On Tue, Aug 25, 2015 at 09:28:13PM -0400, Dan Williams wrote: > Given that: > > 1/ device ->remove() can not be failed > > 2/ a pmem device may be unbound at any time > > 3/ we do not know what other parts of the kernel are actively using a > 'struct page' from devm_memremap_pages() > > ...provide a facility for active usages of device memory to block pmem > device unbind. With a percpu_ref it should be feasible to take a > reference on a per-I/O or other high frequency basis.
Without a caller of get_page_map this is just adding dead code. I'd suggest to group it in a series with that caller. Also if the page_map gets exposed in a header the name is a bit too generic. memremap_map maybe? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
