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From:   ira.weiny@intel.com
To:     Andrew Morton <akpm@linux-foundation.org>,
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Cc:     Ira Weiny <ira.weiny@intel.com>, linux-mm@kvack.org,
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Subject: [PATCH V3 5/7] IB/hfi1: Use the new FOLL_LONGTERM flag to get_user_pages_fast()
Date:   Thu, 28 Mar 2019 01:44:20 -0700
Message-Id: <20190328084422.29911-6-ira.weiny@intel.com>
In-Reply-To: <20190328084422.29911-1-ira.weiny@intel.com>
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From: Ira Weiny <ira.weiny@intel.com>

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@intel.com>

---
Changes from V2
	Per Dan Williams: set FOLL_LONGTERM on declaration line

 drivers/infiniband/hw/hfi1/user_pages.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/user_pages.c b/drivers/infiniband/hw/hfi1/user_pages.c
index 78ccacaf97d0..02eee8eff1db 100644
--- a/drivers/infiniband/hw/hfi1/user_pages.c
+++ b/drivers/infiniband/hw/hfi1/user_pages.c
@@ -104,9 +104,9 @@ int hfi1_acquire_user_pages(struct mm_struct *mm, unsigned long vaddr, size_t np
 			    bool writable, struct page **pages)
 {
 	int ret;
+	unsigned int gup_flags = FOLL_LONGTERM | (writable ? FOLL_WRITE : 0);
 
-	ret = get_user_pages_fast(vaddr, npages, writable ? FOLL_WRITE : 0,
-				  pages);
+	ret = get_user_pages_fast(vaddr, npages, gup_flags, pages);
 	if (ret < 0)
 		return ret;
 
-- 
2.20.1