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ia64: fix xchg() warning

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The definition if xchg() causes a harmless warning in some files, like:

In file included from ../arch/ia64/include/uapi/asm/intrinsics.h:22,
                 from ../arch/ia64/include/asm/intrinsics.h:11,
                 from ../arch/ia64/include/asm/bitops.h:19,
                 from ../include/linux/bitops.h:32,
                 from ../include/linux/kernel.h:11,
                 from ../fs/nfs/read.c:12:
../fs/nfs/read.c: In function 'nfs_read_completion':
../arch/ia64/include/uapi/asm/cmpxchg.h:57:2: warning: value computed is not used [-Wunused-value]
   57 | ((__typeof__(*(ptr))) __xchg((unsigned long) (x), (ptr), sizeof(*(ptr))))
      | ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../fs/nfs/read.c:196:5: note: in expansion of macro 'xchg'
  196 |     xchg(&nfs_req_openctx(req)->error, error);
      |     ^~~~

Change it to a compound expression like the other architectures have
to get a clean defconfig build.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann 2021-01-04 09:52:48 +01:00
parent 796130b1de
commit 968d7764e3
1 changed files with 1 additions and 1 deletions
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2
arch/ia64/include/uapi/asm/cmpxchg.h
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@ -54,7 +54,7 @@ extern void ia64_xchg_called_with_bad_pointer(void);
})
#define xchg(ptr, x) \
((__typeof__(*(ptr))) __xchg((unsigned long) (x), (ptr), sizeof(*(ptr))))
({(__typeof__(*(ptr))) __xchg((unsigned long) (x), (ptr), sizeof(*(ptr)));})
/*
* Atomic compare and exchange. Compare OLD with MEM, if identical,