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From: Lance Yang In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Migadu-Flow: FLOW_OUT X-Rspamd-Queue-Id: 0BCC21C0005 X-Rspam-User: X-Rspamd-Server: rspam09 X-Stat-Signature: 6jfnmojdwt48o87yxeithyxmmok3u7yh X-HE-Tag: 1783004953-166670 X-HE-Meta: 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 qas4xQRP WRWckpOap8YJG6LpZVOsfAvqF2QhdWcuotmhodnRxHdpH9a0UCXHBIoIcKYXtIbAVT+zLtYiPEqFadvE6tH/UmYwbnRs2f+MS4/kKWQ2FzGWCxFpZ9jttoSmbeybkCnZnfS4pNWDDQBEbLSJyCwCt13B6EW57+0naYzC0a2Q/GDsBrswMjFi/DUZ/D+mzpgneejDdwzt3Augmx/OWUIz+QOT2kyuXankBZJzaICukxAYlUQf1ef0jLWM7BMuPgLIj57Xv Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 2026/7/2 22:16, Lorenzo Stoakes wrote: > On Thu, Jul 02, 2026 at 07:15:31PM +0800, Lance Yang wrote: [...] >> >> [...] >>> diff --git a/mm/mmap.c b/mm/mmap.c >>> index 46174e706bbe..547352183214 100644 >>> --- a/mm/mmap.c >>> +++ b/mm/mmap.c >> [...] >>> @@ -488,23 +496,27 @@ unsigned long do_mmap(struct file *file, unsigned long addr, >>> * Check to see if we are violating any seals and update VMA >>> * flags if necessary to avoid future seal violations. >>> */ >>> - err = memfd_check_seals_mmap(file, &vm_flags); >>> + err = memfd_check_seals_mmap(file, &vma_flags); >>> if (err) >>> return (unsigned long)err; >>> } else { >>> switch (flags & MAP_TYPE) { >>> case MAP_SHARED: >>> - if (vm_flags & (VM_GROWSDOWN|VM_GROWSUP)) >>> + if (vma_flags_can_grow(&vma_flags)) >>> return -EINVAL; >>> /* >>> * Ignore pgoff. >>> */ >>> pgoff = 0; >>> - vm_flags |= VM_SHARED | VM_MAYSHARE; >>> + vma_flags_set(&vma_flags, VMA_SHARED_BIT, VMA_MAYSHARE_BIT); >>> break; >>> - case MAP_DROPPABLE: >>> - if (VM_DROPPABLE == VM_NONE) >>> + case MAP_DROPPABLE: { >>> + vma_flags_t droppable = VMA_DROPPABLE; >>> + >>> + if (vma_flags_empty(&droppable)) >>> return -EOPNOTSUPP; >>> + vma_flags_set_mask(&vma_flags, droppable); >>> + >>> /* >>> * A locked or stack area makes no sense to be droppable. >>> * >>> @@ -515,23 +527,24 @@ unsigned long do_mmap(struct file *file, unsigned long addr, >>> */ >>> if (flags & (MAP_LOCKED | MAP_HUGETLB)) >>> return -EINVAL; >>> - if (vm_flags & (VM_GROWSDOWN | VM_GROWSUP)) >>> + if (vma_flags_can_grow(&vma_flags)) >>> return -EINVAL; >>> >>> - vm_flags |= VM_DROPPABLE; >> >> Old code checked VM_GROWSDOWN|VM_GROWSUP before seting VM_DROPPABLE. New >> code flips that around. Hmm, shouldn't master, just made me look twice ;) >> >> Maybe keep old order? > > I guess I feared that defining droppable above then referencing it below would > be less clear? > > Can move if you feel strongly about it, and sorry for making the move at the > same time as the general vm_flags_t -> vma_flags_t refactor as it does make that > less clear... No need to churn just for me. Thanks :)