+ include-linux-errh-add-a-function-to-cast-error-pointers-to-a-return-value.patch added to -mm tree

+ include-linux-errh-add-a-function-to-cast-error-pointers-to-a-return-value.patch added to -mm tree

[akpm]

The patch titled
     include/linux/err.h: add a function to cast error-pointers to a return value
has been added to the -mm tree.  Its filename is
     include-linux-errh-add-a-function-to-cast-error-pointers-to-a-return-value.patch

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out what to do about this

The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/

------------------------------------------------------
Subject: include/linux/err.h: add a function to cast error-pointers to a return value
From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

PTR_RET() can be used if you have an error-pointer and are only interested
in the eventual error value, but not the pointer.  Yields the usual 0 for
no error, -ESOMETHING otherwise.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/err.h |    8 ++++++++
 1 file changed, 8 insertions(+)

diff -puN include/linux/err.h~include-linux-errh-add-a-function-to-cast-error-pointers-to-a-return-value include/linux/err.h
--- a/include/linux/err.h~include-linux-errh-add-a-function-to-cast-error-pointers-to-a-return-value
+++ a/include/linux/err.h
@@ -52,6 +52,14 @@ static inline void * __must_check ERR_CA
 	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 */
_

Patches currently in -mm which might be from u.kleine-koenig@pengutronix.de are

origin.patch
linux-next.patch
include-linux-errh-add-a-function-to-cast-error-pointers-to-a-return-value.patch

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