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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------------------------------------------------------
Subject: include/linux/err.h: add a function to cast error-pointers to a return value
From: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
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@xxxxxxxxxxxxxx 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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