linux-kernel - Re: [PATCH v5 1/5] x86/sgx: Introduce a counter to count the sgx_(vepc

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Message-ID: <84b0b4eab4444f6ddb407aee602826020a6f7e6f.camel@intel.com>
Date: Mon, 19 May 2025 11:35:08 +0000
From: "Huang, Kai" <kai.huang@...el.com>
To: "Reshetova, Elena" <elena.reshetova@...el.com>, "Hansen, Dave"
	<dave.hansen@...el.com>
CC: "seanjc@...gle.com" <seanjc@...gle.com>, "linux-sgx@...r.kernel.org"
	<linux-sgx@...r.kernel.org>, "x86@...nel.org" <x86@...nel.org>, "Scarlata,
 Vincent R" <vincent.r.scarlata@...el.com>, "Raynor, Scott"
	<scott.raynor@...el.com>, "Annapurve, Vishal" <vannapurve@...gle.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "Mallick, Asit
 K" <asit.k.mallick@...el.com>, "Aktas, Erdem" <erdemaktas@...gle.com>, "Cai,
 Chong" <chongc@...gle.com>, "bondarn@...gle.com" <bondarn@...gle.com>,
	"jarkko@...nel.org" <jarkko@...nel.org>, "dionnaglaze@...gle.com"
	<dionnaglaze@...gle.com>
Subject: Re: [PATCH v5 1/5] x86/sgx: Introduce a counter to count the
 sgx_(vepc_)open()

On Mon, 2025-05-19 at 10:47 +0000, Huang, Kai wrote:
> > +/* Counter to count the active SGX users */
> > +static atomic64_t sgx_usage_count;
> > +
> > +int sgx_inc_usage_count(void)
> > +{
> > +	atomic64_inc(&sgx_usage_count);
> > +	return 0;
> > +}
> 
> What's the purpose of the returning int?  Seems no caller uses the return value.

I saw your last patch uses the returning value.  Perhaps add a sentence to
mention in the changelog, otherwise it's kinda out of blue.