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On Mon, 2005-10-03 at 11:57 +0100, Mark Underwood wrote: > > > > > Hmm, using local variables for messages, so DMA adapter drivers have > > > > > to check if this is non-kmalloc'ed space (how?) > > > > > > > > They can't check that. It turns out that most current Linuxes > > > > have no issues DMAing a few bytes from the stack. > > > > > > Will the DMA remapping calls work with data from the stack? > > > > On "most current Linuxes" yes. All I know about, in fact. > > But it's not guaranteed. > > OK. Thanks please NEVER EVER do dma from or to a stack variable. It's not allowed on all architectures and it is really really bad practice in general anyway. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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