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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 <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Ard Biesheuvel 2016-03-30 16:45:56 +02:00 committed by Will Deacon
parent 8923a16686
commit 97bbb54e4f
1 changed files with 2 additions and 2 deletions
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4
arch/arm64/kernel/vdso.c
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@ -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) {