On Tuesday 24 July 2007, Russell King wrote: > On Tue, Jul 24, 2007 at 02:29:05PM -0700, David Brownell wrote: > > On at least ARM (and I'm told MIPS too) dma_free_coherent() has a newish > > call context requirement: unlike its dma_alloc_coherent() sibling, it > > may not be called with IRQs disabled. (This was new behavior on ARM as > > of late 2006, caused by ARM SMP updates.) > > I think you got the year wrong: > > 5edf71ae (Russell King 2005-11-25 15:52:51 +0000 364) > WARN_ON(irqs_disabled()); > > which is due to this commit: > > [ARM] Do not call flush_tlb_kernel_range() with IRQs disabled.
This little "to do" list item has been sitting in my mailbox way too long then. Certainly since it was fair to say "last year"! ;) Of course, 2.6.23-rc1 also merges all the gadget API updates I included to cope with this annoyance. So with any luck the issue will now finally have been properly whupped. > Signed-off-by: Russell King <[EMAIL PROTECTED]> Thanks... > > Since it looks like that restriction won't be removed, this patch changes > > the definition of the API to include that requirement. > > The PCI DMA-mapping API had this restriction. For some reason, this > restriction was not carried forward into the DMA-API. Unfortunately > the restriction can not be removed without causing the problems > described in the commit which introduced it. Right, I noticed that. - Dave - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
