Date: Sat, 09 Jul 2005 10:18:19 -0700 From: Sam Leffler <sam@errno.com> To: ming fu <fming@borderware.com> Cc: freebsd-net@freebsd.org Subject: Re: what to replace splnet in FreeBSD 5.x? Message-ID: <42D006DB.8080108@errno.com> In-Reply-To: <42CEF0EB.4000107@borderware.com> References: <42CEF0EB.4000107@borderware.com>
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ming fu wrote:
> Hi,
>
> With splnet() became a no-op in sys/systm.h
>
> static __inline intrmask_t splnet(void) { return 0; }
>
> What should I use to replace the splnet?
>
> I have a module receiving input from both ip_input() and a device that
> userland can write to. I guess I was cover from the ip_input() as it
> should have the proper lock. However, I am on my own to figure out what
> to replace the splnet() when receive from the device from the userland.
> It uses splnet() in FreeBSD 4.x.
spl's lock execution threads. 5.x and later systems mostly lock data
structures using mtx's (there are a very few exceptions). Thus there
isn't necessarily a direct replacement, you usually need to rethink your
locking/synchronization strategy.
Sam
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