From mboxrd@z Thu Jan  1 00:00:00 1970
From: Panu Matilainen <pmatilai@redhat.com>
Subject: Re: [PATCH v3 2/2] eal/linux: Add support for handling
 built-in kernel modules
Date: Tue, 8 Dec 2015 09:25:23 +0200
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References: <1449507460-32038-1-git-send-email-Kamil.Rytarowski@caviumnetworks.com>
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 <20151207125524.1095237c@xeon-e3>
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To: Stephen Hemminger <stephen@networkplumber.org>,
 Kamil Rytarowski <Kamil.Rytarowski@caviumnetworks.com>
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On 12/07/2015 10:55 PM, Stephen Hemminger wrote:
> On Mon, 7 Dec 2015 19:36:05 +0100
> Kamil Rytarowski <Kamil.Rytarowski@caviumnetworks.com> wrote:
>
>> +	/* Check if there is sysfs mounted */
>> +	if (stat("/sys/module", &st) != 0) {
>> +		RTE_LOG(DEBUG, EAL, "Open /sys/module failed: %s\n",
>> +			strerror(errno));
>>   		return -1;
>>   	}
>
> This check is useless.
> If /sys/module does not exist then /sys/module/XXX won't exist either.

Yes, but non-mounted sysfs is an error whereas /sys/module/XXX is merely 
an existence test, and the current sole caller in pci_vfio_enable() even 
bothers checking for the difference. So its perhaps a bit academic but 
its not incorrect.

At any rate, the debug messages are incorrect/misleading. It's certainly 
not trying to *open* these directories so it should not claim to do so.

	- Panu -