linux-kernel - Re: [PATCH 3/5] ftrace: Remove "filter_hash" parameter from ftrace_hash_rec

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20240606065018.0bf1d82a3bf9c526aee9a170@kernel.org>
Date: Thu, 6 Jun 2024 06:50:18 +0900
From: Masami Hiramatsu (Google) <mhiramat@...nel.org>
To: Steven Rostedt <rostedt@...dmis.org>
Cc: linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org, Masami
 Hiramatsu <mhiramat@...nel.org>, Mark Rutland <mark.rutland@....com>,
 Mathieu Desnoyers <mathieu.desnoyers@...icios.com>, Andrew Morton
 <akpm@...ux-foundation.org>
Subject: Re: [PATCH 3/5] ftrace: Remove "filter_hash" parameter from
 ftrace_hash_rec_disable/enable()

On Tue, 04 Jun 2024 17:28:20 -0400
Steven Rostedt <rostedt@...dmis.org> wrote:

> From: "Steven Rostedt (Google)" <rostedt@...dmis.org>
> 
> The functions ftrace_hash_rec_disable() and ftrace_hash_rec_enable()
> always has 1 passed to its "ftrace_hash" parameter. Remove the parameter
> and pass in true to __ftrace_hash_rec_update().
> 
> Also add some comments to both those functions explaining what they do.
> 

Looks good to me.

Reviewed-by: Masami Hiramatsu (Google) <mhiramat@...nel.org>

Thank you,

> Signed-off-by: Steven Rostedt (Google) <rostedt@...dmis.org>
> ---
>  kernel/trace/ftrace.c | 24 ++++++++++++++++--------
>  1 file changed, 16 insertions(+), 8 deletions(-)
> 
> diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
> index 93c7c5fd4249..de652201c86c 100644
> --- a/kernel/trace/ftrace.c
> +++ b/kernel/trace/ftrace.c
> @@ -1895,16 +1895,24 @@ static bool __ftrace_hash_rec_update(struct ftrace_ops *ops,
>  	return update;
>  }
>  
> -static bool ftrace_hash_rec_disable(struct ftrace_ops *ops,
> -				    int filter_hash)
> +/*
> + * This is called when an ops is removed from tracing. It will decrement
> + * the counters of the dyn_ftrace records for all the functions that
> + * the @ops attached to.
> + */
> +static bool ftrace_hash_rec_disable(struct ftrace_ops *ops)
>  {
> -	return __ftrace_hash_rec_update(ops, filter_hash, 0);
> +	return __ftrace_hash_rec_update(ops, true, 0);
>  }
>  
> -static bool ftrace_hash_rec_enable(struct ftrace_ops *ops,
> -				   int filter_hash)
> +/*
> + * This is called when an ops is added to tracing. It will increment
> + * the counters of the dyn_ftrace records for all the functions that
> + * the @ops attached to.
> + */
> +static bool ftrace_hash_rec_enable(struct ftrace_ops *ops)
>  {
> -	return __ftrace_hash_rec_update(ops, filter_hash, 1);
> +	return __ftrace_hash_rec_update(ops, true, 1);
>  }
>  
>  static void ftrace_hash_rec_update_modify(struct ftrace_ops *ops,
> @@ -3062,7 +3070,7 @@ int ftrace_startup(struct ftrace_ops *ops, int command)
>  		return ret;
>  	}
>  
> -	if (ftrace_hash_rec_enable(ops, 1))
> +	if (ftrace_hash_rec_enable(ops))
>  		command |= FTRACE_UPDATE_CALLS;
>  
>  	ftrace_startup_enable(command);
> @@ -3104,7 +3112,7 @@ int ftrace_shutdown(struct ftrace_ops *ops, int command)
>  	/* Disabling ipmodify never fails */
>  	ftrace_hash_ipmodify_disable(ops);
>  
> -	if (ftrace_hash_rec_disable(ops, 1))
> +	if (ftrace_hash_rec_disable(ops))
>  		command |= FTRACE_UPDATE_CALLS;
>  
>  	ops->flags &= ~FTRACE_OPS_FL_ENABLED;
> -- 
> 2.43.0
> 
> 


-- 
Masami Hiramatsu (Google) <mhiramat@...nel.org>