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Muhammad Usama Anjum
d46644af76
Page tables are always accessed via the linear mapping with a match-all tag, so HW-tag KASAN never checks them. For page-allocated tables (PTEs and PGDs etc), avoid the tag setup and poisoning overhead by using __GFP_SKIP_KASAN. SLUB-backed page tables are unchanged for now. (They aren't widely used and require more SLUB related skip logic. Leave it later.) Link: https://lore.kernel.org/[email protected] Signed-off-by: Muhammad Usama Anjum <[email protected]> Signed-off-by: Dev Jain <[email protected]> Reviewed-by: Ryan Roberts <[email protected]> Reviewed-by: Catalin Marinas <[email protected]> Acked-by: David Hildenbrand (Arm) <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Ben Segall <[email protected]> Cc: Dietmar Eggemann <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Juri Lelli <[email protected]> Cc: Kees Cook <[email protected]> Cc: K Prateek Nayak <[email protected]> Cc: Liam Howlett <[email protected]> Cc: Lorenzo Stoakes <[email protected]> Cc: Mathieu Desnoyers <[email protected]> Cc: Mel Gorman <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Mike Rapoport <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Suren Baghdasaryan <[email protected]> Cc: "Uladzislau Rezki (Sony)" <[email protected]> Cc: Valentin Schneider <[email protected]> Cc: Vincent Guittot <[email protected]> Cc: Vlastimil Babka <[email protected]> Signed-off-by: Andrew Morton <[email protected]>