gdbserver: Remove duplicate functions to find any thread of process

We have about 6 functions/callbacks to find_inferior meant to find a
thread that belongs to a given pid.  Remove all but
find_any_thread_of_pid and replace their uses with
find_any_thread_of_pid.

gdb/gdbserver/ChangeLog:

	* server.c (first_thread_of): Remove.
	(process_serial_event): Replace usage of first_thread_of with
	find_any_thread_of_pid.
	* tracepoint.c (same_process_p): Remove.
	(gdb_agent_about_to_close): Replace usage of same_process_p with
	find_any_thread_of_pid.
	* linux-x86-low.c (same_process_callback): Remove.
	(x86_arch_setup_process_callback): Replace usage of
	same_process_callback with find_any_thread_of_pid.
	* thread-db.c (any_thread_of): Remove.
	(switch_to_process): Replace usage of any_thread_of with
	find_any_thread_of_pid.
	* inferiors.c (thread_pid_matches_callback): Remove.
	(find_thread_process): Adjust to use find_any_thread_of_pid.

1 files changed, 3 insertions, 16 deletions

diff --git a/gdb/gdbserver/server.c b/gdb/gdbserver/server.c
index 56c6393..bedb87b 100644
--- a/gdb/gdbserver/server.c
+++ b/gdb/gdbserver/server.c
@@ -3450,17 +3450,6 @@ gdbserver_show_disableable (FILE *stream)
       break;					\
     }
 
-static int
-first_thread_of (struct inferior_list_entry *entry, void *args)
-{
-  int pid = * (int *) args;
-
-  if (ptid_get_pid (entry->id) == pid)
-    return 1;
-
-  return 0;
-}
-
 static void
 kill_inferior_callback (struct inferior_list_entry *entry)
 {
@@ -4162,11 +4151,9 @@ process_serial_event (void)
 		   && ptid_equal (pid_to_ptid (pid),
 				  gdb_id))
 	    {
-	      struct thread_info *thread =
-		(struct thread_info *) find_inferior (&all_threads,
-						      first_thread_of,
-						      &pid);
-	      if (!thread)
+	      thread_info *thread = find_any_thread_of_pid (pid);
+
+	      if (thread == NULL)
 		{
 		  write_enn (own_buf);
 		  break;