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Message-Id: <1380724087-13927-26-git-send-email-jack@suse.cz> Date: Wed, 2 Oct 2013 16:28:06 +0200 From: Jan Kara <jack@...e.cz> To: LKML <linux-kernel@...r.kernel.org> Cc: linux-mm@...ck.org, Jan Kara <jack@...e.cz>, Roland Dreier <roland@...nel.org>, linux-rdma@...r.kernel.org Subject: [PATCH 25/26] ib: Convert mthca_map_user_db() to use get_user_pages_fast() Function mthca_map_user_db() appears to call get_user_pages() without holding mmap_sem. Fix the bug by using get_user_pages_fast() instead which also takes care of the locking. CC: Roland Dreier <roland@...nel.org> CC: linux-rdma@...r.kernel.org Signed-off-by: Jan Kara <jack@...e.cz> --- drivers/infiniband/hw/mthca/mthca_memfree.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/infiniband/hw/mthca/mthca_memfree.c b/drivers/infiniband/hw/mthca/mthca_memfree.c index 7d2e42dd6926..c3543b27a2a7 100644 --- a/drivers/infiniband/hw/mthca/mthca_memfree.c +++ b/drivers/infiniband/hw/mthca/mthca_memfree.c @@ -472,8 +472,7 @@ int mthca_map_user_db(struct mthca_dev *dev, struct mthca_uar *uar, goto out; } - ret = get_user_pages(current, current->mm, uaddr & PAGE_MASK, 1, 1, 0, - pages, NULL); + ret = get_user_pages_fast(uaddr & PAGE_MASK, 1, 1, pages); if (ret < 0) goto out; -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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