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Message-Id: <1380724087-13927-4-git-send-email-jack@suse.cz> Date: Wed, 2 Oct 2013 16:27:44 +0200 From: Jan Kara <jack@...e.cz> To: LKML <linux-kernel@...r.kernel.org> Cc: linux-mm@...ck.org, Jan Kara <jack@...e.cz>, Dan Williams <dan.j.williams@...el.com> Subject: [PATCH 03/26] dma: Use get_user_pages_fast() in dma_pin_iovec_pages() CC: Dan Williams <dan.j.williams@...el.com> Signed-off-by: Jan Kara <jack@...e.cz> --- drivers/dma/iovlock.c | 15 ++++----------- 1 file changed, 4 insertions(+), 11 deletions(-) diff --git a/drivers/dma/iovlock.c b/drivers/dma/iovlock.c index bb48a57c2fc1..8b16332da8a9 100644 --- a/drivers/dma/iovlock.c +++ b/drivers/dma/iovlock.c @@ -95,17 +95,10 @@ struct dma_pinned_list *dma_pin_iovec_pages(struct iovec *iov, size_t len) pages += page_list->nr_pages; /* pin pages down */ - down_read(¤t->mm->mmap_sem); - ret = get_user_pages( - current, - current->mm, - (unsigned long) iov[i].iov_base, - page_list->nr_pages, - 1, /* write */ - 0, /* force */ - page_list->pages, - NULL); - up_read(¤t->mm->mmap_sem); + ret = get_user_pages_fast((unsigned long) iov[i].iov_base, + page_list->nr_pages, + 1, /* write */ + page_list->pages); if (ret != page_list->nr_pages) goto unpin; -- 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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