From: Arnd Bergmann <arnd@kernel.org> To: Tony Luck <tony.luck@intel.com>, Fenghua Yu <fenghua.yu@intel.com> Cc: Arnd Bergmann <arnd@arndb.de>, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] ia64: fix xchg() warning Date: Mon, 4 Jan 2021 09:58:02 +0100 [thread overview] Message-ID: <20210104085806.4176886-1-arnd@kernel.org> (raw) From: Arnd Bergmann <arnd@arndb.de> 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> --- arch/ia64/include/uapi/asm/cmpxchg.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/ia64/include/uapi/asm/cmpxchg.h b/arch/ia64/include/uapi/asm/cmpxchg.h index d69c979936d4..5d90307fd6e0 100644 --- a/arch/ia64/include/uapi/asm/cmpxchg.h +++ b/arch/ia64/include/uapi/asm/cmpxchg.h @@ -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, -- 2.29.2
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From: Arnd Bergmann <arnd@kernel.org> To: Tony Luck <tony.luck@intel.com>, Fenghua Yu <fenghua.yu@intel.com> Cc: Arnd Bergmann <arnd@arndb.de>, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] ia64: fix xchg() warning Date: Mon, 04 Jan 2021 08:58:02 +0000 [thread overview] Message-ID: <20210104085806.4176886-1-arnd@kernel.org> (raw) From: Arnd Bergmann <arnd@arndb.de> 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> --- arch/ia64/include/uapi/asm/cmpxchg.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/ia64/include/uapi/asm/cmpxchg.h b/arch/ia64/include/uapi/asm/cmpxchg.h index d69c979936d4..5d90307fd6e0 100644 --- a/arch/ia64/include/uapi/asm/cmpxchg.h +++ b/arch/ia64/include/uapi/asm/cmpxchg.h @@ -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, -- 2.29.2
next reply other threads:[~2021-01-04 8:58 UTC|newest] Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-01-04 8:58 Arnd Bergmann [this message] 2021-01-04 8:58 ` [PATCH] ia64: fix xchg() warning Arnd Bergmann 2021-01-04 9:06 ` John Paul Adrian Glaubitz 2021-01-04 9:06 ` John Paul Adrian Glaubitz 2021-01-04 9:32 ` Arnd Bergmann 2021-01-04 9:32 ` Arnd Bergmann 2021-01-04 16:00 ` Luck, Tony 2021-01-04 16:00 ` Luck, Tony 2021-01-05 13:17 ` Arnd Bergmann 2021-01-05 13:17 ` Arnd Bergmann 2021-01-05 15:36 ` Luck, Tony 2021-01-05 15:36 ` Luck, Tony 2021-01-06 10:46 ` John Paul Adrian Glaubitz 2021-01-06 10:46 ` John Paul Adrian Glaubitz
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