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>

diff --git a/tools/include/linux/err.h b/tools/include/linux/err.h
index bdc3dd8131d4eb95cbff12bc9c80e59cd7312704..abf0478a8fb28f0f2621960aae345a504f28fd89 100644 (file)
--- 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 */