Re: [PATCH] 2.4.18-pre9, trylock for read/write semaphores

From: Alan Cox (alan@lxorguk.ukuu.org.uk)
Date: Tue Feb 12 2002 - 18:29:29 EST

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> + new = old + RWSEM_ACTIVE_READ_BIAS;
> + if (cmpxchg(&sem->count, old, new) == old)
> + return 1;

cmpxchg isnt present on i386

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