linux-kernel - Re: [take17 1/4] kevent: Core files.

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Message-ID: <20060908063808.GA28736@2ka.mipt.ru>
Date:	Fri, 8 Sep 2006 10:38:09 +0400
From:	Evgeniy Polyakov <johnpol@....mipt.ru>
To:	shaw@...nix.com
Cc:	lkml <linux-kernel@...r.kernel.org>,
	David Miller <davem@...emloft.net>,
	Ulrich Drepper <drepper@...hat.com>,
	Andrew Morton <akpm@...l.org>, netdev <netdev@...r.kernel.org>,
	Zach Brown <zach.brown@...cle.com>,
	Christoph Hellwig <hch@...radead.org>,
	Chase Venters <chase.venters@...entec.com>,
	Johann Borck <johann.borck@...sedata.com>
Subject: Re: [take17 1/4] kevent: Core files.

On Thu, Sep 07, 2006 at 09:05:16PM -0700, shaw@...nix.com (shaw@...nix.com) wrote:
> > +static int __devinit kevent_user_init(void)
> > +{
> > +	int err = 0;
> > +
> > +	kevent_cache = kmem_cache_create("kevent_cache",
> > +			sizeof(struct kevent), 0, SLAB_PANIC, NULL, NULL);
> > +
> > +	err = misc_register(&kevent_miscdev);
> > +	if (err) {
> > +		printk(KERN_ERR "Failed to register kevent miscdev: err=%d.\n", err);
> > +		goto err_out_exit;
> > +	}
> > +
> > +	printk("KEVENT subsystem has been successfully registered.\n");
> > +
> > +	return 0;
> > +
> > +err_out_exit:
> > +	kmem_cache_destroy(kevent_cache);
> > +	return err;
> > +}
> 
> It's probably best to treat kmem_cache_create like a black box and check for 
> it returning null.

It can not return NULL, it will panic instead since I use SLAB_PANIC
flag.

> Thanks,
> Shaw

-- 
	Evgeniy Polyakov
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