From: David Hildenbrand <david@xxxxxxxxxx> Subject: riscv/vdso: don't clear PG_reserved The VDSO is part of the kernel image and therefore the struct pages are marked as reserved during boot. As we install a special mapping, the actual struct pages will never be exposed to MM via the page tables. We can therefore leave the pages marked as reserved. Link: http://lkml.kernel.org/r/20190114125903.24845-5-david@xxxxxxxxxx Signed-off-by: David Hildenbrand <david@xxxxxxxxxx> Acked-by: Palmer Dabbelt <palmer@xxxxxxxxxx> Reviewed-by: Christoph Hellwig <hch@xxxxxx> Cc: Palmer Dabbelt <palmer@xxxxxxxxxx> Cc: Albert Ou <aou@xxxxxxxxxxxxxxxxx> Cc: Tobias Klauser <tklauser@xxxxxxxxxx> Cc: Michal Hocko <mhocko@xxxxxxxxxx> Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- arch/riscv/kernel/vdso.c | 1 - 1 file changed, 1 deletion(-) --- a/arch/riscv/kernel/vdso.c~riscv-vdso-dont-clear-pg_reserved +++ a/arch/riscv/kernel/vdso.c @@ -54,7 +54,6 @@ static int __init vdso_init(void) struct page *pg; pg = virt_to_page(vdso_start + (i << PAGE_SHIFT)); - ClearPageReserved(pg); vdso_pagelist[i] = pg; } vdso_pagelist[i] = virt_to_page(vdso_data); _
