* Re: [PATCH] WorkStruct: Use direct assignment rather than cmpxchg() [not found] <200612092059.kB9Kx1NC010199@hera.kernel.org> @ 2006-12-09 22:19 ` Benjamin Herrenschmidt 0 siblings, 0 replies; only message in thread From: Benjamin Herrenschmidt @ 2006-12-09 22:19 UTC (permalink / raw) To: David Howells; +Cc: Linux Kernel list > The problem is where we end up tangling with test_and_set_bit() emulated > using spinlocks, and even then it's not a problem _provided_ > test_and_set_bit() doesn't attempt to modify the word if the bit was > set. I'm not 100% sure what is the problem there, but beware that bitops don't provide the same semantics as spinlocks regarding memory ordering. Ben. ^ permalink raw reply [flat|nested] only message in thread
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2006-12-09 22:19 ` [PATCH] WorkStruct: Use direct assignment rather than cmpxchg() Benjamin Herrenschmidt
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