diff mbox series

[v2,4/9] riscv/vdso: don't clear PG_reserved

Message ID 20190114125903.24845-5-david@redhat.com (mailing list archive)
State New, archived
Headers show
Series mm: PG_reserved cleanups and documentation | expand

Commit Message

David Hildenbrand Jan. 14, 2019, 12:58 p.m. UTC 
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.

Cc: Palmer Dabbelt <palmer@sifive.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Tobias Klauser <tklauser@distanz.ch>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Matthew Wilcox <willy@infradead.org>
Acked-by: Palmer Dabbelt <palmer@sifive.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
---
 arch/riscv/kernel/vdso.c | 1 -
 1 file changed, 1 deletion(-)

Comments

Christoph Hellwig Jan. 15, 2019, 3:36 p.m. UTC | #1 
Looks good,

Reviewed-by: Christoph Hellwig <hch@lst.de>
diff mbox series

Patch

diff --git a/arch/riscv/kernel/vdso.c b/arch/riscv/kernel/vdso.c
index 582cb153eb24..0cd044122234 100644
--- a/arch/riscv/kernel/vdso.c
+++ b/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);