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Howlett" , Vlastimil Babka , Jann Horn , Pedro Falcato , Mike Rapoport , Suren Baghdasaryan , Kees Cook , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Vineet Gupta , Russell King , Catalin Marinas , Will Deacon , Brian Cain , Huacai Chen , WANG Xuerui , Thomas Bogendoerfer , Dinh Nguyen , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H . Peter Anvin" , Richard Weinberger , Anton Ivanov , Johannes Berg , Alexander Viro , Christian Brauner , Jan Kara , Xu Xin , Chengming Zhou , Michal Hocko , Paul Moore , Stephen Smalley , Ondrej Mosnacek , linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-hexagon@vger.kernel.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-um@lists.infradead.org, linux-fsdevel@vger.kernel.org, selinux@vger.kernel.org Subject: [PATCH v2 03/23] mm/vma: add further vma_flags_t unions Date: Mon, 16 Mar 2026 13:07:52 +0000 Message-ID: X-Mailer: git-send-email 2.53.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 7C12110000A X-Rspamd-Server: rspam07 X-Stat-Signature: zxn4qjfy49dpbpcnh4epeuit7fbpzonu X-Rspam-User: X-HE-Tag: 1773666543-747513 X-HE-Meta: U2FsdGVkX1/a/AiXImd7BRrwmwdugMlgc6qRCfkv4M6SUhdPZ36O4cv7nER6jVTK4EU8by5PQULL50hQa3cOEIdQpWoDzU/0e1hKDqJAcx2BE3/H3FNEYvl5SGWkKPn0lFXfZ6ExHQ4Ev1v60mw1xAMzg+ymB2V22K7nzn4LTV20fkdufDTrhuLLYS+u7HPt8GtmsP4x1n63udu43OYqsClx7dSyCNZ7QXqKTgqiURxE5cfsndqmu8vjAQWIsZFf9BB5N1HFZZdqQCZsMeYsYh3jv4q5uZ9CLiEp8R25ZLYF3doKGEoQyBHdOKdY02iEUoCDThzI65BeAie3hiagr+o7sHtxbFb9MItxuATg/XpfjgrmfET3CZ9y17EdOle06F6RwYM68E5Ej6Nuh8Y7VPbEKURyzqRGNRLiocGbCBWSrDyYXj0qE/r4Jl3Ugfb/wE+2H48zWCOJid82T+/X2iJyAkHGgReNCDRCh3vtvbhH39tDA8snO1/xhafLA82SkTunoS9nKkSEKK7NxpGaStkcLeGxm0lAfi5R3AaZS665keXWuRl7rbYujUqVUIQGewk3P7bJInG33AGSRWSo9peUq2AiGSVkMbDVzWJIzqxRy7WlpY1ZqvuqWdRIJpj3edWZ/79msDS7wfD3Hw1iuObFlfJrOPtrB9PFL0/EycJeyg79uPGSQAcDEpl9WfrDp5/iVPoQ8cHNhw4E8G0Lj4iCdqfeD5jZzmMh9kwLC0GTIoFhk7GegNAnca5fUXXwSZJZ+MlMFe0+77JdJPkh2+0D0yNCqOqvoJL4269Deo0Hp4k0c4zhjfJR8LYLfsqnQk2lqgivsfBRJKLemM8zaIbHks0Z5wvYQnxHtD5GB/cgsHgcRLJ1VAVE9wdo9XBrN+zKf0LnYDq+9G4kblKa/5fFbyb5Qlmn+HWZ3zZoxbPEMdEQvY+xJl/GcZxSDbGoGufDfz3ASfFNs/64Rk9 qolQ7ECq h6N91eEiKctVspb+0RlGXnMAl892CpbB3x0x0+STbRP/KqOUHA4LG/eMAcDObeG3QbcbjMrwBfMAREC6ApaMvMwd2qCKaleT45HyPVcLueEXznadtxGvyrV2DcqJpDrqNpk5ubbsB+WBap24lH58ilrEDwzLVz4gzIzGpWvhwnwM6ICyhfe9m6MAkV7lMyaO/IWwAJJ3FczZiaEItvrGw520qF/hoOk4IQSgTBHFZpd+KEG6W31u9AiU92Jy3gP3Vs8rM+eggrLTyS3Q1WeGPgq6l8TcRYH6HOoyRUA13F9HSxM0ABbN65/Y6Fs017s7pCn4RWjMC1WiNCyBCnf7/95jdXuJJ7CW7nL7K Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: In order to utilise the new vma_flags_t type, we currently place it in union with legacy vm_flags fields of type vm_flags_t to make the transition smoother. Add vma_flags_t union entries for mm->def_flags and vmg->vm_flags - mm->def_vma_flags and vmg->vma_flags respectively. Once the conversion is complete, these will be replaced with vma_flags_t entries alone. Also update the VMA tests to reflect the change. Signed-off-by: Lorenzo Stoakes (Oracle) --- include/linux/mm_types.h | 6 +++++- mm/vma.h | 6 +++++- tools/testing/vma/include/dup.h | 5 ++++- 3 files changed, 14 insertions(+), 3 deletions(-) diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index ad414ff2d815..ea76821c01e3 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -1262,7 +1262,11 @@ struct mm_struct { unsigned long data_vm; /* VM_WRITE & ~VM_SHARED & ~VM_STACK */ unsigned long exec_vm; /* VM_EXEC & ~VM_WRITE & ~VM_STACK */ unsigned long stack_vm; /* VM_STACK */ - vm_flags_t def_flags; + union { + /* Temporary while VMA flags are being converted. */ + vm_flags_t def_flags; + vma_flags_t def_vma_flags; + }; /** * @write_protect_seq: Locked when any thread is write diff --git a/mm/vma.h b/mm/vma.h index eba388c61ef4..cf8926558bf6 100644 --- a/mm/vma.h +++ b/mm/vma.h @@ -98,7 +98,11 @@ struct vma_merge_struct { unsigned long end; pgoff_t pgoff; - vm_flags_t vm_flags; + union { + /* Temporary while VMA flags are being converted. */ + vm_flags_t vm_flags; + vma_flags_t vma_flags; + }; struct file *file; struct anon_vma *anon_vma; struct mempolicy *policy; diff --git a/tools/testing/vma/include/dup.h b/tools/testing/vma/include/dup.h index 13c03bf247bc..e1ec818de239 100644 --- a/tools/testing/vma/include/dup.h +++ b/tools/testing/vma/include/dup.h @@ -33,7 +33,10 @@ struct mm_struct { unsigned long exec_vm; /* VM_EXEC & ~VM_WRITE & ~VM_STACK */ unsigned long stack_vm; /* VM_STACK */ - unsigned long def_flags; + union { + vm_flags_t def_flags; + vma_flags_t def_vma_flags; + }; mm_flags_t flags; /* Must use mm_flags_* helpers to access */ }; -- 2.53.0