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arm64: Use __pa_symbol for empty_zero_page 

If CONFIG_DEBUG_VIRTUAL=y and CONFIG_ARM64_SW_TTBR0_PAN=y:

    virt_to_phys used for non-linear address: ffffff8008cc0000 (empty_zero_page+0x0/0x1000)
    WARNING: CPU: 0 PID: 0 at arch/arm64/mm/physaddr.c:14 __virt_to_phys+0x28/0x60
    ...
    [<ffffff800809abb4>] __virt_to_phys+0x28/0x60
    [<ffffff8008a02600>] setup_arch+0x46c/0x4d4

Fixes: 2077be6783 ("arm64: Use __pa_symbol for kernel symbols")
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Will Deacon <will.deacon@arm.com>
hifive-unleashed-5.1
Geert Uytterhoeven 2017-01-24 12:43:40 +01:00 committed by Will Deacon
parent 4a8d8a14c0
commit cbb999dd0b
1 changed files with 1 additions and 1 deletions
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2
arch/arm64/kernel/setup.c
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@ -298,7 +298,7 @@ void __init setup_arch(char **cmdline_p)
* faults in case uaccess_enable() is inadvertently called by the init
* thread.
*/
init_task.thread_info.ttbr0 = virt_to_phys(empty_zero_page);
init_task.thread_info.ttbr0 = __pa_symbol(empty_zero_page);
#endif
#ifdef CONFIG_VT