[PATCH 5/9] perf tools: Use dedicated non-atomic clear/set bit helpers

From: Sean Christopherson
Date: Fri Nov 18 2022 - 20:54:04 EST

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Use the dedicated non-atomic helpers for {clear,set}_bit() and their
test variants, i.e. the double-underscore versions. Depsite being
defined in atomic.h, and despite the kernel versions being atomic in the
kernel, tools' {clear,set}_bit() helpers aren't actually atomic. Move
to the double-underscore versions so that the versions that are expected
to be atomic (for kernel developers) can be made atomic without affecting
users that don't want atomic operations.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
---
tools/perf/bench/find-bit-bench.c | 2 +-
tools/perf/builtin-c2c.c | 6 +++---
tools/perf/builtin-kwork.c | 6 +++---
tools/perf/builtin-record.c | 6 +++---
tools/perf/builtin-sched.c | 2 +-
tools/perf/tests/bitmap.c | 2 +-
tools/perf/tests/mem2node.c | 2 +-
tools/perf/util/affinity.c | 4 ++--
tools/perf/util/header.c | 8 ++++----
tools/perf/util/mmap.c | 6 +++---
tools/perf/util/pmu.c | 2 +-
tools/perf/util/scripting-engines/trace-event-perl.c | 2 +-
tools/perf/util/scripting-engines/trace-event-python.c | 2 +-
tools/perf/util/session.c | 2 +-
tools/perf/util/svghelper.c | 2 +-
15 files changed, 27 insertions(+), 27 deletions(-)

diff --git a/tools/perf/bench/find-bit-bench.c b/tools/perf/bench/find-bit-bench.c
index 22b5cfe97023..d103c3136983 100644
--- a/tools/perf/bench/find-bit-bench.c
+++ b/tools/perf/bench/find-bit-bench.c
@@ -70,7 +70,7 @@ static int do_for_each_set_bit(unsigned int num_bits)
bitmap_zero(to_test, num_bits);
skip = num_bits / set_bits;
for (i = 0; i < num_bits; i += skip)
- set_bit(i, to_test);
+ __set_bit(i, to_test);

for (i = 0; i < outer_iterations; i++) {
old = accumulator;
diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index a9190458d2d5..52d94c7dd836 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -230,7 +230,7 @@ static void c2c_he__set_cpu(struct c2c_hist_entry *c2c_he,
"WARNING: no sample cpu value"))
return;

- set_bit(sample->cpu, c2c_he->cpuset);
+ __set_bit(sample->cpu, c2c_he->cpuset);
}

static void c2c_he__set_node(struct c2c_hist_entry *c2c_he,
@@ -247,7 +247,7 @@ static void c2c_he__set_node(struct c2c_hist_entry *c2c_he,
if (WARN_ONCE(node < 0, "WARNING: failed to find node\n"))
return;

- set_bit(node, c2c_he->nodeset);
+ __set_bit(node, c2c_he->nodeset);

if (c2c_he->paddr != sample->phys_addr) {
c2c_he->paddr_cnt++;
@@ -2318,7 +2318,7 @@ static int setup_nodes(struct perf_session *session)
continue;

perf_cpu_map__for_each_cpu(cpu, idx, map) {
- set_bit(cpu.cpu, set);
+ __set_bit(cpu.cpu, set);

if (WARN_ONCE(cpu2node[cpu.cpu] != -1, "node/cpu topology bug"))
return -EINVAL;
diff --git a/tools/perf/builtin-kwork.c b/tools/perf/builtin-kwork.c
index fb8c63656ad8..1f63e24f704e 100644
--- a/tools/perf/builtin-kwork.c
+++ b/tools/perf/builtin-kwork.c
@@ -216,7 +216,7 @@ static struct kwork_atom *atom_new(struct perf_kwork *kwork,
list_add_tail(&page->list, &kwork->atom_page_list);

found_atom:
- set_bit(i, page->bitmap);
+ __set_bit(i, page->bitmap);
atom->time = sample->time;
atom->prev = NULL;
atom->page_addr = page;
@@ -229,8 +229,8 @@ static void atom_free(struct kwork_atom *atom)
if (atom->prev != NULL)
atom_free(atom->prev);

