[PATCH 01/29] err.h: Add PTR_ERR_OR_ZERO from kernel

[Sascha Hauer]

Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
 include/linux/err.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/linux/err.h b/include/linux/err.h
index 19fb70d..ed563f2 100644
--- a/include/linux/err.h
+++ b/include/linux/err.h
@@ -52,6 +52,14 @@ static inline void *ERR_CAST(const void *ptr)
 	return (void *) 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
 
 #endif /* _LINUX_ERR_H */
-- 
1.9.0