diff options
| 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 | |
| parent | 9385565e20c4acf97cd8e2fd7155750e578edcc4 (diff) | |
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>
| -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 ec87f3142bf..1b12642636c 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. |