Re: [PATCH v10 08/22] kasan, arm64: untag address in __kimg_to_phys and _virt_addr_is_linear

[Andrey Konovalov]

On Wed, Nov 7, 2018 at 7:10 PM, Catalin Marinas <catalin.marinas@xxxxxxx> wrote:
> On Tue, Nov 06, 2018 at 06:30:23PM +0100, Andrey Konovalov wrote:
>> --- a/arch/arm64/include/asm/memory.h
>> +++ b/arch/arm64/include/asm/memory.h
>> @@ -92,6 +92,15 @@
>>  #define KASAN_THREAD_SHIFT   0
>>  #endif
>>
>> +#ifdef CONFIG_KASAN_SW_TAGS
>> +#define KASAN_TAG_SHIFTED(tag)               ((unsigned long)(tag) << 56)
>> +#define KASAN_SET_TAG(addr, tag)     (((addr) & ~KASAN_TAG_SHIFTED(0xff)) | \
>> +                                             KASAN_TAG_SHIFTED(tag))
>> +#define KASAN_RESET_TAG(addr)                KASAN_SET_TAG(addr, 0xff)
>> +#else
>> +#define KASAN_RESET_TAG(addr)                addr
>> +#endif
>
> I think we should reuse the untagged_addr() macro we have in uaccess.h
> (make it more general and move to another header file).

Will do in v11, thanks!