Commit 4fe3997a authored by Chris Wilson's avatar Chris Wilson
Browse files

dma-fence: Shrink size of struct dma_fence 



Rearrange the couple of 32-bit atomics hidden amongst the field of
pointers that unnecessarily caused the compiler to insert some padding,
shrinks the size of the base struct dma_fence from 80 to 72 bytes on
x86-64.

Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Cc: Christian König <christian.koenig@amd.com>
Reviewed-by: default avatarChristian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190817144736.7826-3-chris@chris-wilson.co.uk
parent b0baf85b

include/linux/dma-fence.h

+3 −3
Original line number Diff line number Diff line
@@ -63,7 +63,7 @@ struct dma_fence_cb; 
 * been completed, or never called at all.

 */

struct dma_fence {

	struct kref refcount;

	spinlock_t *lock;

	const struct dma_fence_ops *ops;

	/* We clear the callback list on kref_put so that by the time we

	 * release the fence it is unused. No one should be adding to the cb_list
@@ -73,11 +73,11 @@ struct dma_fence { 
		struct rcu_head rcu;

		struct list_head cb_list;

	};

	spinlock_t *lock;

	u64 context;

	u64 seqno;

	unsigned long flags;

	ktime_t timestamp;

	unsigned long flags;

	struct kref refcount;

	int error;

};

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