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authorLi Wang <li.wang@windriver.com>2020-09-15 02:08:09 +0800
committerMichael S. Tsirkin <mst@redhat.com>2020-10-21 10:34:10 -0400
commit5e5e8736ad2ee1be5d6162177317857460c857c2 (patch)
tree59696d8515fd9ccb10ccf957e7ae689ce4d329fc /drivers
parent7ab4de60028e0e9669b72a5f69f2080f98069b04 (diff)
downloadlinux-5e5e8736ad2ee1be5d6162177317857460c857c2.tar.bz2
vhost: reduce stack usage in log_used
Fix the warning: [-Werror=-Wframe-larger-than=] drivers/vhost/vhost.c: In function log_used: drivers/vhost/vhost.c:1906:1: warning: the frame size of 1040 bytes is larger than 1024 bytes Signed-off-by: Li Wang <li.wang@windriver.com> Link: https://lore.kernel.org/r/1600106889-25013-1-git-send-email-li.wang@windriver.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/vhost/vhost.c2
-rw-r--r--drivers/vhost/vhost.h1
2 files changed, 2 insertions, 1 deletions
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index 9ad45e1d27f0..5c5edd4ff04b 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -1897,7 +1897,7 @@ static int log_write_hva(struct vhost_virtqueue *vq, u64 hva, u64 len)
static int log_used(struct vhost_virtqueue *vq, u64 used_offset, u64 len)
{
- struct iovec iov[64];
+ struct iovec *iov = vq->log_iov;
int i, ret;
if (!vq->iotlb)
diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h
index 9032d3c2a9f4..5fe4b478c215 100644
--- a/drivers/vhost/vhost.h
+++ b/drivers/vhost/vhost.h
@@ -123,6 +123,7 @@ struct vhost_virtqueue {
/* Log write descriptors */
void __user *log_base;
struct vhost_log *log;
+ struct iovec log_iov[64];
/* Ring endianness. Defaults to legacy native endianness.
* Set to true when starting a modern virtio device. */