From: Ard Biesheuvel Date: Wed, 30 Mar 2016 14:45:56 +0000 (+0200) Subject: arm64: vdso: avoid virt_to_page() translations on kernel symbols X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=97bbb54e4f27f4c63645f603bf767183ee0dd549;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git arm64: vdso: avoid virt_to_page() translations on kernel symbols The translation performed by virt_to_page() is only valid for linear addresses, and kernel symbols are no longer in the linear mapping. So perform the __pa() translation explicitly, which does the right thing in either case, and only then translate to a struct page offset. Signed-off-by: Ard Biesheuvel Signed-off-by: Will Deacon --- diff --git a/arch/arm64/kernel/vdso.c b/arch/arm64/kernel/vdso.c index 97bc68f4c689..64fc030be0f2 100644 --- a/arch/arm64/kernel/vdso.c +++ b/arch/arm64/kernel/vdso.c @@ -131,11 +131,11 @@ static int __init vdso_init(void) return -ENOMEM; /* Grab the vDSO data page. */ - vdso_pagelist[0] = virt_to_page(vdso_data); + vdso_pagelist[0] = pfn_to_page(PHYS_PFN(__pa(vdso_data))); /* Grab the vDSO code pages. */ for (i = 0; i < vdso_pages; i++) - vdso_pagelist[i + 1] = virt_to_page(&vdso_start + i * PAGE_SIZE); + vdso_pagelist[i + 1] = pfn_to_page(PHYS_PFN(__pa(&vdso_start)) + i); /* Populate the special mapping structures */ vdso_spec[0] = (struct vm_special_mapping) {