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    SubjectRe: [Patch] shm bug introduced with pagecache in 2.3.11
    On Fri, 19 Nov 1999, Linus Torvalds wrote:

    > Is anybody willing to take a stab at creating a read-write semaphore?

    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);

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


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