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[122.58.178.240]) by smtp.gmail.com with ESMTPSA id gm11sm3358976pjb.26.2020.05.30.15.45.37 (version=TLS1 cipher=AES128-SHA bits=128/128); Sat, 30 May 2020 15:45:38 -0700 (PDT) Received: by xplor.waratah.dyndns.org (Postfix, from userid 1000) id EF23F360079; Sun, 31 May 2020 10:45:33 +1200 (NZST) From: Michael Schmitz To: geert@linux-m68k.org Cc: linux-m68k@vger.kernel.org, Michael Schmitz Subject: [PATCH] m68k - annotate dummy read in Atari ROM port IO code as __maybe_unused Date: Sun, 31 May 2020 10:45:19 +1200 Message-Id: <1590878719-21219-1-git-send-email-schmitzmic@gmail.com> X-Mailer: git-send-email 1.7.0.4 Sender: linux-m68k-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-m68k@vger.kernel.org The Atari ROM port IO code uses dummy variables to implement writes (not supported by the hardware) as reads that encode the write data in part of the address. The value read from the ROM port in this operation is discarded. Annotate dummy variables as __maybe_unused to avoid a compiler warning. Signed-off-by: Michael Schmitz Reported-by: kbuild test robot --- arch/m68k/include/asm/raw_io.h | 6 +++--- 1 files changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/m68k/include/asm/raw_io.h b/arch/m68k/include/asm/raw_io.h index 8a6dc6e..911826e 100644 --- a/arch/m68k/include/asm/raw_io.h +++ b/arch/m68k/include/asm/raw_io.h @@ -80,14 +80,14 @@ ({ u16 __v = le16_to_cpu(*(__force volatile u16 *) (addr)); __v; }) #define rom_out_8(addr, b) \ - ({u8 __w, __v = (b); u32 _addr = ((u32) (addr)); \ + ({u8 __maybe_unused __w, __v = (b); u32 _addr = ((u32) (addr)); \ __w = ((*(__force volatile u8 *) ((_addr | 0x10000) + (__v<<1)))); }) #define rom_out_be16(addr, w) \ - ({u16 __w, __v = (w); u32 _addr = ((u32) (addr)); \ + ({u16 __maybe_unused __w, __v = (w); u32 _addr = ((u32) (addr)); \ __w = ((*(__force volatile u16 *) ((_addr & 0xFFFF0000UL) + ((__v & 0xFF)<<1)))); \ __w = ((*(__force volatile u16 *) ((_addr | 0x10000) + ((__v >> 8)<<1)))); }) #define rom_out_le16(addr, w) \ - ({u16 __w, __v = (w); u32 _addr = ((u32) (addr)); \ + ({u16 __maybe_unused __w, __v = (w); u32 _addr = ((u32) (addr)); \ __w = ((*(__force volatile u16 *) ((_addr & 0xFFFF0000UL) + ((__v >> 8)<<1)))); \ __w = ((*(__force volatile u16 *) ((_addr | 0x10000) + ((__v & 0xFF)<<1)))); }) -- 1.7.0.4