Re: [PATCH v9 05/18] arm64: trans_pgd: pass NULL instead of init_mm to *_populate functions

[James Morse]

Hi Pavel,

On 26/03/2020 03:24, Pavel Tatashin wrote:
> trans_pgd_* should be independent from mm context because the tables that
> are created by this code are used when there are no mm context around, as
> it is between kernels. Simply replace mm_init's with NULL.

arm64's p?d_populate() helpers don't use the mm parameter, so it doesn't make any
difference. This was originally done so that if we ever needed anything from the mm, we
didn't get a NULL dereference or EL0 behaviour due to a future '!= &init_mm'.

If you think it matters,
Acked-by: James Morse <james.morse@xxxxxxx>


Thanks,

James