The patch titled
err.h: add helper function to simplify pointer error checking
has been added to the -mm tree. Its filename is
errh-add-helper-function-to-simplify-pointer-error-checking.patch
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------------------------------------------------------
Subject: err.h: add helper function to simplify pointer error checking
From: Phil Carmody <ext-phil.2.carmody@xxxxxxxxx>
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.
Signed-off-by: Phil Carmody <ext-phil.2.carmody@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/err.h | 5 +++++
1 file changed, 5 insertions(+)
diff -puN include/linux/err.h~errh-add-helper-function-to-simplify-pointer-error-checking include/linux/err.h
--- a/include/linux/err.h~errh-add-helper-function-to-simplify-pointer-error-checking
+++ a/include/linux/err.h
@@ -34,6 +34,11 @@ static inline long IS_ERR(const void *pt
return IS_ERR_VALUE((unsigned long)ptr);
}
+static inline long IS_ERR_OR_NULL(const void *ptr)
+{
+ return (ptr == NULL) || IS_ERR_VALUE((unsigned long)ptr);
+}
+
/**
* ERR_CAST - Explicitly cast an error-valued pointer to another pointer type
* @ptr: The pointer to cast.
_
Patches currently in -mm which might be from ext-phil.2.carmody@xxxxxxxxx are
errh-add-helper-function-to-simplify-pointer-error-checking.patch
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