[tip:locking/core] tools/include: Add IS_ERR_OR_NULL to err.h

["tip-bot for Levin, Alexander (Sasha Levin)" <tipbot@zytor.com>]

Commit-ID:  61d4595eed163ea416c13c4b994f22190711151b
Gitweb:     http://git.kernel.org/tip/61d4595eed163ea416c13c4b994f22190711151b
Author:     Levin, Alexander (Sasha Levin) <alexander.levin@verizon.com>
AuthorDate: Thu, 25 May 2017 12:58:56 +0000
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Mon, 5 Jun 2017 09:28:12 +0200

tools/include: Add IS_ERR_OR_NULL to err.h

Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: a.p.zijlstra@chello.nl
Cc: ben@decadent.org.uk
Link: http://lkml.kernel.org/r/20170525130005.5947-20-alexander.levin@verizon.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 tools/include/linux/err.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/include/linux/err.h b/tools/include/linux/err.h
index bdc3dd8..abf0478 100644
--- a/tools/include/linux/err.h
+++ b/tools/include/linux/err.h
@@ -46,4 +46,9 @@ static inline bool __must_check IS_ERR(__force const void *ptr)
 	return IS_ERR_VALUE((unsigned long)ptr);
 }
 
+static inline bool __must_check IS_ERR_OR_NULL(__force const void *ptr)
+{
+	return unlikely(!ptr) || IS_ERR_VALUE((unsigned long)ptr);
+}
+
 #endif /* _LINUX_ERR_H */