- clear_bit(atom->bit_inpage,
- ((struct kwork_atom_page *)atom->page_addr)->bitmap);
+ __clear_bit(atom->bit_inpage,
+ ((struct kwork_atom_page *)atom->page_addr)->bitmap);
}

static void atom_del(struct kwork_atom *atom)
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index e128b855ddde..2711c141c5bf 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -3555,7 +3555,7 @@ static int record__mmap_cpu_mask_init(struct mmap_cpu_mask *mask, struct perf_cp
/* Return ENODEV is input cpu is greater than max cpu */
if ((unsigned long)cpu.cpu > mask->nbits)
return -ENODEV;
- set_bit(cpu.cpu, mask->bits);
+ __set_bit(cpu.cpu, mask->bits);
}

return 0;
@@ -3627,8 +3627,8 @@ static int record__init_thread_cpu_masks(struct record *rec, struct perf_cpu_map
pr_debug("nr_threads: %d\n", rec->nr_threads);

for (t = 0; t < rec->nr_threads; t++) {
- set_bit(perf_cpu_map__cpu(cpus, t).cpu, rec->thread_masks[t].maps.bits);
- set_bit(perf_cpu_map__cpu(cpus, t).cpu, rec->thread_masks[t].affinity.bits);
+ __set_bit(perf_cpu_map__cpu(cpus, t).cpu, rec->thread_masks[t].maps.bits);
+ __set_bit(perf_cpu_map__cpu(cpus, t).cpu, rec->thread_masks[t].affinity.bits);
if (verbose) {
pr_debug("thread_masks[%d]: ", t);
mmap_cpu_mask__scnprintf(&rec->thread_masks[t].maps, "maps");
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index f93737eef07b..86e18575c9be 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -1573,7 +1573,7 @@ static int map_switch_event(struct perf_sched *sched, struct evsel *evsel,

if (sched->map.comp) {
cpus_nr = bitmap_weight(sched->map.comp_cpus_mask, MAX_CPUS);
- if (!test_and_set_bit(this_cpu.cpu, sched->map.comp_cpus_mask)) {
+ if (!__test_and_set_bit(this_cpu.cpu, sched->map.comp_cpus_mask)) {
sched->map.comp_cpus[cpus_nr++] = this_cpu;
new_cpu = true;
}
diff --git a/tools/perf/tests/bitmap.c b/tools/perf/tests/bitmap.c
index 4965dd666956..0173f5402a35 100644
--- a/tools/perf/tests/bitmap.c
+++ b/tools/perf/tests/bitmap.c
@@ -18,7 +18,7 @@ static unsigned long *get_bitmap(const char *str, int nbits)

if (map && bm) {
for (i = 0; i < perf_cpu_map__nr(map); i++)
- set_bit(perf_cpu_map__cpu(map, i).cpu, bm);
+ __set_bit(perf_cpu_map__cpu(map, i).cpu, bm);
}

if (map)
diff --git a/tools/perf/tests/mem2node.c b/tools/perf/tests/mem2node.c
index 4c96829510c9..a0e88c496107 100644
--- a/tools/perf/tests/mem2node.c
+++ b/tools/perf/tests/mem2node.c
@@ -33,7 +33,7 @@ static unsigned long *get_bitmap(const char *str, int nbits)
int i;

perf_cpu_map__for_each_cpu(cpu, i, map)
- set_bit(cpu.cpu, bm);
+ __set_bit(cpu.cpu, bm);
}

if (map)
diff --git a/tools/perf/util/affinity.c b/tools/perf/util/affinity.c
index 4ee96b3c755b..38dc4524b7e8 100644
--- a/tools/perf/util/affinity.c
+++ b/tools/perf/util/affinity.c
@@ -58,14 +58,14 @@ void affinity__set(struct affinity *a, int cpu)
return;

a->changed = true;
- set_bit(cpu, a->sched_cpus);
+ __set_bit(cpu, a->sched_cpus);
/*
* We ignore errors because affinity is just an optimization.
* This could happen for example with isolated CPUs or cpusets.
* In this case the IPIs inside the kernel's perf API still work.
*/
sched_setaffinity(0, cpu_set_size, (cpu_set_t *)a->sched_cpus);
- clear_bit(cpu, a->sched_cpus);
+ __clear_bit(cpu, a->sched_cpus);
}

static void __affinity__cleanup(struct affinity *a)
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 98dfaf84bd13..dc2ae397d400 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -79,12 +79,12 @@ struct perf_file_attr {

void perf_header__set_feat(struct perf_header *header, int feat)
{
- set_bit(feat, header->adds_features);
+ __set_bit(feat, header->adds_features);
}

void perf_header__clear_feat(struct perf_header *header, int feat)
{
- clear_bit(feat, header->adds_features);
+ __clear_bit(feat, header->adds_features);
}

bool perf_header__has_feat(const struct perf_header *header, int feat)
@@ -1358,7 +1358,7 @@ static int memory_node__read(struct memory_node *n, unsigned long idx)
rewinddir(dir);

for_each_memory(phys, dir) {
- set_bit(phys, n->set);
+ __set_bit(phys, n->set);
}

