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drivers/perf: convert sysfs scnprintf family to sysfs_emit_at() and sysfs_emit()

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Use the generic sysfs_emit_at() and sysfs_emit() function to take place
of scnprintf()

Signed-off-by: Qi Liu <liuqi115@huawei.com>
Link: https://lore.kernel.org/r/1616148273-16374-3-git-send-email-liuqi115@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Qi Liu 2021-03-19 18:04:32 +08:00 committed by Will Deacon
parent 700a9cf052
commit 9ec9f9cf86
1 changed files with 11 additions and 16 deletions
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27
drivers/perf/arm-ccn.c
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@ -326,43 +326,38 @@ static ssize_t arm_ccn_pmu_event_show(struct device *dev,
struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev));
struct arm_ccn_pmu_event *event = container_of(attr,
struct arm_ccn_pmu_event, attr);
ssize_t res;
int res;
res = scnprintf(buf, PAGE_SIZE, "type=0x%x", event->type);
res = sysfs_emit(buf, "type=0x%x", event->type);
if (event->event)
res += scnprintf(buf + res, PAGE_SIZE - res, ",event=0x%x",
event->event);
res += sysfs_emit_at(buf, res, ",event=0x%x", event->event);
if (event->def)
res += scnprintf(buf + res, PAGE_SIZE - res, ",%s",
event->def);
res += sysfs_emit_at(buf, res, ",%s", event->def);
if (event->mask)
res += scnprintf(buf + res, PAGE_SIZE - res, ",mask=0x%x",
event->mask);
res += sysfs_emit_at(buf, res, ",mask=0x%x", event->mask);
/* Arguments required by an event */
switch (event->type) {
case CCN_TYPE_CYCLES:
break;
case CCN_TYPE_XP:
res += scnprintf(buf + res, PAGE_SIZE - res,
",xp=?,vc=?");
res += sysfs_emit_at(buf, res, ",xp=?,vc=?");
if (event->event == CCN_EVENT_WATCHPOINT)
res += scnprintf(buf + res, PAGE_SIZE - res,
res += sysfs_emit_at(buf, res,
",port=?,dir=?,cmp_l=?,cmp_h=?,mask=?");
else
res += scnprintf(buf + res, PAGE_SIZE - res,
",bus=?");
res += sysfs_emit_at(buf, res, ",bus=?");
break;
case CCN_TYPE_MN:
res += scnprintf(buf + res, PAGE_SIZE - res, ",node=%d", ccn->mn_id);
res += sysfs_emit_at(buf, res, ",node=%d", ccn->mn_id);
break;
default:
res += scnprintf(buf + res, PAGE_SIZE - res, ",node=?");
res += sysfs_emit_at(buf, res, ",node=?");
break;
}
res += scnprintf(buf + res, PAGE_SIZE - res, "\n");
res += sysfs_emit_at(buf, res, "\n");
return res;
}