linux-kernel - [PATCH v4 9/9] xen/privcmd-buf.c: Convert to use vm_insert

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Message-ID: <20181217202644.GA19376@jordon-HP-15-Notebook-PC>
Date:   Tue, 18 Dec 2018 01:56:44 +0530
From:   Souptick Joarder <jrdr.linux@...il.com>
To:     akpm@...ux-foundation.org, willy@...radead.org, mhocko@...e.com,
        boris.ostrovsky@...cle.com, jgross@...e.com
Cc:     xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org
Subject: [PATCH v4 9/9] xen/privcmd-buf.c: Convert to use vm_insert_range

Convert to use vm_insert_range() to map range of kernel
memory to user vma.

Signed-off-by: Souptick Joarder <jrdr.linux@...il.com>
Reviewed-by: Matthew Wilcox <willy@...radead.org>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@...cle.com>
---
 drivers/xen/privcmd-buf.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/xen/privcmd-buf.c b/drivers/xen/privcmd-buf.c
index df1ed37..d31b837 100644
--- a/drivers/xen/privcmd-buf.c
+++ b/drivers/xen/privcmd-buf.c
@@ -180,12 +180,8 @@ static int privcmd_buf_mmap(struct file *file, struct vm_area_struct *vma)
 	if (vma_priv->n_pages != count)
 		ret = -ENOMEM;
 	else
-		for (i = 0; i < vma_priv->n_pages; i++) {
-			ret = vm_insert_page(vma, vma->vm_start + i * PAGE_SIZE,
-					     vma_priv->pages[i]);
-			if (ret)
-				break;
-		}
+		ret = vm_insert_range(vma, vma->vm_start, vma_priv->pages,
+					vma_priv->n_pages);
 
 	if (ret)
 		privcmd_buf_vmapriv_free(vma_priv);
-- 
1.9.1