 +1309,7 @@ out_problem: static void __machine__remove_thread(struct machine *machine, struct thread *th, bool lock) { if (machine->last_match == th) - thread__zput(machine->last_match); + machine->last_match = NULL; BUG_ON(th->refcnt.counter == 0); if (lock) |