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

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Message-ID: <a6c605a7-71fa-077e-0bca-33c76fc13ad3@linux.microsoft.com>
Date:   Tue, 15 Feb 2022 12:12:51 -0600
From:   "Madhavan T. Venkataraman" <madvenka@...ux.microsoft.com>
To:     Mark Rutland <mark.rutland@....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 2/15/22 07:39, Mark Rutland wrote:
> 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.
> 

Will add this.

Madhavan

> 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
>>