Christophe Leroy 6453f9ed9d powerpc/mm: Don't kmap_atomic() in pte_offset_map() on PPC32 ... 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 8054a3428f ("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.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/03c97f0f6b3790d164822563be80f2fd4713a955.1581932480.git.christophe.leroy@c-s.fr		2020-03-04 22:44:27 +11:00
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32	powerpc/mm: Don't kmap_atomic() in pte_offset_map() on PPC32	2020-03-04 22:44:27 +11:00
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hugetlb-book3e.h
mmu-book3e.h
mmu.h
pgalloc.h
pgtable.h
pte-book3e.h
tlbflush.h