linux-kernel - Re: [PATCH v16 03/16] cgroup/misc: Export APIs for SGX driver

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Message-ID: <6ab51a49acb69b90499465c2b00b93eda501862c.camel@intel.com>
Date: Tue, 27 Aug 2024 10:25:16 +0000
From: "Huang, Kai" <kai.huang@...el.com>
To: "chenridong@...wei.com" <chenridong@...wei.com>,
	"linux-sgx@...r.kernel.org" <linux-sgx@...r.kernel.org>,
	"cgroups@...r.kernel.org" <cgroups@...r.kernel.org>, "mkoutny@...e.com"
	<mkoutny@...e.com>, "dave.hansen@...ux.intel.com"
	<dave.hansen@...ux.intel.com>, "haitao.huang@...ux.intel.com"
	<haitao.huang@...ux.intel.com>, "tim.c.chen@...ux.intel.com"
	<tim.c.chen@...ux.intel.com>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "mingo@...hat.com" <mingo@...hat.com>,
	"tglx@...utronix.de" <tglx@...utronix.de>, "tj@...nel.org" <tj@...nel.org>,
	"jarkko@...nel.org" <jarkko@...nel.org>, "Mehta, Sohil"
	<sohil.mehta@...el.com>, "hpa@...or.com" <hpa@...or.com>, "bp@...en8.de"
	<bp@...en8.de>, "x86@...nel.org" <x86@...nel.org>
CC: "mikko.ylinen@...ux.intel.com" <mikko.ylinen@...ux.intel.com>,
	"seanjc@...gle.com" <seanjc@...gle.com>, "anakrish@...rosoft.com"
	<anakrish@...rosoft.com>, "Zhang, Bo" <zhanb@...rosoft.com>,
	"kristen@...ux.intel.com" <kristen@...ux.intel.com>, "yangjie@...rosoft.com"
	<yangjie@...rosoft.com>, "Li, Zhiquan1" <zhiquan1.li@...el.com>,
	"chrisyan@...rosoft.com" <chrisyan@...rosoft.com>
Subject: Re: [PATCH v16 03/16] cgroup/misc: Export APIs for SGX driver

On Tue, 2024-08-20 at 18:53 -0700, Haitao Huang wrote:
> -static struct misc_cg *parent_misc(struct misc_cg *cgroup)
> +struct misc_cg *misc_cg_root(void)
>  {
> -	return cgroup ? css_misc(cgroup->css.parent) : NULL;
> +	return &root_cg;
>  }
> +EXPORT_SYMBOL_GPL(misc_cg_root);
>  

This doesn't need to be exported.  SGX driver cannot be a module.

I tested building the this series with this export removed and the kernel
could be built successfully.