linux-kernel - [PATCH 2/3] DRM: don't cast a pointer to pointer of list

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Message-ID: <4757C257.6060003@cn.fujitsu.com>
Date:	Thu, 06 Dec 2007 17:35:19 +0800
From:	Li Zefan <lizf@...fujitsu.com>
To:	airlied@...ux.ie
CC:	dri-devel@...ts.sourceforge.net,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH 2/3] DRM: don't cast a pointer to pointer of list_head


The casting is safe only when the list_head member is the
first member of the structure.

Signed-off-by: Li Zefan <lizf@...fujitsu.com>

---
 drivers/char/drm/i915_irq.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/char/drm/i915_irq.c b/drivers/char/drm/i915_irq.c
index a443f4a..e9e8522 100644
--- a/drivers/char/drm/i915_irq.c
+++ b/drivers/char/drm/i915_irq.c
@@ -555,7 +555,7 @@ int i915_vblank_swap(struct drm_device *dev, void *data,
 
 	spin_lock_irqsave(&dev_priv->swaps_lock, irqflags);
 
-	list_add_tail((struct list_head *)vbl_swap, &dev_priv->vbl_swaps.head);
+	list_add_tail(&vbl_swap->head, &dev_priv->vbl_swaps.head);
 	dev_priv->swaps_pending++;
 
 	spin_unlock_irqrestore(&dev_priv->swaps_lock, irqflags);
-- 
1.5.3.rc7

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