On Fri, Oct 31, 2014 at 10:57:06AM +0100, Maxime Ripard wrote: > > On a 3.18-rc2 kernel: > > $ git grep kmap -- crypto/ > crypto/ahash.c: walk->data = kmap(walk->pg); > crypto/ahash.c: walk->data = kmap_atomic(walk->pg); > crypto/async_tx/async_memcpy.c: dest_buf = kmap_atomic(dest) + dest_offset; > crypto/async_tx/async_memcpy.c: src_buf = kmap_atomic(src) + src_offset; > crypto/scatterwalk.c: return kmap_atomic(scatterwalk_page(walk)) + > crypto/shash.c: data = kmap_atomic(sg_page(sg)); > crypto/shash.c: data = kmap_atomic(sg_page(sg)); > > None of the drivers are. What do you mean? It's precisely because the page can be in highmem that we are mapping it. If it's not in highmem it'll be a noop. Admittedly I haven't tested highmem since moving over to x86-64 some years ago, but it definitely used to work on x86-32. Cheers, -- Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
