linux-kernel - [PATCH] Add a function to cast error-pointers to a return value

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Message-Id: <1296037074-1585-1-git-send-email-u.kleine-koenig@pengutronix.de>
Date:	Wed, 26 Jan 2011 11:17:54 +0100
From:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
To:	linux-kernel@...r.kernel.org
Cc:	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH] Add a function to cast error-pointers to a return value

Cc: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
---
 include/linux/err.h |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/include/linux/err.h b/include/linux/err.h
index 448afc1..f2edce2 100644
--- a/include/linux/err.h
+++ b/include/linux/err.h
@@ -52,6 +52,14 @@ static inline void * __must_check ERR_CAST(const void *ptr)
 	return (void *) ptr;
 }
 
+static inline int __must_check PTR_RET(const void *ptr)
+{
+	if (IS_ERR(ptr))
+		return PTR_ERR(ptr);
+	else
+		return 0;
+}
+
 #endif
 
 #endif /* _LINUX_ERR_H */
-- 
1.7.2.3

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