Re: [PATCH v20 4/8] rust: page: convert to `Ownable`'
flat view
From: Alice Ryhl <aliceryhl@google.com>
Date: 2026-08-25 13:21:01
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dri-devel, driver-core, linux-block, linux-fsdevel, linux-mm, linux-pci, linux-pm, linux-pwm, linux-security-module, linux-usb, lkml
On Mon, Aug 24, 2026 at 01:17:56PM +0200, Andreas Hindborg wrote:
quoted hunk ↗ jump to hunk
+ // SAFETY: We just successfully allocated a page, so we now have ownership of the newly + // allocated page. We transfer that ownership to the new `Owned<Page>` object. + // Since `Page` is transparent, we can cast the pointer directly. + Ok(unsafe { Owned::from_raw(page.cast()) })
This doesn't satisfy the safety requirements of Owned::from_raw() because the page may be used with vm_insert_page(), which increments its refcount and causes it to be shared the vma system, and this occurs before Page::release() is called. Alice