From mboxrd@z Thu Jan 1 00:00:00 1970 From: ira.weiny@intel.com Date: Sun, 17 Mar 2019 18:34:36 +0000 Subject: [RESEND 5/7] IB/hfi1: Use the new FOLL_LONGTERM flag to get_user_pages_fast() Message-Id: <20190317183438.2057-6-ira.weiny@intel.com> List-Id: References: <20190317183438.2057-1-ira.weiny@intel.com> In-Reply-To: <20190317183438.2057-1-ira.weiny@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Andrew Morton , John Hubbard , Michal Hocko , "Kirill A. Shutemov" , Peter Zijlstra , Jason Gunthorpe , Benjamin Herrenschmidt , Paul Mackerras , "David S. Miller" , Martin Schwidefsky , Heiko Carstens , Rich Felker , Yoshinori Sato , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Ralf Baechle , James Hogan Cc: Ira Weiny , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org From: Ira Weiny Use the new FOLL_LONGTERM to get_user_pages_fast() to protect against FS DAX pages being mapped. Signed-off-by: Ira Weiny --- drivers/infiniband/hw/hfi1/user_pages.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/infiniband/hw/hfi1/user_pages.c b/drivers/infiniband/hw/hfi1/user_pages.c index 78ccacaf97d0..6a7f9cd5a94e 100644 --- a/drivers/infiniband/hw/hfi1/user_pages.c +++ b/drivers/infiniband/hw/hfi1/user_pages.c @@ -104,9 +104,11 @@ 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 = 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; -- 2.20.1