linux-kernel - Re: [PATCH 6/6] rv: Remove struct rv

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Message-ID: <1d12e86b32c8c5977e5925079f6b74675a3a9e91.camel@redhat.com>
Date: Mon, 21 Jul 2025 16:38:37 +0200
From: Gabriele Monaco <gmonaco@...hat.com>
To: Nam Cao <namcao@...utronix.de>
Cc: Steven Rostedt <rostedt@...dmis.org>, Masami Hiramatsu
 <mhiramat@...nel.org>,  Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
 linux-trace-kernel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 6/6] rv: Remove struct rv_monitor::reacting

On Mon, 2025-07-21 at 11:47 +0200, Nam Cao wrote:
> The field 'reacting' in struct rv_monitor is set but never used.
> Delete it.
> 
> Signed-off-by: Nam Cao <namcao@...utronix.de>
> ---

Yeah seems to be the case, thanks for spotting it.

Reviewed-by: Gabriele Monaco <gmonaco@...hat.com>

>  include/linux/rv.h            |  1 -
>  kernel/trace/rv/rv_reactors.c | 14 ++++++--------
>  2 files changed, 6 insertions(+), 9 deletions(-)
> 
> diff --git a/include/linux/rv.h b/include/linux/rv.h
> index 2f867d6f72ba..80731242fe60 100644
> --- a/include/linux/rv.h
> +++ b/include/linux/rv.h
> @@ -104,7 +104,6 @@ struct rv_monitor {
>  #ifdef CONFIG_RV_REACTORS
>  	struct rv_reactor	*reactor;
>  	__printf(1, 2) void	(*react)(const char *msg, ...);
> -	bool			reacting;
>  #endif
>  	struct list_head	list;
>  	struct rv_monitor	*parent;
> diff --git a/kernel/trace/rv/rv_reactors.c
> b/kernel/trace/rv/rv_reactors.c
> index aee622e4b833..6b03f3f6ecc1 100644
> --- a/kernel/trace/rv/rv_reactors.c
> +++ b/kernel/trace/rv/rv_reactors.c
> @@ -149,7 +149,7 @@ static const struct seq_operations
> monitor_reactors_seq_ops = {
>  
>  static void monitor_swap_reactors_single(struct rv_monitor *mon,
>  					 struct rv_reactor *reactor,
> -					 bool reacting, bool nested)
> +					 bool nested)
>  {
>  	bool monitor_enabled;
>  
> @@ -162,7 +162,6 @@ static void monitor_swap_reactors_single(struct
> rv_monitor *mon,
>  		rv_disable_monitor(mon);
>  
>  	mon->reactor = reactor;
> -	mon->reacting = reacting;
>  	mon->react = reactor ? reactor->react : NULL;
>  
>  	/* enable only once if iterating through a container */
> @@ -170,8 +169,7 @@ static void monitor_swap_reactors_single(struct
> rv_monitor *mon,
>  		rv_enable_monitor(mon);
>  }
>  
> -static void monitor_swap_reactors(struct rv_monitor *mon,
> -				  struct rv_reactor *reactor, bool
> reacting)
> +static void monitor_swap_reactors(struct rv_monitor *mon, struct
> rv_reactor *reactor)
>  {
>  	struct rv_monitor *p = mon;
>  
> @@ -179,7 +177,7 @@ static void monitor_swap_reactors(struct
> rv_monitor *mon,
>  		list_for_each_entry_continue(p, &rv_monitors_list,
> list) {
>  			if (p->parent != mon)
>  				break;
> -			monitor_swap_reactors_single(p, reactor,
> reacting, true);
> +			monitor_swap_reactors_single(p, reactor,
> true);
>  		}
>  	/*
>  	 * This call enables and disables the monitor if they were
> active.
> @@ -187,7 +185,7 @@ static void monitor_swap_reactors(struct
> rv_monitor *mon,
>  	 * All nested monitors are enabled also if they were off, we
> may refine
>  	 * this logic in the future.
>  	 */
> -	monitor_swap_reactors_single(mon, reactor, reacting, false);
> +	monitor_swap_reactors_single(mon, reactor, false);
>  }
>  
>  static ssize_t
> @@ -221,7 +219,7 @@ monitor_reactors_write(struct file *file, const
> char __user *user_buf,
>  
>  	len = strlen(ptr);
>  	if (!len) {
> -		monitor_swap_reactors(mon, NULL, false);
> +		monitor_swap_reactors(mon, NULL);
>  		return count;
>  	}
>  
> @@ -233,7 +231,7 @@ monitor_reactors_write(struct file *file, const
> char __user *user_buf,
>  		if (strcmp(ptr, reactor->name) != 0)
>  			continue;
>  
> -		monitor_swap_reactors(mon, reactor, true);
> +		monitor_swap_reactors(mon, reactor);
>  
>  		retval = count;
>  		break;