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| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2011-03-22 16:34:05 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-03-22 17:44:11 -0700 |
| commit | fa9ee9c4b9885dfdf8eccac19b8b4fc8a7c53288 (patch) | |
| tree | 7fa3808a38b2d8f161d750156804e643288e4304 /include/linux/err.h | |
| parent | d404ab0a1133e95557bb7deab2a49b348dfeba85 (diff) | |
| download | lwn-fa9ee9c4b9885dfdf8eccac19b8b4fc8a7c53288.tar.gz lwn-fa9ee9c4b9885dfdf8eccac19b8b4fc8a7c53288.zip | |
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>
Diffstat (limited to 'include/linux/err.h')
| -rw-r--r-- | 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 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 */ |