Messages in this thread | | | Date | Wed, 10 Jun 2015 11:03:35 -0400 | From | Matthew Wilcox <> | Subject | Re: [PATCH v4 2/9] x86: support kmap_atomic_pfn_t() for persistent memory |
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On Wed, Jun 10, 2015 at 02:12:02PM +0200, Christoph Hellwig wrote: > Btw, I don't think this actually is safe without refcounting your kmap > structure. > > The driver model ->remove callback can be called at any time, which > will ioremap the memory and remap the kmap structure. But at this > point a user might still be using it.
Won't the device data structures be pinned by the refcount on the bdev?
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