linux-kernel - Re: [PATCH V2 02/15] x86/sgx: Rename fallback labels in sgx

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Date:   Fri, 29 Oct 2021 10:59:03 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     Reinette Chatre <reinette.chatre@...el.com>, jarkko@...nel.org,
        linux-sgx@...r.kernel.org, shuah@...nel.org,
        dave.hansen@...ux.intel.com
Cc:     seanjc@...gle.com, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH V2 02/15] x86/sgx: Rename fallback labels in sgx_init()

On 10/28/21 1:37 PM, Reinette Chatre wrote:
> -err_provision:
> +err_driver:
>  	misc_deregister(&sgx_dev_provision);
>  
> -err_kthread:
> +err_provision:
>  	kthread_stop(ksgxd_tsk);
>  
> -err_page_cache:
> +err_reclaimer:
>  	for (i = 0; i < sgx_nr_epc_sections; i++) {
>  		vfree(sgx_epc_sections[i].pages);
>  		memunmap(sgx_epc_sections[i].virt_addr);

This isn't the normal pattern we use in the kernel.

Usually, we say what is being *DONE* at the label, almost like we are
calling a function.  Here's a random example from one of the most
prolific users of gotos in arch/x86:

        ret = kernfs_get_tree(fc);
        if (ret < 0)
                goto out_psl;
...
out_psl:
        rdt_pseudo_lock_release();

See?  The "psl" is doing a "pseudo lock release".

I don't particularly like the labels as-is, but this patch makes them
less clear, IMNHO.  Let's just drop this patch for now, please.