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Date: Wed, 29 Apr 2020 18:01:11 +0100 From: James Morse <james.morse@....com> To: Pavel Tatashin <pasha.tatashin@...een.com> Cc: jmorris@...ei.org, sashal@...nel.org, ebiederm@...ssion.com, kexec@...ts.infradead.org, linux-kernel@...r.kernel.org, corbet@....net, catalin.marinas@....com, will@...nel.org, linux-arm-kernel@...ts.infradead.org, maz@...nel.org, vladimir.murzin@....com, matthias.bgg@...il.com, bhsharma@...hat.com, linux-mm@...ck.org, mark.rutland@....com, steve.capper@....com, rfontana@...hat.com, tglx@...utronix.de, selindag@...il.com Subject: Re: [PATCH v9 05/18] arm64: trans_pgd: pass NULL instead of init_mm to *_populate functions 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@....com> Thanks, James
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