[PATCH 1/2] tools: include: Add PTR_ERR_OR_ZERO to err.h

[Ding Xiang]

Add PTR_ERR_OR_ZERO, and tools can use it.

Signed-off-by: Ding Xiang <dingxiang@xxxxxxxxxxxxxxxxxxxx>
---
 tools/include/linux/err.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/tools/include/linux/err.h b/tools/include/linux/err.h
index 7a8b61a..0946496 100644
--- a/tools/include/linux/err.h
+++ b/tools/include/linux/err.h
@@ -52,4 +52,11 @@ static inline bool __must_check IS_ERR_OR_NULL(__force const void *ptr)
 	return unlikely(!ptr) || IS_ERR_VALUE((unsigned long)ptr);
 }
 
+static inline int __must_check PTR_ERR_OR_ZERO(__force const void *ptr)
+{
+	if (IS_ERR(ptr))
+		return PTR_ERR(ptr);
+	else
+		return 0;
+}
 #endif /* _LINUX_ERR_H */
-- 
1.9.1