Commit c5b19946 authored Jan 12, 2015 by Christian Borntraeger

kernel: Fix sparse warning for ACCESS_ONCE



Commit 927609d6 ("kernel: tighten rules for ACCESS ONCE") results in
sparse warnings like "Using plain integer as NULL pointer" - Let's add a
type cast to the dummy assignment.
To avoid warnings lik "sparse: warning: cast to restricted __hc32" we also
use __force on that cast.

Fixes: 927609d6 ("kernel: tighten rules for ACCESS ONCE")
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>

parent 378af02b

include/linux/compiler.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -461,7 +461,7 @@ static __always_inline void __assign_once_size(volatile void p, void res, int
		* If possible use READ_ONCE/ASSIGN_ONCE instead.
		*/
		#define __ACCESS_ONCE(x) ({ \
		__maybe_unused typeof(x) __var = 0; \
		__maybe_unused typeof(x) __var = (__force typeof(x)) 0; \
		(volatile typeof(x) *)&(x); })
		#define ACCESS_ONCE(x) (*__ACCESS_ONCE(x))