+ errh-add-helper-function-to-simplify-pointer-error-checking.patch added to -mm tree

+ errh-add-helper-function-to-simplify-pointer-error-checking.patch added to -mm tree

[akpm]

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@nokia.com>

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@nokia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 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@nokia.com are

errh-add-helper-function-to-simplify-pointer-error-checking.patch