linux-kernel - [PATCH 06/10] staging/android: turn fence_info into a _

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Message-Id: <1454102426-20637-7-git-send-email-gustavo@padovan.org>
Date:	Fri, 29 Jan 2016 19:20:22 -0200
From:	Gustavo Padovan <gustavo@...ovan.org>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	linux-kernel@...r.kernel.org, devel@...verdev.osuosl.org,
	dri-devel@...ts.freedesktop.org,
	Daniel Stone <daniels@...labora.com>,
	Arve Hjønnevåg <arve@...roid.com>,
	Riley Andrews <riandrews@...roid.com>,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	Rob Clark <robdclark@...il.com>,
	Greg Hackmann <ghackmann@...gle.com>,
	John Harrison <John.C.Harrison@...el.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Gustavo Padovan <gustavo.padovan@...labora.co.uk>
Subject: [PATCH 06/10] staging/android: turn fence_info into a __64 pointer

From: Gustavo Padovan <gustavo.padovan@...labora.co.uk>

Making fence_info a pointer enables us to extend the struct in the future
without breaking the ABI.

Signed-off-by: Gustavo Padovan <gustavo.padovan@...labora.co.uk>
---
 drivers/staging/android/sync.c      | 2 +-
 drivers/staging/android/uapi/sync.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/android/sync.c b/drivers/staging/android/sync.c
index f7530f0..51d4f47 100644
--- a/drivers/staging/android/sync.c
+++ b/drivers/staging/android/sync.c
@@ -525,7 +525,7 @@ static long sync_file_ioctl_fence_info(struct sync_file *sync_file,
 	if (info->status >= 0)
 		info->status = !info->status;
 
-	len = sizeof(struct sync_file_info);
+	len = sizeof(struct sync_file_info) - sizeof(__u64 *);
 
 	for (i = 0; i < sync_file->num_fences; ++i) {
 		struct fence *fence = sync_file->cbs[i].fence;
diff --git a/drivers/staging/android/uapi/sync.h b/drivers/staging/android/uapi/sync.h
index ed281fc..9f07aa7 100644
--- a/drivers/staging/android/uapi/sync.h
+++ b/drivers/staging/android/uapi/sync.h
@@ -54,7 +54,7 @@ struct sync_file_info {
 	char	name[32];
 	__s32	status;
 
-	__u8	fence_info[0];
+	__u64	*fence_info;
 };
 
 #define SYNC_IOC_MAGIC		'>'
-- 
2.5.0