linux-kernel - [PATCH] pvcalls-front: Replace GFP_KERNEL with GFP_ATOMIC in create

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Message-Id: <1547480909-11844-1-git-send-email-wdjjwb@163.com>
Date:   Mon, 14 Jan 2019 23:48:29 +0800
From:   wangbo <wdjjwb@....com>
To:     linux-kernel@...r.kernel.org
Cc:     jgross@...e.com, sstabellini@...nel.org,
        xen-devel@...ts.xenproject.org, wang.bo116@....com.cn,
        wangbo <wdjjwb@....com>
Subject: [PATCH] pvcalls-front: Replace GFP_KERNEL with GFP_ATOMIC in create_active

Create_active may called inside spinlock,replace GFP_KERNEL with GFP_ATOMIC

Signed-off-by: wangbo <wang.bo116@....com.cn>
---
 drivers/xen/pvcalls-front.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/xen/pvcalls-front.c b/drivers/xen/pvcalls-front.c
index 77224d8..31bd3c9 100644
--- a/drivers/xen/pvcalls-front.c
+++ b/drivers/xen/pvcalls-front.c
@@ -344,11 +344,11 @@ static int create_active(struct sock_mapping *map, int *evtchn)
 	init_waitqueue_head(&map->active.inflight_conn_req);
 
 	map->active.ring = (struct pvcalls_data_intf *)
-		__get_free_page(GFP_KERNEL | __GFP_ZERO);
+		__get_free_page(GFP_ATOMIC | __GFP_ZERO);
 	if (map->active.ring == NULL)
 		goto out_error;
 	map->active.ring->ring_order = PVCALLS_RING_ORDER;
-	bytes = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
+	bytes = (void *)__get_free_pages(GFP_ATOMIC | __GFP_ZERO,
 					PVCALLS_RING_ORDER);
 	if (bytes == NULL)
 		goto out_error;
-- 
2.7.4