[merged mm-stable] mm-gup-remove-obsolete-foll_longterm-comment.patch removed from -mm tree

[merged mm-stable] mm-gup-remove-obsolete-foll_longterm-comment.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm/gup: remove obsolete FOLL_LONGTERM comment
has been removed from the -mm tree.  Its filename was
     mm-gup-remove-obsolete-foll_longterm-comment.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Jason Gunthorpe <jgg@nvidia.com>
Subject: mm/gup: remove obsolete FOLL_LONGTERM comment
Date: Tue, 24 Jan 2023 16:34:23 -0400

These days FOLL_LONGTERM is not allowed at all on any get_user_pages*()
functions, it must be only be used with pin_user_pages*(), plus it now has
universal support for all the pin_user_pages*() functions.

Link: https://lkml.kernel.org/r/2-v2-987e91b59705+36b-gup_tidy_jgg@nvidia.com
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Mike Rapoport (IBM) <rppt@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/mm_types.h |    6 ------
 1 file changed, 6 deletions(-)

--- a/include/linux/mm_types.h~mm-gup-remove-obsolete-foll_longterm-comment
+++ a/include/linux/mm_types.h
@@ -1053,12 +1053,6 @@ typedef unsigned int __bitwise zap_flags
  * specifically failed.  Filesystem pages are still subject to bugs and use of
  * FOLL_LONGTERM should be avoided on those pages.
  *
- * FIXME: Also NOTE that FOLL_LONGTERM is not supported in every GUP call.
- * Currently only get_user_pages() and get_user_pages_fast() support this flag
- * and calls to get_user_pages_[un]locked are specifically not allowed.  This
- * is due to an incompatibility with the FS DAX check and
- * FAULT_FLAG_ALLOW_RETRY.
- *
  * In the CMA case: long term pins in a CMA region would unnecessarily fragment
  * that region.  And so, CMA attempts to migrate the page before pinning, when
  * FOLL_LONGTERM is specified.
_

Patches currently in -mm which might be from jgg@nvidia.com are