Commit 6c2fc9cd authored Oct 26, 2018 by David S. Miller

sparc64: Rework xchg() definition to avoid warnings.



Such as:

fs/ocfs2/file.c: In function ‘ocfs2_file_write_iter’:
./arch/sparc/include/asm/cmpxchg_64.h:55:22: warning: value computed is not used [-Wunused-value]
 #define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))

and

drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c: In function ‘ixgbevf_xdp_setup’:
./arch/sparc/include/asm/cmpxchg_64.h:55:22: warning: value computed is not used [-Wunused-value]
 #define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))

Signed-off-by: David S. Miller <davem@davemloft.net>

parent 2b4792ea

arch/sparc/include/asm/cmpxchg_64.h

+6 −1

Original line number	Diff line number	Diff line
		@@ -52,7 +52,12 @@ static inline unsigned long xchg64(__volatile__ unsigned long *m, unsigned long
		return val;
		}

		#define xchg(ptr,x) ((__typeof__((ptr)))__xchg((unsigned long)(x),(ptr),sizeof((ptr))))
		#define xchg(ptr,x) \
		({ __typeof__(*(ptr)) __ret; \
		__ret = (__typeof__(*(ptr))) \
		__xchg((unsigned long)(x), (ptr), sizeof(*(ptr))); \
		__ret; \
		})

		void __xchg_called_with_bad_pointer(void);