linux-kernel - Re: [vmw_vmci 11/11] Apply the header code to make VMCI build

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Date:	Thu, 2 Aug 2012 21:50:02 +0200 (CEST)
From:	Jan Engelhardt <jengelh@...i.de>
To:	Sam Ravnborg <sam@...nborg.org>
cc:	"Andrew Stiegmann (stieg)" <astiegmann@...are.com>,
	linux-kernel@...r.kernel.org,
	virtualization@...ts.linux-foundation.org, pv-drivers@...are.com,
	vm-crosstalk@...are.com, cschamp@...are.com,
	gregkh@...uxfoundation.org
Subject: Re: [vmw_vmci 11/11] Apply the header code to make VMCI build


On Friday 2012-07-27 12:34, Sam Ravnborg wrote:
>> +#ifndef _VMCI_COMMONINT_H_
>> +#define _VMCI_COMMONINT_H_
>> +
>> +#include <linux/printk.h>
>> +#include <linux/vmw_vmci_defs.h>
>
>Use inverse chrismas tree here.
>Longer include lines first, and soret alphabetically when
>lines are of the same length.

So that's where unreadable include lists come from.
Depth-first lexicographically-sorted is a lot less hassle,
especially when it comes to merging patches that each
add one different include.

>> +/*
>> + * Utilility function that checks whether two entities are allowed
>> + * to interact. If one of them is restricted, the other one must
>> + * be trusted.
>> + */
>> +static inline bool vmci_deny_interaction(uint32_t partOne,
>> +					 uint32_t partTwo)
>
>The kernel types are u32 not uint32_t - these types belongs in user-space.

Not really. uint32_t is the C99 type for a 32-bit quantity, and I see
absolutely zero reason not to use standardized things. The only
exception are header files visible to user space where __u32 should
be used for (obscure) reasons of avoiding naming clashes.

(Obscure because uint32_t is always supposed to be 32 bits.)

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