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| author |   Phil Carmody <ext-phil.2.carmody@nokia.com> | 2009-12-14 18:00:29 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-15 08:53:27 -0800 |
| commit | 603c4ba96be998a8dd7a6f9b23681c49acdf4b64 (patch) | |
| tree | 1b85fc526219085ceaffca54150eee64c3aba4a0 /include/linux/err.h | |
| parent | ioc3/ioc4: fix error path on driver registration (diff) | |
| download | linux-dev-603c4ba96be998a8dd7a6f9b23681c49acdf4b64.tar.xz linux-dev-603c4ba96be998a8dd7a6f9b23681c49acdf4b64.zip | |
err.h: add helper function to simplify pointer error checking
There are quite a few instances in the kernel of checks of pointers both
against NULL and against the errno range, handling both cases identically.
This additional helper function would simplify such code.
[akpm@linux-foundation.org: build fix]
Signed-off-by: Phil Carmody <ext-phil.2.carmody@nokia.com>
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 | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/err.h b/include/linux/err.h index ec87f3142bf3..1b12642636c7 100644 --- a/include/linux/err.h +++ b/include/linux/err.h @@ -34,6 +34,11 @@ static inline long IS_ERR(const void *ptr) return IS_ERR_VALUE((unsigned long)ptr); } +static inline long IS_ERR_OR_NULL(const void *ptr) +{ + return !ptr || IS_ERR_VALUE((unsigned long)ptr); +} + /** * ERR_CAST - Explicitly cast an error-valued pointer to another pointer type * @ptr: The pointer to cast. |