Commit 603c4ba96be998a8dd7a6f9b23681c49acdf4b64
Committed by
Linus Torvalds
1 parent
9385565e20
Exists in
master
and in
39 other branches
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>
Showing 1 changed file with 5 additions and 0 deletions Side-by-side Diff
include/linux/err.h
... | ... | @@ -34,6 +34,11 @@ |
34 | 34 | return IS_ERR_VALUE((unsigned long)ptr); |
35 | 35 | } |
36 | 36 | |
37 | +static inline long IS_ERR_OR_NULL(const void *ptr) | |
38 | +{ | |
39 | + return !ptr || IS_ERR_VALUE((unsigned long)ptr); | |
40 | +} | |
41 | + | |
37 | 42 | /** |
38 | 43 | * ERR_CAST - Explicitly cast an error-valued pointer to another pointer type |
39 | 44 | * @ptr: The pointer to cast. |