+ docs-driver-api-uio-howto-document-mmap_prepare-callback.patch added to mm-hotfixes-unstable branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: Docs/driver-api/uio-howto: document mmap_prepare callback
has been added to the -mm mm-hotfixes-unstable branch.  Its filename is
     docs-driver-api-uio-howto-document-mmap_prepare-callback.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/docs-driver-api-uio-howto-document-mmap_prepare-callback.patch

This patch will later appear in the mm-hotfixes-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Doehyun Baek <doehyunbaek@gmail.com>
Subject: Docs/driver-api/uio-howto: document mmap_prepare callback
Date: Mon, 22 Jun 2026 18:18:21 +0000

The UIO howto still documents an mmap callback in struct uio_info.  That
field was replaced by mmap_prepare, which takes a struct vm_area_desc.

A UIO driver following the current howto no longer builds because struct
uio_info has no mmap member.  Update the documented callback signature and
matching text to match the current API.

Link: https://lore.kernel.org/20260622181821.1195257-1-doehyunbaek@gmail.com
Fixes: 933f05f58ac6 ("uio: replace deprecated mmap hook with mmap_prepare in uio_info")
Signed-off-by: Doehyun Baek <doehyunbaek@gmail.com>
Reviewed-by: Lorenzo Stoakes <ljs@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 Documentation/driver-api/uio-howto.rst |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/Documentation/driver-api/uio-howto.rst~docs-driver-api-uio-howto-document-mmap_prepare-callback
+++ a/Documentation/driver-api/uio-howto.rst
@@ -246,10 +246,10 @@ the members are required, others are opt
    hardware interrupt number. The flags given here will be used in the
    call to :c:func:`request_irq()`.
 
--  ``int (*mmap)(struct uio_info *info, struct vm_area_struct *vma)``:
+-  ``int (*mmap_prepare)(struct uio_info *info, struct vm_area_desc *desc)``:
    Optional. If you need a special :c:func:`mmap()`
    function, you can set it here. If this pointer is not NULL, your
-   :c:func:`mmap()` will be called instead of the built-in one.
+   ``mmap_prepare`` will be called instead of the built-in one.
 
 -  ``int (*open)(struct uio_info *info, struct inode *inode)``:
    Optional. You might want to have your own :c:func:`open()`,
_

Patches currently in -mm which might be from doehyunbaek@gmail.com are

docs-driver-api-uio-howto-document-mmap_prepare-callback.patch