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From: Stefano Stabellini <sstabellini@kernel.org>
To: jgross@suse.com, boris.ostrovsky@oracle.com
Cc: sstabellini@kernel.org, xen-devel@lists.xenproject.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH] pvcalls-front: 64-bit align flags
Date: Tue, 27 Feb 2018 11:54:57 -0800 (PST)	[thread overview]
Message-ID: <alpine.DEB.2.10.1802271150020.4239@sstabellini-ThinkPad-X260> (raw)

We are using test_and_* operations on the status and flag fields of
struct sock_mapping. However, these functions require the operand to be
64-bit aligned on arm64. Currently, only status is 64-bit aligned.

Make flags 64-bit aligned by introducing an explicit padding field.

Signed-off-by: Stefano Stabellini <stefano@aporeto.com>

diff --git a/drivers/xen/pvcalls-front.c b/drivers/xen/pvcalls-front.c
index ca5b773..aa07b2a 100644
--- a/drivers/xen/pvcalls-front.c
+++ b/drivers/xen/pvcalls-front.c
@@ -78,6 +78,7 @@ struct sock_mapping {
 #define PVCALLS_STATUS_BIND          1
 #define PVCALLS_STATUS_LISTEN        2
 			uint8_t status;
+			uint8_t pad[7];
 		/*
 		 * Internal state-machine flags.
 		 * Only one accept operation can be inflight for a socket.

             reply	other threads:[~2018-02-27 19:54 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-02-27 19:54 Stefano Stabellini [this message]
2018-02-27 21:19 ` [PATCH] pvcalls-front: 64-bit align flags Boris Ostrovsky
2018-02-27 21:32   ` Stefano Stabellini
2018-02-27 21:32   ` Stefano Stabellini
2018-02-27 21:45     ` Boris Ostrovsky
2018-02-27 21:45     ` Boris Ostrovsky
2018-02-27 21:50       ` Stefano Stabellini
2018-02-27 21:50       ` Stefano Stabellini
2018-02-27 21:19 ` Boris Ostrovsky
2018-02-28  9:06 ` David Laight
2018-02-28  9:06 ` David Laight
2018-02-27 19:54 Stefano Stabellini

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