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openrisc: xchg: fix `computed is not used` warning 

When building allmodconfig this warning shows.

  fs/ocfs2/file.c: In function 'ocfs2_file_write_iter':
  ./arch/openrisc/include/asm/cmpxchg.h:81:3: warning: value computed is
  not used [-Wunused-value]
    ((typeof(*(ptr)))__xchg((unsigned long)(with), (ptr), sizeof(*(ptr))))
     ^

Applying the same patch logic that was done to the cmpxchg macro.

Signed-off-by: Stafford Horne <shorne@gmail.com>
This commit is contained in:
Stafford Horne 2017-03-13 07:41:55 +09:00
parent 4495c08e84
commit 8af42949d1
1 changed files with 6 additions and 2 deletions
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8
arch/openrisc/include/asm/cmpxchg.h
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@ -77,7 +77,11 @@ static inline unsigned long __xchg(unsigned long val, volatile void *ptr,
return val; return val;
} }
#define xchg(ptr, with) \ #define xchg(ptr, with) \
((typeof(*(ptr)))__xchg((unsigned long)(with), (ptr), sizeof(*(ptr)))) ({ \
(__typeof__(*(ptr))) __xchg((unsigned long)(with), \
(ptr), \
sizeof(*(ptr))); \
})
#endif /* __ASM_OPENRISC_CMPXCHG_H */ #endif /* __ASM_OPENRISC_CMPXCHG_H */