The patch titled
Subject: IB/hfi1: use the new FOLL_LONGTERM flag to get_user_pages_fast()
has been added to the -mm tree. Its filename is
ib-hfi1-use-the-new-foll_longterm-flag-to-get_user_pages_fast.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/ib-hfi1-use-the-new-foll_longterm-flag-to-get_user_pages_fast.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/ib-hfi1-use-the-new-foll_longterm-flag-to-get_user_pages_fast.patch
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------------------------------------------------------
From: Ira Weiny <ira.weiny@xxxxxxxxx>
Subject: IB/hfi1: use the new FOLL_LONGTERM flag to get_user_pages_fast()
Use the new FOLL_LONGTERM to get_user_pages_fast() to protect against FS
DAX pages being mapped.
Link: http://lkml.kernel.org/r/20190317183438.2057-6-ira.weiny@xxxxxxxxx
Signed-off-by: Ira Weiny <ira.weiny@xxxxxxxxx>
Cc: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: James Hogan <jhogan@xxxxxxxxxx>
Cc: Jason Gunthorpe <jgg@xxxxxxxx>
Cc: John Hubbard <jhubbard@xxxxxxxxxx>
Cc: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: Rich Felker <dalias@xxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/infiniband/hw/hfi1/user_pages.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/drivers/infiniband/hw/hfi1/user_pages.c~ib-hfi1-use-the-new-foll_longterm-flag-to-get_user_pages_fast
+++ a/drivers/infiniband/hw/hfi1/user_pages.c
@@ -104,9 +104,11 @@ int hfi1_acquire_user_pages(struct mm_st
bool writable, struct page **pages)
{
int ret;
+ unsigned int gup_flags = writable ? FOLL_WRITE : 0;
- ret = get_user_pages_fast(vaddr, npages, writable ? FOLL_WRITE : 0,
- pages);
+ gup_flags |= FOLL_LONGTERM;
+
+ ret = get_user_pages_fast(vaddr, npages, gup_flags, pages);
if (ret < 0)
return ret;
_
Patches currently in -mm which might be from ira.weiny@xxxxxxxxx are
mm-gup-replace-get_user_pages_longterm-with-foll_longterm.patch
mm-gup-change-write-parameter-to-flags-in-fast-walk.patch
mm-gup-change-gup-fast-to-use-flags-rather-than-a-write-bool.patch
mm-gup-add-foll_longterm-capability-to-gup-fast.patch
ib-hfi1-use-the-new-foll_longterm-flag-to-get_user_pages_fast.patch
ib-qib-use-the-new-foll_longterm-flag-to-get_user_pages_fast.patch
ib-mthca-use-the-new-foll_longterm-flag-to-get_user_pages_fast.patch
