perf tool: Fix gcc 4.6.0 issues
GCC 4.6.0 in Fedora rawhide turned up some compile errors in tools/perf
due to the -Werror=unused-but-set-variable flag.
I've gone through and annotated some of the assignments that had side
effects (ie: return value from a function) with the __used annotation,
and in some cases, just removed unused code.
In a few cases, we were assigning something useful, but not using it in
later parts of the function.
kyle@dreadnought:~/src% gcc --version
gcc (GCC) 4.6.0 20110122 (Red Hat 4.6.0-0.3)
Cc: Ingo Molnar <mingo@redhat.com>
LKML-Reference: <20110124161304.GK27353@bombadil.infradead.org>
Signed-off-by: Kyle McMartin <kyle@redhat.com>
[ committer note: Fixed up the annotation fixes, as that code moved recently ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index ae26211..a32f411 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -369,11 +369,6 @@
process_sched_event(struct task_desc *this_task __used, struct sched_atom *atom)
{
int ret = 0;
- u64 now;
- long long delta;
-
- now = get_nsecs();
- delta = start_time + atom->timestamp - now;
switch (atom->type) {
case SCHED_EVENT_RUN:
@@ -562,7 +557,7 @@
static void run_one_test(void)
{
- u64 T0, T1, delta, avg_delta, fluct, std_dev;
+ u64 T0, T1, delta, avg_delta, fluct;
T0 = get_nsecs();
wait_for_tasks();
@@ -578,7 +573,6 @@
else
fluct = delta - avg_delta;
sum_fluct += fluct;
- std_dev = sum_fluct / nr_runs / sqrt(nr_runs);
if (!run_avg)
run_avg = delta;
run_avg = (run_avg*9 + delta)/10;
@@ -799,7 +793,7 @@
u64 timestamp,
struct thread *thread __used)
{
- struct task_desc *prev, *next;
+ struct task_desc *prev, __used *next;
u64 timestamp0;
s64 delta;
@@ -1404,7 +1398,7 @@
u64 timestamp,
struct thread *thread __used)
{
- struct thread *sched_out, *sched_in;
+ struct thread *sched_out __used, *sched_in;
int new_shortname;
u64 timestamp0;
s64 delta;