On Mon, 2020-02-17 at 09:41:35 UTC, Christophe Leroy wrote: > On PPC32, pte_offset_map() does a kmap_atomic() in order to support > page tables allocated in high memory, just like ARM and x86/32. > > But since at least 2008 and commit 8054a3428fbe ("powerpc: Remove dead > CONFIG_HIGHPTE"), page tables are never allocated in high memory. > > When the page is in low mem, kmap_atomic() just returns the page > address but still disable preemption and pagefault. And it is > not an inlined function, so we suffer function call for no reason. > > Make pte_offset_map() the same as pte_offset_kernel() and make > pte_unmap() void, in the same way as PPC64 which doesn't have HIGHMEM. > > Signed-off-by: Christophe Leroy <christophe.le...@c-s.fr>
Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/6453f9ed9d4e4b4cdf201bf34bf460c436bf50ea cheers