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[Xen-devel] [RESEND PATCH 7/7] IB/mthca: Use the new FOLL_LONGTERM flag to get_user_pages_fast()
- To: John Hubbard <jhubbard@xxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Michal Hocko <mhocko@xxxxxxxx>, "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Jason Gunthorpe <jgg@xxxxxxxx>, Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>, Paul Mackerras <paulus@xxxxxxxxx>, "David S. Miller" <davem@xxxxxxxxxxxxx>, Martin Schwidefsky <schwidefsky@xxxxxxxxxx>, Heiko Carstens <heiko.carstens@xxxxxxxxxx>, Rich Felker <dalias@xxxxxxxx>, Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, Ralf Baechle <ralf@xxxxxxxxxxxxxx>, Paul Burton <paul.burton@xxxxxxxx>, James Hogan <jhogan@xxxxxxxxxx>
- From: ira.weiny@xxxxxxxxx
- Date: Tue, 19 Feb 2019 21:30:40 -0800
- Cc: linux-fbdev@xxxxxxxxxxxxxxx, kvm@xxxxxxxxxxxxxxx, linux-sh@xxxxxxxxxxxxxxx, linux-fpga@xxxxxxxxxxxxxxx, dri-devel@xxxxxxxxxxxxxxxxxxxxx, linux-mips@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, sparclinux@xxxxxxxxxxxxxxx, Ira Weiny <ira.weiny@xxxxxxxxx>, devel@xxxxxxxxxxxxxxxxxxxx, linux-s390@xxxxxxxxxxxxxxx, rds-devel@xxxxxxxxxxxxxx, linux-scsi@xxxxxxxxxxxxxxx, linux-rdma@xxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, devel@xxxxxxxxxxxxxxxxxx, linux-media@xxxxxxxxxxxxxxx, kvm-ppc@xxxxxxxxxxxxxxx, ceph-devel@xxxxxxxxxxxxxxx, virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx, netdev@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx
- Delivery-date: Wed, 20 Feb 2019 05:31:12 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
From: Ira Weiny <ira.weiny@xxxxxxxxx>
Use the new FOLL_LONGTERM to get_user_pages_fast() to protect against
FS DAX pages being mapped.
Signed-off-by: Ira Weiny <ira.weiny@xxxxxxxxx>
---
drivers/infiniband/hw/mthca/mthca_memfree.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/infiniband/hw/mthca/mthca_memfree.c
b/drivers/infiniband/hw/mthca/mthca_memfree.c
index 112d2f38e0de..8ff0e90d7564 100644
--- a/drivers/infiniband/hw/mthca/mthca_memfree.c
+++ b/drivers/infiniband/hw/mthca/mthca_memfree.c
@@ -472,7 +472,8 @@ int mthca_map_user_db(struct mthca_dev *dev, struct
mthca_uar *uar,
goto out;
}
- ret = get_user_pages_fast(uaddr & PAGE_MASK, 1, FOLL_WRITE, pages);
+ ret = get_user_pages_fast(uaddr & PAGE_MASK, 1,
+ FOLL_WRITE | FOLL_LONGTERM, pages);
if (ret < 0)
goto out;
--
2.20.1
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