android-5.4/ANDROID-staging-ion-export-ion_free-for-ion_heaps.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Sandeep Patil <sspatil@google.com>
Date: Tue, 10 Sep 2019 05:13:51 -0700
Subject: ANDROID: staging: ion: export ion_free() for ion_heaps.

ion_free() is a generic function needed to release
an ion buffer back to the heap. So, export it for the
heap module.

Bug: 140294230
Test: ion-unit-tests

Change-Id: Iaa467ab3df18fa219412dd9f5913cd022a93455d
Signed-off-by: Sandeep Patil <sspatil@google.com>
---
 drivers/staging/android/ion/ion.c |  1 +
 include/linux/ion.h               | 12 ++++++++++++
 2 files changed, 13 insertions(+)

diff --git a/drivers/staging/android/ion/ion.c b/drivers/staging/android/ion/ion.c
index db1a5850ccb0..68091d17cfb8 100644
--- a/drivers/staging/android/ion/ion.c
+++ b/drivers/staging/android/ion/ion.c
@@ -41,6 +41,7 @@ int ion_free(struct ion_buffer *buffer)
 {
 	return ion_buffer_destroy(internal_dev, buffer);
 }
+EXPORT_SYMBOL_GPL(ion_free);
 
 static int ion_alloc_fd(size_t len, unsigned int heap_id_mask,
 			unsigned int flags)
diff --git a/include/linux/ion.h b/include/linux/ion.h
index 87aa2bcec7d3..88622fb8f9ea 100644
--- a/include/linux/ion.h
+++ b/include/linux/ion.h
@@ -293,6 +293,13 @@ int ion_buffer_zero(struct ion_buffer *buffer);
 struct dma_buf *ion_alloc(size_t len, unsigned int heap_id_mask,
 			  unsigned int flags);
 
+/**
+ * ion_free - Releases the ion buffer.
+ *
+ * @buffer:             ion buffer to be released
+ */
+int ion_free(struct ion_buffer *buffer);
+
 #else
 
 static inline int __ion_device_add_heap(struct ion_heap *heap,
@@ -357,5 +364,10 @@ static inline struct dma_buf *ion_alloc(size_t len, unsigned int heap_id_mask,
 	return ERR_PTR(-ENOMEM);
 }
 
+static inline int ion_free(struct ion_buffer *buffer)
+{
+	return 0;
+}
+
 #endif /* CONFIG_ION */
 #endif /* _ION_KERNEL_H */