linux-kernel - Re: [patch 2/2] perf jit: remove some no-op error handling

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Date:	Sat, 16 Jul 2016 09:25:32 -0700
From:	Stephane Eranian <eranian@...gle.com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	Dan Carpenter <dan.carpenter@...cle.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org
Subject: Re: [patch 2/2] perf jit: remove some no-op error handling

On Fri, Jul 15, 2016 at 3:27 PM, Arnaldo Carvalho de Melo
<acme@...nel.org> wrote:
> Em Sat, Jul 16, 2016 at 12:08:36AM +0300, Dan Carpenter escreveu:
>> info.e_machine is a uint16_t so m is never less than zero.  It looks
>> like this was maybe left over code from earlier versions so I've just
>> removed it.
>
> Yeah, it sure looks like that, applying, thanks,
>
Thanks for cleaning this up.

> - Arnaldo
>
>> Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
>>
>> diff --git a/tools/perf/jvmti/jvmti_agent.c b/tools/perf/jvmti/jvmti_agent.c
>> index 91bf333..55daeff 100644
>> --- a/tools/perf/jvmti/jvmti_agent.c
>> +++ b/tools/perf/jvmti/jvmti_agent.c
>> @@ -59,7 +59,6 @@ static int get_e_machine(struct jitheader *hdr)
>>       ssize_t sret;
>>       char id[16];
>>       int fd, ret = -1;
>> -     int m = -1;
>>       struct {
>>               uint16_t e_type;
>>               uint16_t e_machine;
>> @@ -81,11 +80,7 @@ static int get_e_machine(struct jitheader *hdr)
>>       if (sret != sizeof(info))
>>               goto error;
>>
>> -     m = info.e_machine;
>> -     if (m < 0)
>> -             m = 0; /* ELF EM_NONE */
>> -
>> -     hdr->elf_mach = m;
>> +     hdr->elf_mach = info.e_machine;
>>       ret = 0;
>>  error:
>>       close(fd);