linux-kernel - Re: [Kgdb-bugreport] [RFC PATCH 1/2] debug_core: move all watch dog syncs to a single function

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Message-ID: <20180620095558.el5m5pvexz3dqdl4@holly.lan>
Date:   Wed, 20 Jun 2018 10:55:58 +0100
From:   Daniel Thompson <daniel.thompson@...aro.org>
To:     Jason Wessel <jason.wessel@...driver.com>
Cc:     paulmck@...ux.vnet.ibm.com, kgdb-bugreport@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org
Subject: Re: [Kgdb-bugreport] [RFC PATCH 1/2] debug_core: move all watch dog
 syncs to a single function

On Mon, Aug 09, 2010 at 12:12:11AM -0500, Jason Wessel wrote:
> Move the various clock and watch dog syncs to a single function in
> advance of adding another sync for the rcu stall detector.
> 
> Signed-off-by: Jason Wessel <jason.wessel@...driver.com>

Small but sensible tidy up IMHO (whether or not patch 2 is altered).

Reviewed-by: Daniel Thompson <daniel.thompson@...aro.org>


> ---
>  kernel/debug/debug_core.c |   15 +++++++++------
>  1 files changed, 9 insertions(+), 6 deletions(-)
> 
> diff --git a/kernel/debug/debug_core.c b/kernel/debug/debug_core.c
> index 3c2d497..e4d6819 100644
> --- a/kernel/debug/debug_core.c
> +++ b/kernel/debug/debug_core.c
> @@ -470,6 +470,12 @@ static void dbg_cpu_switch(int cpu, int next_cpu)
>  	kgdb_info[next_cpu].exception_state |= DCPU_NEXT_MASTER;
>  }
>  
> +static void dbg_touch_watchdogs(void)
> +{
> +	touch_softlockup_watchdog_sync();
> +	clocksource_touch_watchdog();
> +}
> +
>  static int kgdb_cpu_enter(struct kgdb_state *ks, struct pt_regs *regs)
>  {
>  	unsigned long flags;
> @@ -523,8 +529,7 @@ return_normal:
>  			if (trace_on)
>  				tracing_on();
>  			atomic_dec(&cpu_in_kgdb[cpu]);
> -			touch_softlockup_watchdog_sync();
> -			clocksource_touch_watchdog();
> +			dbg_touch_watchdogs();
>  			local_irq_restore(flags);
>  			return 0;
>  		}
> @@ -541,8 +546,7 @@ return_normal:
>  	    (kgdb_info[cpu].task &&
>  	     kgdb_info[cpu].task->pid != kgdb_sstep_pid) && --sstep_tries) {
>  		atomic_set(&kgdb_active, -1);
> -		touch_softlockup_watchdog_sync();
> -		clocksource_touch_watchdog();
> +		dbg_touch_watchdogs();
>  		local_irq_restore(flags);
>  
>  		goto acquirelock;
> @@ -659,8 +663,7 @@ kgdb_restore:
>  		tracing_on();
>  	/* Free kgdb_active */
>  	atomic_set(&kgdb_active, -1);
> -	touch_softlockup_watchdog_sync();
> -	clocksource_touch_watchdog();
> +	dbg_touch_watchdogs();
>  	local_irq_restore(flags);
>  
>  	return kgdb_info[cpu].ret_state;
> -- 
> 1.6.3.3
> 
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