closedir(dir);
@@ -3952,7 +3952,7 @@ int perf_file_header__read(struct perf_file_header *header,

if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
- set_bit(HEADER_BUILD_ID, header->adds_features);
+ __set_bit(HEADER_BUILD_ID, header->adds_features);
}
}

diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index a4dff881be39..49093b21ee2d 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c
@@ -111,7 +111,7 @@ static int perf_mmap__aio_bind(struct mmap *map, int idx, struct perf_cpu cpu, i
pr_err("Failed to allocate node mask for mbind: error %m\n");
return -1;
}
- set_bit(node_index, node_mask);
+ __set_bit(node_index, node_mask);
if (mbind(data, mmap_len, MPOL_BIND, node_mask, node_index + 1 + 1, 0)) {
pr_err("Failed to bind [%p-%p] AIO buffer to node %lu: error %m\n",
data, data + mmap_len, node_index);
@@ -256,7 +256,7 @@ static void build_node_mask(int node, struct mmap_cpu_mask *mask)
for (idx = 0; idx < nr_cpus; idx++) {
cpu = perf_cpu_map__cpu(cpu_map, idx); /* map c index to online cpu index */
if (cpu__get_node(cpu) == node)
- set_bit(cpu.cpu, mask->bits);
+ __set_bit(cpu.cpu, mask->bits);
}
}

@@ -270,7 +270,7 @@ static int perf_mmap__setup_affinity_mask(struct mmap *map, struct mmap_params *
if (mp->affinity == PERF_AFFINITY_NODE && cpu__max_node() > 1)
build_node_mask(cpu__get_node(map->core.cpu), &map->affinity_mask);
else if (mp->affinity == PERF_AFFINITY_CPU)
- set_bit(map->core.cpu.cpu, map->affinity_mask.bits);
+ __set_bit(map->core.cpu.cpu, map->affinity_mask.bits);

return 0;
}
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 03284059175f..371d8f7a3de3 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -1513,7 +1513,7 @@ void perf_pmu__set_format(unsigned long *bits, long from, long to)

memset(bits, 0, BITS_TO_BYTES(PERF_PMU_FORMAT_BITS));
for (b = from; b <= to; b++)
- set_bit(b, bits);
+ __set_bit(b, bits);
}

void perf_pmu__del_formats(struct list_head *formats)
diff --git a/tools/perf/util/scripting-engines/trace-event-perl.c b/tools/perf/util/scripting-engines/trace-event-perl.c
index a5d945415bbc..5b602b6d4685 100644
--- a/tools/perf/util/scripting-engines/trace-event-perl.c
+++ b/tools/perf/util/scripting-engines/trace-event-perl.c
@@ -365,7 +365,7 @@ static void perl_process_tracepoint(struct perf_sample *sample,

sprintf(handler, "%s::%s", event->system, event->name);

- if (!test_and_set_bit(event->id, events_defined))
+ if (!__test_and_set_bit(event->id, events_defined))
define_event_symbols(event, handler, event->print_fmt.args);

s = nsecs / NSEC_PER_SEC;
diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c
index 1f2040f36d4e..0f229fa29163 100644
--- a/tools/perf/util/scripting-engines/trace-event-python.c
+++ b/tools/perf/util/scripting-engines/trace-event-python.c
@@ -933,7 +933,7 @@ static void python_process_tracepoint(struct perf_sample *sample,

sprintf(handler_name, "%s__%s", event->system, event->name);

- if (!test_and_set_bit(event->id, events_defined))
+ if (!__test_and_set_bit(event->id, events_defined))
define_event_symbols(event, handler_name, event->print_fmt.args);

handler = get_handler(handler_name);
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 1a4f10de29ff..873fd51ec1b2 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -2748,7 +2748,7 @@ int perf_session__cpu_bitmap(struct perf_session *session,
goto out_delete_map;
}

- set_bit(cpu.cpu, cpu_bitmap);
+ __set_bit(cpu.cpu, cpu_bitmap);
}

err = 0;
diff --git a/tools/perf/util/svghelper.c b/tools/perf/util/svghelper.c
index 1e0c731fc539..5c62d3118c41 100644
--- a/tools/perf/util/svghelper.c
+++ b/tools/perf/util/svghelper.c
@@ -741,7 +741,7 @@ static int str_to_bitmap(char *s, cpumask_t *b, int nr_cpus)
break;
}

- set_bit(c.cpu, cpumask_bits(b));
+ __set_bit(c.cpu, cpumask_bits(b));
}

perf_cpu_map__put(m);
--
2.38.1.584.g0f3c55d4c2-goog

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