Re: [Patch] shm bug introduced with pagecache in 2.3.11

Linus Torvalds (
Fri, 19 Nov 1999 12:19:49 -0800 (PST)

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".


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