diff options
| author | Jason Gunthorpe <jgg@nvidia.com> | 2023-01-24 16:34:23 -0400 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-02-09 16:51:43 -0800 |
| commit | 7427c30bea1449a885a1dd9baf991aaad26209ce (patch) | |
| tree | 40e7ddbd22f6f156bcf64e9ba48e569339b9f5f4 /include/linux | |
| parent | b2a72dff85fa27fd80349a4f7fae8a6e9bcbbd15 (diff) | |
| download | lwn-7427c30bea1449a885a1dd9baf991aaad26209ce.tar.gz lwn-7427c30bea1449a885a1dd9baf991aaad26209ce.zip | |
mm/gup: remove obsolete FOLL_LONGTERM comment
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>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/mm_types.h | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 10a1e41f4e70..4396c7bf06d1 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -1053,12 +1053,6 @@ typedef unsigned int __bitwise zap_flags_t; * 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. |