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. Suggested-by: Martin Schwidefsky <[email protected]> Cc: Martin Schwidefsky <[email protected]> Cc: Heiko Carstens <[email protected]> Cc: Matthew Wilcox <[email protected]> Cc: Mike Rapoport <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Kees Cook <[email protected]> Cc: Souptick Joarder <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Michal Hocko <[email protected]> Signed-off-by: David Hildenbrand <[email protected]> --- arch/s390/kernel/vdso.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/arch/s390/kernel/vdso.c b/arch/s390/kernel/vdso.c index ebe748a9f472..9e24d23c26c0 100644 --- a/arch/s390/kernel/vdso.c +++ b/arch/s390/kernel/vdso.c @@ -292,7 +292,6 @@ static int __init vdso_init(void) BUG_ON(vdso32_pagelist == NULL); for (i = 0; i < vdso32_pages - 1; i++) { struct page *pg = virt_to_page(vdso32_kbase + i*PAGE_SIZE); - ClearPageReserved(pg); get_page(pg); vdso32_pagelist[i] = pg; } @@ -310,7 +309,6 @@ static int __init vdso_init(void) BUG_ON(vdso64_pagelist == NULL); for (i = 0; i < vdso64_pages - 1; i++) { struct page *pg = virt_to_page(vdso64_kbase + i*PAGE_SIZE); - ClearPageReserved(pg); get_page(pg); vdso64_pagelist[i] = pg; } -- 2.17.2
