tracing fixes for v6.19:

- Add Documentation/core-api/tracepoint.rst to TRACING in MAINTAINERS file
 
   Updates to the tracepoint.rst document should be reviewed by the
   tracing maintainers.
 
 - Fix warning triggered by perf attaching to synthetic events
 
   The synthetic events do not add a function to be registered when
   perf attaches to them. This causes a warning when perf registers
   a synthetic event and passes a NULL pointer to the tracepoint register
   function. Ideally synthetic events should be updated to work with
   perf, but as that's a feature and not a bug fix, simply now return
   -ENODEV when perf tries to register an event that has a NULL pointer
   for its function. This no longer causes a kernel warning and simply
   causes the perf code to fail with an error message.
 
 - Fix 32bit overflow in option flag test
 
   The option's flags changed from 32 bits in size to 64 bits in size.
   Fix one of the places that shift 1 by the option bit number to
   to be 1ULL.
 
 - Fix the output of printing the direct jmp functions
 
   The enabled_functions that shows how functions are being attached by
   ftrace wasn't updated to accommodate the new direct jmp trampolines
   that set the LSB of the pointer, and outputs garbage. Update the
   output to handle the direct jmp trampolines.
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Merge tag 'trace-v6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

Pull tracing fixes from Steven Rostedt:

 - Add Documentation/core-api/tracepoint.rst to TRACING in MAINTAINERS
   file

   Updates to the tracepoint.rst document should be reviewed by the
   tracing maintainers.

 - Fix warning triggered by perf attaching to synthetic events

   The synthetic events do not add a function to be registered when perf
   attaches to them. This causes a warning when perf registers a
   synthetic event and passes a NULL pointer to the tracepoint register
   function.

   Ideally synthetic events should be updated to work with perf, but as
   that's a feature and not a bug fix, simply now return -ENODEV when
   perf tries to register an event that has a NULL pointer for its
   function. This no longer causes a kernel warning and simply causes
   the perf code to fail with an error message.

 - Fix 32bit overflow in option flag test

   The option's flags changed from 32 bits in size to 64 bits in size.
   Fix one of the places that shift 1 by the option bit number to to be
   1ULL.

 - Fix the output of printing the direct jmp functions

   The enabled_functions that shows how functions are being attached by
   ftrace wasn't updated to accommodate the new direct jmp trampolines
   that set the LSB of the pointer, and outputs garbage. Update the
   output to handle the direct jmp trampolines.

* tag 'trace-v6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  ftrace: Fix address for jmp mode in t_show()
  tracing: Fix UBSAN warning in __remove_instance()
  tracing: Do not register unsupported perf events
  MAINTAINERS: add tracepoint core-api doc files to TRACING

MAINTAINERS

@@ -26463,6 +26463,7 @@ L:	linux-trace-kernel@vger.kernel.org
 S:	Maintained
 Q:	https://patchwork.kernel.org/project/linux-trace-kernel/list/
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace.git
+F:	Documentation/core-api/tracepoint.rst
 F:	Documentation/trace/*
 F:	fs/tracefs/
 F:	include/linux/trace*.h

kernel/trace/ftrace.c

@@ -4518,8 +4518,11 @@ static int t_show(struct seq_file *m, void *v)
 			unsigned long direct;
 
 			direct = ftrace_find_rec_direct(rec->ip);
-			if (direct)
-				seq_printf(m, "\n\tdirect-->%pS", (void *)direct);
+			if (direct) {
+				seq_printf(m, "\n\tdirect%s-->%pS",
+					   ftrace_is_jmp(direct) ? "(jmp)" : "",
+					   (void *)ftrace_jmp_get(direct));
+			}
 		}
 	}
 

kernel/trace/trace.c

@@ -10507,7 +10507,7 @@ static int __remove_instance(struct trace_array *tr)
 
 	/* Disable all the flags that were enabled coming in */
 	for (i = 0; i < TRACE_FLAGS_MAX_SIZE; i++) {
-		if ((1 << i) & ZEROED_TRACE_FLAGS)
+		if ((1ULL << i) & ZEROED_TRACE_FLAGS)
 			set_tracer_flag(tr, 1ULL << i, 0);
 	}
 

kernel/trace/trace_events.c

@@ -700,6 +700,8 @@ int trace_event_reg(struct trace_event_call *call,
 
 #ifdef CONFIG_PERF_EVENTS
 	case TRACE_REG_PERF_REGISTER:
+		if (!call->class->perf_probe)
+			return -ENODEV;
 		return tracepoint_probe_register(call->tp,
 						 call->class->perf_probe,
 						 call);