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Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Pasha Tatashin , Russell King , Catalin Marinas , Will Deacon , Ryan Roberts , linux-arm-kernel@lists.infradead.org, Huacai Chen , loongarch@lists.linux.dev, "James E.J. Bottomley" , Helge Deller , linux-parisc@vger.kernel.org, Madhavan Srinivasan , Michael Ellerman , linuxppc-dev@lists.ozlabs.org, Paul Walmsley , Palmer Dabbelt , Albert Ou , linux-riscv@lists.infradead.org, Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Gerald Schaefer , linux-s390@vger.kernel.org, "David S. Miller" , Andreas Larsson , sparclinux@vger.kernel.org, Richard Weinberger , Anton Ivanov , Johannes Berg , linux-um@lists.infradead.org, Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , Andy Lutomirski , Peter Zijlstra , Ning Sun , x86@kernel.org, tboot-devel@lists.sourceforge.net, Ard Biesheuvel , Ilias Apalodimas , linux-efi@vger.kernel.org, Vishal Moola , Alistair Popple , "Matthew Wilcox (Oracle)" , linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1784037902; l=1355; i=kevin.brodsky@arm.com; s=20260427; h=from:subject:message-id; bh=rJhmHjtmDwxS2CewudUO1k4saVZojxZevQnlJp6OZ7c=; b=xEbohehI3oM6XdwxICHsVginMSV7tAi9MA1ZH+OAmyTQN4j1iQ5NsQqwBRdPZXQYf6lyJ7RCE SjcaLPZMgbgBfEX879PTsxhhu4WlXQHubYLk+EEaXhOv3f1B8VSkhhq X-Developer-Key: i=kevin.brodsky@arm.com; a=ed25519; pk=N2QG+eJKrvkNovwhhwJhnJ4+ScVfsGCHldmqLfcMTFs= X-Stat-Signature: gxy663imbgu9qreopj84tfc4y7uoppim X-Rspamd-Queue-Id: AF080180002 X-Rspamd-Server: rspam01 X-Rspam-User: X-HE-Tag: 1784038034-490990 X-HE-Meta: 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 NfxadZ32 gKTuXCIU5N+00IVKUXxmdX40U4AeM3PB4IaPoDX4AILQQrghaLFtDopojAbp4+k19hnvAmfA0BR6It6/hh7DEOTEB3f4AZ3i0beemp2r0SbF/XLFQAcYDxiVnmeNs+AAxNfJUDS6yenQWrBdWncW6ZaQgBcWk6xQ6eNQfSjoQOxkkP62Xl/w6zggUzqFP7MyaDoxTf2PnfdJECJdR74zmome73vLdL+s1DLwCUm7/NsfnBYwqSbeMnKbM4M5rmuAMoS2WBx4/XNANzduZ8r8FNIYPvG5zTvHQE437h28AtieAIGXEH9GzZ8PmF+m1e642odxHvXqOnP9JDJyarssXJ/O/IcALuLgnhbffX88WSeHiuOxL9lpwlbOXrg== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: efi_mm is a kernel-owned address space used for EFI runtime mappings, but it is currently treated like a user address space when manipulating its page tables. There does not seem to be a good reason for this, and it creates unnecessary complications when creating its page tables. Mark it with the new MMF_KERNEL flag so that the page table handling treats it like init_mm. In particular, this means that: * Split page table locks are no longer initialised or used for efi_mm's page tables. * pagetable_*_ctor() and pagetable_dtor() no longer need to be called for efi_mm's page tables. Assisted-by: Codex:GPT-5.5 Signed-off-by: Kevin Brodsky --- drivers/firmware/efi/efi.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c index 0327a39d31fa..e5ca45bdc890 100644 --- a/drivers/firmware/efi/efi.c +++ b/drivers/firmware/efi/efi.c @@ -69,6 +69,7 @@ struct mm_struct efi_mm = { .mm_mt = MTREE_INIT_EXT(mm_mt, MM_MT_FLAGS, efi_mm.mmap_lock), .mm_users = ATOMIC_INIT(2), .mm_count = ATOMIC_INIT(1), + .flags = MM_FLAGS_INIT(MMF_KERNEL_MASK), .write_protect_seq = SEQCNT_ZERO(efi_mm.write_protect_seq), MMAP_LOCK_INITIALIZER(efi_mm) .page_table_lock = __SPIN_LOCK_UNLOCKED(efi_mm.page_table_lock), -- 2.51.2