Fix: timer_expire_entry changed in 4.19.312

[lttng-modules.git] / lttng-context-perf-counters.c

diff --git a/lttng-context-perf-counters.c b/lttng-context-perf-counters.c
deleted file mode 100644 (file)
index 20d49d5..0000000
--- a/lttng-context-perf-counters.c
+++ /dev/null
@@ -1,162 +0,0 @@
-/*
- * (C) Copyright       2009-2011 -
- *             Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * LTTng performance monitoring counters (perf-counters) integration module.
- *
- * Dual LGPL v2.1/GPL v2 license.
- */
-
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/perf_event.h>
-#include <linux/list.h>
-#include <linux/string.h>
-#include "ltt-events.h"
-#include "wrapper/ringbuffer/frontend_types.h"
-#include "wrapper/vmalloc.h"
-#include "ltt-tracer.h"
-
-/*
- * TODO: Add CPU hotplug support.
- */
-
-static DEFINE_MUTEX(perf_counter_mutex);
-static LIST_HEAD(perf_counter_contexts);
-
-static
-size_t perf_counter_get_size(size_t offset)
-{
-       size_t size = 0;
-
-       size += lib_ring_buffer_align(offset, ltt_alignof(uint64_t));
-       size += sizeof(uint64_t);
-       return size;
-}
-
-static
-void perf_counter_record(struct lttng_ctx_field *field,
-                        struct lib_ring_buffer_ctx *ctx,
-                        struct ltt_channel *chan)
-{
-       struct perf_event *event;
-       uint64_t value;
-
-       event = field->u.perf_counter.e[ctx->cpu];
-       event->pmu->read(event);
-       value = local64_read(&event->count);
-       lib_ring_buffer_align_ctx(ctx, ltt_alignof(value));
-       chan->ops->event_write(ctx, &value, sizeof(value));
-}
-
-static
-void overflow_callback(struct perf_event *event, int nmi,
-                      struct perf_sample_data *data,
-                      struct pt_regs *regs)
-{
-}
-
-static
-void lttng_destroy_perf_counter_field(struct lttng_ctx_field *field)
-{
-       struct perf_event **events = field->u.perf_counter.e;
-       int cpu;
-
-       mutex_lock(&perf_counter_mutex);
-       list_del(&field->u.perf_counter.head);
-       for_each_online_cpu(cpu)
-               perf_event_release_kernel(events[cpu]);
-       mutex_unlock(&perf_counter_mutex);
-       kfree(field->event_field.name);
-       kfree(field->u.perf_counter.attr);
-       kfree(events);
-}
-
-int lttng_add_perf_counter_to_ctx(uint32_t type,
-                                 uint64_t config,
-                                 const char *name,
-                                 struct lttng_ctx **ctx)
-{
-       struct lttng_ctx_field *field;
-       struct perf_event **events;
-       struct perf_event_attr *attr;
-       int ret;
-       int cpu;
-       char *name_alloc;
-
-       events = kzalloc(num_possible_cpus() * sizeof(*events), GFP_KERNEL);
-       if (!events)
-               return -ENOMEM;
-
-       attr = kzalloc(sizeof(*field->u.perf_counter.attr), GFP_KERNEL);
-       if (!attr) {
-               ret = -ENOMEM;
-               goto error_attr;
-       }
-
-       attr->type = type;
-       attr->config = config;
-       attr->size = sizeof(struct perf_event_attr);
-       attr->pinned = 1;
-       attr->disabled = 0;
-
-       mutex_lock(&perf_counter_mutex);
-
-       for_each_online_cpu(cpu) {
-               events[cpu] = perf_event_create_kernel_counter(attr,
-                                       cpu, NULL, overflow_callback);
-               if (!events[cpu]) {
-                       ret = -EINVAL;
-                       goto name_alloc_error;
-               }
-       }
-
-       name_alloc = kstrdup(name, GFP_KERNEL);
-       if (!name_alloc) {
-               ret = -ENOMEM;
-               goto name_alloc_error;
-       }
-
-       field = lttng_append_context(ctx);
-       if (!field) {
-               ret = -ENOMEM;
-               goto error;
-       }
-       field->destroy = lttng_destroy_perf_counter_field;
-
-       field->event_field.name = name_alloc;
-       field->event_field.type.atype = atype_integer;
-       field->event_field.type.u.basic.integer.size = sizeof(unsigned long) * CHAR_BIT;
-       field->event_field.type.u.basic.integer.alignment = ltt_alignof(unsigned long) * CHAR_BIT;
-       field->event_field.type.u.basic.integer.signedness = is_signed_type(unsigned long);
-       field->event_field.type.u.basic.integer.reverse_byte_order = 0;
-       field->event_field.type.u.basic.integer.base = 10;
-       field->event_field.type.u.basic.integer.encoding = lttng_encode_none;
-       field->get_size = perf_counter_get_size;
-       field->record = perf_counter_record;
-       field->u.perf_counter.e = events;
-       field->u.perf_counter.attr = attr;
-
-       list_add(&field->u.perf_counter.head, &perf_counter_contexts);
-       mutex_unlock(&perf_counter_mutex);
-
-       wrapper_vmalloc_sync_all();
-       return 0;
-
-error:
-       kfree(name_alloc);
-name_alloc_error:
-       for_each_online_cpu(cpu) {
-               if (events[cpu])
-                       perf_event_release_kernel(events[cpu]);
-       }
-       mutex_unlock(&perf_counter_mutex);
-       kfree(attr);
-error_attr:
-       kfree(events);
-       return ret;
-}
-
-MODULE_LICENSE("GPL and additional rights");
-MODULE_AUTHOR("Mathieu Desnoyers");
-MODULE_DESCRIPTION("Linux Trace Toolkit Perf Support");