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Y . Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , Long Li , Alexander Shishkin , Maxime Coquelin , Alexandre Torgue , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Bodo Stroesser , "Martin K . Petersen" , David Howells , Marc Dionne , Alexander Viro , Christian Brauner , Jan Kara , David Hildenbrand , "Liam R . Howlett" , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jann Horn , Pedro Falcato , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-mtd@lists.infradead.org, linux-staging@lists.linux.dev, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-afs@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, Ryan Roberts References: From: "Vlastimil Babka (SUSE)" In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: ECB42C000D X-Stat-Signature: iw6pca66gyq7cgkoyh6ba1dewi98ie6w X-Rspam-User: X-Rspamd-Server: rspam04 X-HE-Tag: 1774432718-928549 X-HE-Meta: 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 u1UV+i/T d/lL/dUB5dwMdbC+9AJ++e2k41wGMyhvv+aPNvniuZCEuzba3WTSSNuhVWSWuElrMNXD0L6/GUv3lkzMIC379Ax2sE8DfC23elmxwTQfNctz2KYbJYPq3qIN0N+uwDSJOicktgakj3KxZyKZtiLtG+l1mxErwTrPAOJVpCJYpKE6gsDKT0d0q+wf+VkgvBI2hdAeLH1OBJc5agrC8GsbOfrhlwy75wSJTCSaBvbpDaspLizg0vy8PN/5dpINISlqYeiqXFizlgfLsWwoNOE0E5eHCffZvCZxgL35WME+qjEyEYLoJk/EgGQs958iLsVnF0j43ZIbl2T5Ks8yBW7vn0IlaUX2+CeTiZYKo3CDRFlaQCHi/ErSeZcX8aZM5vD+NSANuMb6QVQeRU9VBO27lcxETifpC0Ekxv7v3Rx/T8Fj/jMk= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 3/20/26 23:39, Lorenzo Stoakes (Oracle) wrote: > Currently drivers use vm_iomap_memory() as a simple helper function for > I/O remapping memory over a range starting at a specified physical address > over a specified length. > > In order to utilise this from mmap_prepare, separate out the core logic > into __simple_ioremap_prep(), update vm_iomap_memory() to use it, and add > simple_ioremap_prepare() to do the same with a VMA descriptor object. > > We also add MMAP_SIMPLE_IO_REMAP and relevant fields to the struct > mmap_action type to permit this operation also. > > We use mmap_action_ioremap() to set up the actual I/O remap operation once > we have checked and figured out the parameters, which makes > simple_ioremap_prepare() easy to implement. > > We then add mmap_action_simple_ioremap() to allow drivers to make use of > this mode. > > We update the mmap_prepare documentation to describe this mode. Finally, > we update the VMA tests to reflect this change. > > Reviewed-by: Suren Baghdasaryan > Signed-off-by: Lorenzo Stoakes (Oracle) Acked-by: Vlastimil Babka (SUSE)