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[V3,5/7] IB/hfi1: Use the new FOLL_LONGTERM flag to get_user_pages_fast()

Message ID 20190328084422.29911-6-ira.weiny@intel.com
State Not Applicable
Delegated to: David Miller
Headers show
Series Add FOLL_LONGTERM to GUP fast and use it | expand

Commit Message

Ira Weiny March 28, 2019, 8:44 a.m. UTC 
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(-)
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Patch

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;