netdev - [PATCH] vhost: Fix compile time error

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Date:   Sat, 14 Sep 2019 01:44:57 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     "Michael S . Tsirkin" <mst@...hat.com>
Cc:     Jason Wang <jasowang@...hat.com>, kvm@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Guenter Roeck <linux@...ck-us.net>
Subject: [PATCH] vhost: Fix compile time error

Building vhost on 32-bit targets results in the following error.

drivers/vhost/vhost.c: In function 'translate_desc':
include/linux/compiler.h:549:38: error:
	call to '__compiletime_assert_1879' declared with attribute error:
	BUILD_BUG_ON failed: sizeof(_s) > sizeof(long)

Fixes: a89db445fbd7 ("vhost: block speculation of translated descriptors")
Cc: Michael S. Tsirkin <mst@...hat.com>
Cc: Jason Wang <jasowang@...hat.com>
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
---
 drivers/vhost/vhost.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index acabf20b069e..102a0c877007 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -2074,7 +2074,7 @@ static int translate_desc(struct vhost_virtqueue *vq, u64 addr, u32 len,
 		_iov->iov_base = (void __user *)
 			((unsigned long)node->userspace_addr +
 			 array_index_nospec((unsigned long)(addr - node->start),
-					    node->size));
+					    (unsigned long)node->size));
 		s += size;
 		addr += size;
 		++ret;
-- 
2.7.4