[0/3] ftrace: add sample code with dynamic ftrace_ops

Message ID	20221103170907.931465-1-mark.rutland@arm.com
Headers	Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; From: Mark Rutland <mark.rutland@arm.com> To: linux-kernel@vger.kernel.org Cc: mark.rutland@arm.com, mhiramat@kernel.org, revest@chromium.org, rostedt@goodmis.org Subject: [PATCH 0/3] ftrace: add sample code with dynamic ftrace_ops Date: Thu, 3 Nov 2022 17:09:04 +0000 Message-Id: <20221103170907.931465-1-mark.rutland@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk
Series	ftrace: add sample code with dynamic ftrace_ops \| [0/3] ftrace: add sample code with dynamic ftrace_ops [1/3] ftrace: maintain samples/ftrace [2/3] ftrace: export ftrace_free_filter() to modules [3/3] ftrace: add sample with custom ops

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20221103170907.931465-1-mark.rutland@arm.com

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From: Mark Rutland <mark.rutland@arm.com>
To: linux-kernel@vger.kernel.org
Cc: mark.rutland@arm.com, mhiramat@kernel.org, revest@chromium.org,
        rostedt@goodmis.org
Subject: [PATCH 0/3] ftrace: add sample code with dynamic ftrace_ops
Date: Thu,  3 Nov 2022 17:09:04 +0000
Message-Id: <20221103170907.931465-1-mark.rutland@arm.com>
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Series

ftrace: add sample code with dynamic ftrace_ops |

Message

Mark Rutland Nov. 3, 2022, 5:09 p.m. UTC

  This series adds sample code to manipulate dynamic ftrace_ops, which
I've been using to benchmark/test some changes I've been making in this
area for arm64.

In the process of writing that I spotted a couple of minor issues,
addressed by the first two patches.

I'm not sure whether this should be a sample or something under lib/;
I'm happy to change that if folk have strong opinions.

Thanks;
Mark.

Mark Rutland (3):
  ftrace: maintain samples/ftrace
  ftrace: export ftrace_free_filter() to modules
  ftrace: add sample with custom ops

 MAINTAINERS                                 |   1 +
 kernel/trace/ftrace.c                       |  23 +-
 samples/Kconfig                             |   7 +
 samples/Makefile                            |   1 +
 samples/ftrace/Makefile                     |   1 +
 samples/ftrace/ftrace-direct-multi-modify.c |   1 +
 samples/ftrace/ftrace-direct-multi.c        |   1 +
 samples/ftrace/ftrace-ops.c                 | 252 ++++++++++++++++++++
 8 files changed, 286 insertions(+), 1 deletion(-)
 create mode 100644 samples/ftrace/ftrace-ops.c