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List:       linux-kernel
Subject:    Re: [Patch] shm bug introduced with pagecache in 2.3.11
From:       Linus Torvalds <torvalds () transmeta ! com>
Date:       1999-11-19 20:19:49
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On Fri, 19 Nov 1999, Benjamin C.R. LaHaise wrote:
> 
> Sure.  Does the following sound?
> 
> 	void down_read(struct rw_semaphore *sem);
> 	void down_write(struct rw_semaphore *sem);
> 	void up_read(struct rw_semaphore *sem);
> 	void up_write(struct rw_semaphore *sem);

Looks fine.

> Looking at existing semaphores and rwlocks, it looks like a quick and
> painless beast to create.

Yeah, sure. 

Especially considering that the current semaphore code has been basically
re-written three times to get it stable ;)

But yes, mixing judicious amounts of the current semaphore code together
with the rw-spinlock code should result in something working.

"Just add brains".

		Linus


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