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Re: [PATCH RFC 06/11] mm/kasan: use hw_pte_t for the early shadow PTE table
- To: Alexander Gordeev <agordeev@xxxxxxxxxxxxx>
- From: Muhammad Usama Anjum <usama.anjum@xxxxxxx>
- Date: Thu, 30 Jul 2026 14:11:22 +0100
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- Cc: usama.anjum@xxxxxxx, Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>, Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>, Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>, Tvrtko Ursulin <tursulin@xxxxxxxxxxx>, David Airlie <airlied@xxxxxxxxx>, Simona Vetter <simona@xxxxxxxx>, Dimitri Sivanich <dimitri.sivanich@xxxxxxx>, Arnd Bergmann <arnd@xxxxxxxx>, Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>, "James E.J. Bottomley" <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>, Helge Deller <deller@xxxxxx>, Juergen Gross <jgross@xxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Muchun Song <muchun.song@xxxxxxxxx>, Oscar Salvador <osalvador@xxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, "Liam R. Howlett" <liam@xxxxxxxxxxxxx>, Lorenzo Stoakes <ljs@xxxxxxxxxx>, Will Deacon <will@xxxxxxxxxx>, "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxx>, Nick Piggin <npiggin@xxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Andrey Ryabinin <ryabinin.a.a@xxxxxxxxx>, David Hildenbrand <david@xxxxxxxxxx>, Pasha Tatashin <pasha.tatashin@xxxxxxxxxx>, Chris Li <chrisl@xxxxxxxxxx>, Kairui Song <kasong@xxxxxxxxxxx>, Uladzislau Rezki <urezki@xxxxxxxxx>, Steven Rostedt <rostedt@xxxxxxxxxxx>, Masami Hiramatsu <mhiramat@xxxxxxxxxx>, Alexei Starovoitov <ast@xxxxxxxxxx>, Daniel Borkmann <daniel@xxxxxxxxxxxxx>, Andrii Nakryiko <andrii@xxxxxxxxxx>, Eduard Zingerman <eddyz87@xxxxxxxxx>, Kumar Kartikeya Dwivedi <memxor@xxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>, Namhyung Kim <namhyung@xxxxxxxxxx>, SJ Park <sj@xxxxxxxxxx>, "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>, Jan Kara <jack@xxxxxxx>, Jason Gunthorpe <jgg@xxxxxxxx>, Leon Romanovsky <leon@xxxxxxxxxx>, Miaohe Lin <linmiaohe@xxxxxxxxxx>, Dennis Zhou <dennis@xxxxxxxxxx>, Tejun Heo <tj@xxxxxxxxxx>, Christoph Lameter <cl@xxxxxxxxxx>, Mike Rapoport <rppt@xxxxxxxxxx>, Johannes Weiner <hannes@xxxxxxxxxxx>, ziy@xxxxxxxxxx, pfalcato@xxxxxxx, ryan.roberts@xxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, intel-gfx@xxxxxxxxxxxxxxxxxxxxx, dri-devel@xxxxxxxxxxxxxxxxxxxxx, linux-parisc@xxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, linux-arch@xxxxxxxxxxxxxxx, kasan-dev@xxxxxxxxxxxxxxxx, linux-trace-kernel@xxxxxxxxxxxxxxx, bpf@xxxxxxxxxxxxxxx, linux-perf-users@xxxxxxxxxxxxxxx, damon@xxxxxxxxxxxxxxx
- Delivery-date: Thu, 30 Jul 2026 13:12:46 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Nodisclaimer: true
On 30/07/2026 12:26 pm, Alexander Gordeev wrote:
> On Mon, Jul 27, 2026 at 05:46:57PM +0100, Muhammad Usama Anjum wrote:
>> diff --git a/mm/ptdump.c b/mm/ptdump.c
>> index 376880071ca2a..8f19f20be3c44 100644
>> --- a/mm/ptdump.c
>> +++ b/mm/ptdump.c
>> @@ -19,7 +19,7 @@ static inline int note_kasan_page_table(struct mm_walk
>> *walk,
>> {
>> struct ptdump_state *st = walk->private;
>>
>> - st->note_page_pte(st, addr, kasan_early_shadow_pte[0]);
>> + st->note_page_pte(st, addr, ptep_get(kasan_early_shadow_pte));
>>
>> walk->action = ACTION_CONTINUE;
>
> I suppose this chunk could be posted as a follow-up to commit c33c794828f2
> ("mm: ptep_get() conversion") independent of this series.
This hunk has to be changed when the type of kasan_early_shadow_pte is changed
to hw_pte_t as note_page_pte() expects a pte.
--
Thanks,
Usama
|
