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authorVinod Koul <vinod.koul@intel.com>2016-01-06 15:17:47 +0530
committerVinod Koul <vinod.koul@intel.com>2016-01-06 15:17:47 +0530
commitd3f1e93ce8e00be19711c35f0c67c54a58aea559 (patch)
tree58010cdfa4fc473fc0693410b4a444755c4438c9 /drivers/dma/virt-dma.h
parent7c7b680fa6b0866af2c4876da261bbfe710315d6 (diff)
parentb1d6ab1aa8cdc23b89bcd578ea8d5e3c501a13d9 (diff)
downloadlinux-d3f1e93ce8e00be19711c35f0c67c54a58aea559.tar.bz2
Merge branch 'topic/async' into for-linus
Diffstat (limited to 'drivers/dma/virt-dma.h')
-rw-r--r--drivers/dma/virt-dma.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/dma/virt-dma.h b/drivers/dma/virt-dma.h
index bff8c39dd716..d9731ca5e262 100644
--- a/drivers/dma/virt-dma.h
+++ b/drivers/dma/virt-dma.h
@@ -163,4 +163,17 @@ static inline void vchan_free_chan_resources(struct virt_dma_chan *vc)
vchan_dma_desc_free_list(vc, &head);
}
+/**
+ * vchan_synchronize() - synchronize callback execution to the current context
+ * @vc: virtual channel to synchronize
+ *
+ * Makes sure that all scheduled or active callbacks have finished running. For
+ * proper operation the caller has to ensure that no new callbacks are scheduled
+ * after the invocation of this function started.
+ */
+static inline void vchan_synchronize(struct virt_dma_chan *vc)
+{
+ tasklet_kill(&vc->task);
+}
+
#endif