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Subject[PATCH v4 1/5] dma-buf/fence-array: add fence_is_array()
Date
From: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

Add helper to check if fence is array.

v2: Comments from Chris Wilson
- remove ternary if from ops comparison
- add EXPORT_SYMBOL(fence_array_ops)

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Christian König <christian.koenig@amd.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Christian König <christian.koenig@amd.com>
---
drivers/dma-buf/fence-array.c | 1 +
include/linux/fence-array.h | 10 ++++++++++
2 files changed, 11 insertions(+)

diff --git a/drivers/dma-buf/fence-array.c b/drivers/dma-buf/fence-array.c
index a8731c8..ee50022 100644
--- a/drivers/dma-buf/fence-array.c
+++ b/drivers/dma-buf/fence-array.c
@@ -99,6 +99,7 @@ const struct fence_ops fence_array_ops = {
.wait = fence_default_wait,
.release = fence_array_release,
};
+EXPORT_SYMBOL(fence_array_ops);

/**
* fence_array_create - Create a custom fence array
diff --git a/include/linux/fence-array.h b/include/linux/fence-array.h
index 86baaa4..a44794e 100644
--- a/include/linux/fence-array.h
+++ b/include/linux/fence-array.h
@@ -52,6 +52,16 @@ struct fence_array {
extern const struct fence_ops fence_array_ops;

/**
+ * fence_is_array - check if a fence is from the array subsclass
+ *
+ * Return true if it is a fence_array and false otherwise.
+ */
+static inline bool fence_is_array(struct fence *fence)
+{
+ return fence->ops == &fence_array_ops;
+}
+
+/**
* to_fence_array - cast a fence to a fence_array
* @fence: fence to cast to a fence_array
*
--
2.5.5
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