From: Jiri Olsa <jolsa@redhat.com>
To: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>,
netdev@vger.kernel.org, bpf@vger.kernel.org,
lkml <linux-kernel@vger.kernel.org>,
Martin KaFai Lau <kafai@fb.com>, Song Liu <songliubraving@fb.com>,
Yonghong Song <yhs@fb.com>,
John Fastabend <john.fastabend@gmail.com>,
KP Singh <kpsingh@chromium.org>,
"Naveen N . Rao" <naveen.n.rao@linux.ibm.com>,
Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>,
"David S . Miller" <davem@davemloft.net>
Subject: Re: [PATCH v5 1/9] ftrace: Add ftrace_set_filter_ips function
Date: Fri, 28 Jan 2022 10:37:56 +0100 [thread overview]
Message-ID: <YfO5dLsrdRlN7D62@krava> (raw)
In-Reply-To: <20220128110523.de0e36317a34d48b793a7f6b@kernel.org>
On Fri, Jan 28, 2022 at 11:05:23AM +0900, Masami Hiramatsu wrote:
SNIP
>
> So, I wrote a below change for the next version. Is that OK for you?
>
> Thank you,
>
> diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
> index f305e18f699f..a28b1bdb234a 100644
> --- a/kernel/trace/ftrace.c
> +++ b/kernel/trace/ftrace.c
> @@ -4985,8 +4985,13 @@ ftrace_match_addr(struct ftrace_hash *hash, unsigned long *ips,
>
> for (i = 0; i < cnt; i++) {
> err = __ftrace_match_addr(hash, ips[i], remove);
> - if (err)
> + if (err) {
> + /*
> + * This expects the @hash is a temporary hash and if this
> + * fails the caller must free the @hash.
> + */
> return err;
> + }
> }
> return 0;
> }
> @@ -5649,7 +5654,7 @@ int ftrace_set_filter_ip(struct ftrace_ops *ops, unsigned long ip,
> EXPORT_SYMBOL_GPL(ftrace_set_filter_ip);
>
> /**
> - * ftrace_set_filter_ips - set a functions to filter on in ftrace by addresses
> + * ftrace_set_filter_ips - set functions to filter on in ftrace by addresses
> * @ops - the ops to set the filter with
> * @ips - the array of addresses to add to or remove from the filter.
> * @cnt - the number of addresses in @ips
looks good, thanks
jirka
next prev parent reply other threads:[~2022-01-28 9:38 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-25 12:11 [PATCH v5 0/9] fprobe: Introduce fprobe function entry/exit probe Masami Hiramatsu
2022-01-25 12:11 ` [PATCH v5 1/9] ftrace: Add ftrace_set_filter_ips function Masami Hiramatsu
2022-01-25 16:06 ` Steven Rostedt
2022-01-25 16:46 ` Jiri Olsa
2022-01-28 2:05 ` Masami Hiramatsu
2022-01-28 9:37 ` Jiri Olsa [this message]
2022-01-25 12:11 ` [PATCH v5 2/9] fprobe: Add ftrace based probe APIs Masami Hiramatsu
2022-01-25 16:21 ` Steven Rostedt
2022-01-26 9:06 ` Masami Hiramatsu
2022-01-25 16:41 ` Jiri Olsa
2022-01-25 18:11 ` Jiri Olsa
2022-01-26 2:50 ` Masami Hiramatsu
2022-01-26 15:59 ` Masami Hiramatsu
2022-01-26 18:39 ` Jiri Olsa
2022-01-25 12:12 ` [PATCH v5 3/9] rethook: Add a generic return hook Masami Hiramatsu
2022-01-25 16:46 ` Steven Rostedt
2022-01-26 0:10 ` Masami Hiramatsu
2022-01-26 5:29 ` Masami Hiramatsu
2022-01-25 12:12 ` [PATCH v5 4/9] rethook: x86: Add rethook x86 implementation Masami Hiramatsu
2022-01-25 12:12 ` [PATCH v5 5/9] ARM: rethook: Add rethook arm implementation Masami Hiramatsu
2022-01-25 12:12 ` [PATCH v5 6/9] arm64: rethook: Add arm64 rethook implementation Masami Hiramatsu
2022-01-25 12:12 ` [PATCH v5 7/9] fprobe: Add exit_handler support Masami Hiramatsu
2022-01-25 17:08 ` Steven Rostedt
2022-01-25 12:13 ` [PATCH v5 8/9] fprobe: Add sample program for fprobe Masami Hiramatsu
2022-01-25 12:13 ` [PATCH v5 9/9] docs: fprobe: Add fprobe description to ftrace-use.rst Masami Hiramatsu
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