[PATCH 2/6] dma-resv: Define guards for context-less dma_resv locks

[Boris Brezillon]

When used without a context, dma_resv are no different from regular
locks. Define guards so we can use the guard-syntactic sugars for
explicit/implicit scoped locks.

Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>
---
 include/linux/dma-resv.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/linux/dma-resv.h b/include/linux/dma-resv.h
index c5ab6fd9ebe8..e559b1811ca3 100644
--- a/include/linux/dma-resv.h
+++ b/include/linux/dma-resv.h
@@ -40,6 +40,7 @@
 #define _LINUX_RESERVATION_H
 
 #include <linux/ww_mutex.h>
+#include <linux/cleanup.h>
 #include <linux/dma-fence.h>
 #include <linux/slab.h>
 #include <linux/seqlock.h>
@@ -484,4 +485,8 @@ void dma_resv_set_deadline(struct dma_resv *obj, enum dma_resv_usage usage,
 bool dma_resv_test_signaled(struct dma_resv *obj, enum dma_resv_usage usage);
 void dma_resv_describe(struct dma_resv *obj, struct seq_file *seq);
 
+DEFINE_GUARD(dma_resv, struct dma_resv *, dma_resv_lock(_T, NULL), dma_resv_unlock(_T));
+DEFINE_GUARD_COND(dma_resv, _intr, dma_resv_lock_interruptible(_T, NULL), !_RET);
+DEFINE_GUARD_COND(dma_resv, _try, dma_resv_trylock(_T));
+
 #endif /* _LINUX_RESERVATION_H */

-- 
2.54.0