linux-kernel - Re: [PATCH v13 06/11] arm64: Use stack_trace_consume

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Message-ID: <YgutJKqYe8ss8LLd@FVFF77S0Q05N>
Date:   Tue, 15 Feb 2022 13:39:48 +0000
From:   Mark Rutland <mark.rutland@....com>
To:     madvenka@...ux.microsoft.com
Cc:     broonie@...nel.org, jpoimboe@...hat.com, ardb@...nel.org,
        nobuta.keiya@...itsu.com, sjitindarsingh@...il.com,
        catalin.marinas@....com, will@...nel.org, jmorris@...ei.org,
        linux-arm-kernel@...ts.infradead.org,
        live-patching@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v13 06/11] arm64: Use stack_trace_consume_fn and rename
 args to unwind()

On Mon, Jan 17, 2022 at 08:56:03AM -0600, madvenka@...ux.microsoft.com wrote:
> From: "Madhavan T. Venkataraman" <madvenka@...ux.microsoft.com>
> 
> Rename the arguments to unwind() for better consistency. Also, use the
> typedef stack_trace_consume_fn for the consume_entry function as it is
> already defined in linux/stacktrace.h.
>
> Signed-off-by: Madhavan T. Venkataraman <madvenka@...ux.microsoft.com>

How about: 

| arm64: align with common stracktrace naming
|
| For historical reasons, the naming of parameters and their types in the arm64
| stacktrace code differs from that used in generic code and other
| architectures, even though the types are equivalent.
|
| For consistency and clarity, use the generic names.

Either way:

Reviewed-by: Mark Rutland <mark.rutland@....com>

Mark.

> ---
>  arch/arm64/kernel/stacktrace.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm64/kernel/stacktrace.c b/arch/arm64/kernel/stacktrace.c
> index 1b32e55735aa..f772dac78b11 100644
> --- a/arch/arm64/kernel/stacktrace.c
> +++ b/arch/arm64/kernel/stacktrace.c
> @@ -181,12 +181,12 @@ static int notrace unwind_next(struct unwind_state *state)
>  NOKPROBE_SYMBOL(unwind_next);
>  
>  static void notrace unwind(struct unwind_state *state,
> -			   bool (*fn)(void *, unsigned long), void *data)
> +			   stack_trace_consume_fn consume_entry, void *cookie)
>  {
>  	while (1) {
>  		int ret;
>  
> -		if (!fn(data, state->pc))
> +		if (!consume_entry(cookie, state->pc))
>  			break;
>  		ret = unwind_next(state);
>  		if (ret < 0)
> -- 
> 2.25.1
>