v4.19.13 snapshot.
diff --git a/tools/perf/util/thread.h b/tools/perf/util/thread.h
new file mode 100644
index 0000000..07606aa
--- /dev/null
+++ b/tools/perf/util/thread.h
@@ -0,0 +1,134 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __PERF_THREAD_H
+#define __PERF_THREAD_H
+
+#include <linux/refcount.h>
+#include <linux/rbtree.h>
+#include <linux/list.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include "symbol.h"
+#include <strlist.h>
+#include <intlist.h>
+#include "rwsem.h"
+
+struct thread_stack;
+struct unwind_libunwind_ops;
+
+struct thread {
+ union {
+ struct rb_node rb_node;
+ struct list_head node;
+ };
+ struct map_groups *mg;
+ pid_t pid_; /* Not all tools update this */
+ pid_t tid;
+ pid_t ppid;
+ int cpu;
+ refcount_t refcnt;
+ bool comm_set;
+ int comm_len;
+ bool dead; /* if set thread has exited */
+ struct list_head namespaces_list;
+ struct rw_semaphore namespaces_lock;
+ struct list_head comm_list;
+ struct rw_semaphore comm_lock;
+ u64 db_id;
+
+ void *priv;
+ struct thread_stack *ts;
+ struct nsinfo *nsinfo;
+#ifdef HAVE_LIBUNWIND_SUPPORT
+ void *addr_space;
+ struct unwind_libunwind_ops *unwind_libunwind_ops;
+#endif
+};
+
+struct machine;
+struct namespaces;
+struct comm;
+
+struct thread *thread__new(pid_t pid, pid_t tid);
+int thread__init_map_groups(struct thread *thread, struct machine *machine);
+void thread__delete(struct thread *thread);
+
+struct thread *thread__get(struct thread *thread);
+void thread__put(struct thread *thread);
+
+static inline void __thread__zput(struct thread **thread)
+{
+ thread__put(*thread);
+ *thread = NULL;
+}
+
+#define thread__zput(thread) __thread__zput(&thread)
+
+static inline void thread__exited(struct thread *thread)
+{
+ thread->dead = true;
+}
+
+struct namespaces *thread__namespaces(const struct thread *thread);
+int thread__set_namespaces(struct thread *thread, u64 timestamp,
+ struct namespaces_event *event);
+
+int __thread__set_comm(struct thread *thread, const char *comm, u64 timestamp,
+ bool exec);
+static inline int thread__set_comm(struct thread *thread, const char *comm,
+ u64 timestamp)
+{
+ return __thread__set_comm(thread, comm, timestamp, false);
+}
+
+int thread__set_comm_from_proc(struct thread *thread);
+
+int thread__comm_len(struct thread *thread);
+struct comm *thread__comm(const struct thread *thread);
+struct comm *thread__exec_comm(const struct thread *thread);
+const char *thread__comm_str(const struct thread *thread);
+int thread__insert_map(struct thread *thread, struct map *map);
+int thread__fork(struct thread *thread, struct thread *parent, u64 timestamp);
+size_t thread__fprintf(struct thread *thread, FILE *fp);
+
+struct thread *thread__main_thread(struct machine *machine, struct thread *thread);
+
+struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr,
+ struct addr_location *al);
+
+struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode,
+ u64 addr, struct addr_location *al);
+
+void thread__find_cpumode_addr_location(struct thread *thread, u64 addr,
+ struct addr_location *al);
+
+static inline void *thread__priv(struct thread *thread)
+{
+ return thread->priv;
+}
+
+static inline void thread__set_priv(struct thread *thread, void *p)
+{
+ thread->priv = p;
+}
+
+static inline bool thread__is_filtered(struct thread *thread)
+{
+ if (symbol_conf.comm_list &&
+ !strlist__has_entry(symbol_conf.comm_list, thread__comm_str(thread))) {
+ return true;
+ }
+
+ if (symbol_conf.pid_list &&
+ !intlist__has_entry(symbol_conf.pid_list, thread->pid_)) {
+ return true;
+ }
+
+ if (symbol_conf.tid_list &&
+ !intlist__has_entry(symbol_conf.tid_list, thread->tid)) {
+ return true;
+ }
+
+ return false;
+}
+
+#endif /* __PERF_THREAD_H */