This is a note to let you know that I've just added the patch titled
dma-buf/dma-fence: Extract __dma_fence_is_later()
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
dma-buf-dma-fence-extract-__dma_fence_is_later.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 8111477663813caa1a4469cfe6afaae36cd04513 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Date: Thu, 29 Jun 2017 13:59:24 +0100
Subject: dma-buf/dma-fence: Extract __dma_fence_is_later()
From: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
commit 8111477663813caa1a4469cfe6afaae36cd04513 upstream.
Often we have the task of comparing two seqno known to be on the same
context, so provide a common __dma_fence_is_later().
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Sumit Semwal <sumit.semwal@xxxxxxxxxx>
Cc: Sean Paul <seanpaul@xxxxxxxxxxxx>
Cc: Gustavo Padovan <gustavo@xxxxxxxxxxx>
Reviewed-by: Sean Paul <seanpaul@xxxxxxxxxxxx>
Signed-off-by: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxx>
Link: http://patchwork.freedesktop.org/patch/msgid/20170629125930.821-1-chris@xxxxxxxxxxxxxxxxxx
[renamed to __fence_is_later() - gregkh]
Cc: Jisheng Zhang <Jisheng.Zhang@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
include/linux/fence.h | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
--- a/include/linux/fence.h
+++ b/include/linux/fence.h
@@ -281,6 +281,19 @@ fence_is_signaled(struct fence *fence)
}
/**
+ * __fence_is_later - return if f1 is chronologically later than f2
+ * @f1: [in] the first fence's seqno
+ * @f2: [in] the second fence's seqno from the same context
+ *
+ * Returns true if f1 is chronologically later than f2. Both fences must be
+ * from the same context, since a seqno is not common across contexts.
+ */
+static inline bool __fence_is_later(u32 f1, u32 f2)
+{
+ return (int)(f1 - f2) > 0;
+}
+
+/**
* fence_is_later - return if f1 is chronologically later than f2
* @f1: [in] the first fence from the same context
* @f2: [in] the second fence from the same context
@@ -293,7 +306,7 @@ static inline bool fence_is_later(struct
if (WARN_ON(f1->context != f2->context))
return false;
- return (int)(f1->seqno - f2->seqno) > 0;
+ return __fence_is_later(f1->seqno, f2->seqno);
}
/**
Patches currently in stable-queue which might be from chris@xxxxxxxxxxxxxxxxxx are
queue-4.9/dma-buf-sw-sync-fix-the-is-signaled-test-to-handle-u32-wraparound.patch
queue-4.9/dma-fence-clear-fence-status-during-dma_fence_init.patch
queue-4.9/dma-buf-sw-sync-fix-locking-around-sync_timeline-lists.patch
queue-4.9/dma-fence-wrap-querying-the-fence-status.patch
queue-4.9/dma-buf-sw_sync-clean-up-list-before-signaling-the-fence.patch
queue-4.9/dma-buf-sw-sync-reduce-irqsave-irqrestore-from-known-context.patch
queue-4.9/dma-buf-sw_sync-move-timeline_fence_ops-around.patch
queue-4.9/dma-buf-sw-sync-prevent-user-overflow-on-timeline-advance.patch
queue-4.9/dma-fence-introduce-drm_fence_set_error-helper.patch
queue-4.9/dma-buf-sw_sync-force-signal-all-unsignaled-fences-on-dying-timeline.patch
queue-4.9/dma-buf-sw-sync-use-an-rbtree-to-sort-fences-in-the-timeline.patch
queue-4.9/dma-buf-sw-sync-sync_pt-is-private-and-of-fixed-size.patch
queue-4.9/dma-buf-dma-fence-extract-__dma_fence_is_later.patch