linux-kernel - Re: [PATCH 1/5] proc: Make the generation of the self symlink table driven.

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Message-ID: <m11wqmmxfw.fsf@ebiederm.dsl.xmission.com>
Date:	Fri, 08 Sep 2006 05:04:19 -0600
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
Cc:	Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/5] proc: Make the generation of the self symlink table driven.

Jan Engelhardt <jengelh@...ux01.gwdg.de> writes:

>>> +static struct pid_entry proc_base_stuff[] = {
>>> +	NOD(PROC_TGID_INO, 	"self", S_IFLNK|S_IRWXUGO,
>>> +		&proc_self_inode_operations, NULL, {}),
>>> +	{}
>>> +};
>>
>>We could save a bunch of bytes here.
>>
>>> +	/* Lookup the directory entry */
>>> +	for (p = proc_base_stuff; p->name; p++) {
>>
>>By using ARRAY_SIZE here.
>>
>>> +	for (; nr < (ARRAY_SIZE(proc_base_stuff) - 1); filp->f_pos++, nr++) {
>>
>>like that does.
>
> Also works without the () around ARRAY_SIZE(..)-1

Sure.  But I don't really trust C precedence (because it is wrong)
and having to remember where it is wrong sucks.  Plus in this
case I really am making it clear that ARRAY_SIZE(..)-1 is the concept
I want.   If there would any more to the expression that would
be important.

Eric
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