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authorUwe Kleine-König <u.kleine-koenig@pengutronix.de>2011-03-22 16:34:05 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-22 17:44:11 -0700
commitfa9ee9c4b9885dfdf8eccac19b8b4fc8a7c53288 (patch)
tree7fa3808a38b2d8f161d750156804e643288e4304
parentd404ab0a1133e95557bb7deab2a49b348dfeba85 (diff)
downloadlinux-fa9ee9c4b9885dfdf8eccac19b8b4fc8a7c53288.tar.bz2
include/linux/err.h: add a function to cast error-pointers to a return value
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> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--include/linux/err.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/err.h b/include/linux/err.h
index 448afc12c78a..f2edce25a76b 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 */