Messages in this thread Patch in this message | | | From | Robert Richter <> | Subject | [PATCH v2 07/14] perf, persistent: Introduce get_persistent_event() | Date | Tue, 11 Jun 2013 18:42:33 +0200 |
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From: Robert Richter <robert.richter@linaro.org>
Reducing duplicate code by introducing function get_persistent_event() to get the descriptor of an persistent event.
Signed-off-by: Robert Richter <robert.richter@linaro.org> Signed-off-by: Robert Richter <rric@kernel.org> --- kernel/events/persistent.c | 36 ++++++++++++++++++++++-------------- 1 file changed, 22 insertions(+), 14 deletions(-)
diff --git a/kernel/events/persistent.c b/kernel/events/persistent.c index e6a7664..7d91871 100644 --- a/kernel/events/persistent.c +++ b/kernel/events/persistent.c @@ -16,6 +16,19 @@ struct pers_event_desc { static DEFINE_PER_CPU(struct list_head, pers_events); +static struct pers_event_desc +*get_persistent_event(int cpu, struct perf_event_attr *attr) +{ + struct pers_event_desc *desc; + + list_for_each_entry(desc, &per_cpu(pers_events, cpu), plist) { + if (desc->event->attr.config == attr->config) + return desc; + } + + return NULL; +} + static struct perf_event * add_persistent_event_on_cpu(unsigned int cpu, struct perf_event_attr *attr, unsigned nr_pages) @@ -58,18 +71,13 @@ out: static void del_persistent_event(int cpu, struct perf_event_attr *attr) { - struct pers_event_desc *desc, *tmp; - struct perf_event *event = NULL; - - list_for_each_entry_safe(desc, tmp, &per_cpu(pers_events, cpu), plist) { - if (desc->event->attr.config == attr->config) { - event = desc->event; - break; - } - } + struct pers_event_desc *desc; + struct perf_event *event; - if (!event) + desc = get_persistent_event(cpu, attr); + if (!desc) return; + event = desc->event; list_del(&desc->plist); @@ -161,11 +169,11 @@ int perf_get_persistent_event_fd(unsigned cpu, struct perf_event_attr *attr) if (cpu >= (unsigned)nr_cpu_ids) return -EINVAL; - list_for_each_entry(desc, &per_cpu(pers_events, cpu), plist) - if (desc->event->attr.config == attr->config) - return __alloc_persistent_event_fd(desc); + desc = get_persistent_event(cpu, attr); + if (!desc) + return -ENODEV; - return -ENODEV; + return __alloc_persistent_event_fd(desc); } -- 1.8.1.1
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