[GIT PULL] tracing: Updates for 5.4

[Steven Rostedt]

Linus,

Tracing updates:

 - Addition of multiprobes to kprobe and uprobe events
   Allows for more than one probe attached to the same location

 - Addition of adding immediates to probe parameters

 - Clean up of the recordmcount.c code. This brings us closer
   to merging recordmcount into objtool, and reuse code.

 - Other small clean ups


Please pull the latest trace-v5.4 tree, which can be found at:


  git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git
trace-v5.4

Tag SHA1: c7ec8cea00f554d7f234b4e8f4fdc0b0a89b564f
Head SHA1: b78b94b82122208902c0f83805e614e1239f9893


Andy Shevchenko (1):
      tracing: Be more clever when dumping hex in __print_hex()

Changbin Du (1):
      ftrace: Simplify ftrace hash lookup code in clear_func_from_hash()

Masami Hiramatsu (17):
      kprobes: Allow kprobes coexist with livepatch
      tracing/probe: Split trace_event related data from trace_probe
      tracing/dynevent: Delete all matched events
      tracing/dynevent: Pass extra arguments to match operation
      tracing/kprobe: Add multi-probe per event support
      tracing/uprobe: Add multi-probe per uprobe event support
      tracing/kprobe: Add per-probe delete from event
      tracing/uprobe: Add per-probe delete from event
      tracing/probe: Add immediate parameter support
      tracing/probe: Add immediate string parameter support
      selftests/ftrace: Add a testcase for kprobe multiprobe event
      selftests/ftrace: Add syntax error test for immediates
      selftests/ftrace: Add syntax error test for multiprobe
      tracing/kprobe: Fix NULL pointer access in trace_porbe_unlink()
      tracing/probe: Fix to allow user to enable events on unloaded modules
      tracing/probe: Reject exactly same probe event
      selftests/ftrace: Update kprobe event error testcase

Matt Helsley (8):
      recordmcount: Remove redundant strcmp
      recordmcount: Remove uread()
      recordmcount: Remove unused fd from uwrite() and ulseek()
      recordmcount: Rewrite error/success handling
      recordmcount: Kernel style function signature formatting
      recordmcount: Kernel style formatting
      recordmcount: Remove redundant cleanup() calls
      recordmcount: Clarify what cleanup() does

Steven Rostedt (VMware) (4):
      tracing/arm64: Have max stack tracer handle the case of return address after data
      tracing: Document the stack trace algorithm in the comments
      tracing: Rename tracing_reset() to tracing_reset_cpu()
      selftests/ftrace: Select an existing function in kprobe_eventname test

Tom Zanussi (1):
      tracing: Make sure variable reference alias has correct var_ref_idx

Zhengjun Xing (1):
      tracing: Add "gfp_t" support in synthetic_events

----
 Documentation/trace/kprobetrace.rst                |   1 +
 Documentation/trace/uprobetracer.rst               |   1 +
 arch/arm64/include/asm/ftrace.h                    |  13 +
 kernel/kprobes.c                                   |  56 +++-
 kernel/trace/ftrace.c                              |   6 +-
 kernel/trace/trace.c                               |  14 +-
 kernel/trace/trace.h                               |   1 -
 kernel/trace/trace_dynevent.c                      |  10 +-
 kernel/trace/trace_dynevent.h                      |   7 +-
 kernel/trace/trace_events_hist.c                   |  25 +-
 kernel/trace/trace_kprobe.c                        | 268 +++++++++++++----
 kernel/trace/trace_output.c                        |   6 +-
 kernel/trace/trace_probe.c                         | 178 ++++++++++--
 kernel/trace/trace_probe.h                         |  68 ++++-
 kernel/trace/trace_stack.c                         | 112 +++++++
 kernel/trace/trace_uprobe.c                        | 299 +++++++++++++++----
 scripts/recordmcount.c                             | 321 ++++++++++-----------
 scripts/recordmcount.h                             | 150 +++++++---
 tools/testing/selftests/ftrace/test.d/functions    |   2 +-
 .../ftrace/test.d/kprobe/kprobe_eventname.tc       |  16 +-
 .../ftrace/test.d/kprobe/kprobe_multiprobe.tc      |  35 +++
 .../ftrace/test.d/kprobe/kprobe_syntax_errors.tc   |  16 +
 22 files changed, 1199 insertions(+), 406 deletions(-)
 create mode 100644 tools/testing/selftests/ftrace/test.d/kprobe/kprobe_multiprobe.tc
---------------------------