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[PATCH v2 4/4] Documentation: add doc for sync_file_get_fence()

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

Document the new function added to sync_file.c

v2: Adapt to fence_array

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
---
 Documentation/sync_file.txt | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/Documentation/sync_file.txt b/Documentation/sync_file.txt
index e8e2eba..ae2dbad1 100644
--- a/Documentation/sync_file.txt
+++ b/Documentation/sync_file.txt
@@ -64,6 +64,21 @@ The sync_file fd now can be sent to userspace.
 If the creation process fail, or the sync_file needs to be released by any
 other reason fput(sync_file->file) should be used.
 
+Receiving Sync Files from Userspace
+-----------------------------------
+
+When userspace needs to send an in-fence to the driver it pass file descriptor
+of the Sync File to the kernel. The kernel then can retrieve the fences
+from it.
+
+Interface:
+	struct fence *sync_file_get_fence(int fd);
+
+
+The function return a struct fence pointer referencing the fence(s) in the Sync
+File.
+
+
 References:
 [1] struct sync_file in include/linux/sync_file.h
 [2] All interfaces mentioned above defined in include/linux/sync_file.h
-- 
2.5.5

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[PATCH v2 0/4] dma-buf/sync_file: rework fences on struct sync_file Gustavo Padovan <gustavo@padovan.org> - 2016-07-01 15:10 +0200
  [PATCH v2 1/4] dma-buf/fence-array: add fence_is_array() Gustavo Padovan <gustavo@padovan.org> - 2016-07-01 15:10 +0200
  [PATCH v2 4/4] Documentation: add doc for sync_file_get_fence() Gustavo Padovan <gustavo@padovan.org> - 2016-07-01 15:10 +0200
  [PATCH v2 2/4] dma-buf/sync_file: rework fence storage in struct file Gustavo Padovan <gustavo@padovan.org> - 2016-07-01 15:10 +0200
    Re: [PATCH v2 2/4] dma-buf/sync_file: rework fence storage in struct  file Chris Wilson <chris@chris-wilson.co.uk> - 2016-07-01 15:30 +0200

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