From: Geert Uytterhoeven <geert@linux-m68k.org> stable inclusion from stable-v5.10.121 commit 6c18a0fcd6605c208888d539208fc54c2b4bada1 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I5L6CQ Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- [ Upstream commit 30b5e6ef4a32ea4985b99200e06d6660a69f9246 ] The macros implementing Atari ROM port I/O writes do not cast away their output, unlike similar implementations for other I/O buses. When they are combined using conditional expressions in the definitions of outb() and friends, this triggers sparse warnings like: drivers/net/appletalk/cops.c:382:17: error: incompatible types in conditional expression (different base types): drivers/net/appletalk/cops.c:382:17: unsigned char drivers/net/appletalk/cops.c:382:17: void Fix this by adding casts to "void". Reported-by: kernel test robot <lkp@intel.com> Reported-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Michael Schmitz <schmitzmic@gmail.com> Link: https://lore.kernel.org/r/c15bedc83d90a14fffcd5b1b6bfb32b8a80282c5.165305709... Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com> Acked-by: Xie XiuQi <xiexiuqi@huawei.com> --- arch/m68k/include/asm/raw_io.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/m68k/include/asm/raw_io.h b/arch/m68k/include/asm/raw_io.h index 80eb2396d01e..3ba40bc1dfaa 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 __maybe_unused __w, __v = (b); u32 _addr = ((u32) (addr)); \ + (void)({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 __maybe_unused __w, __v = (w); u32 _addr = ((u32) (addr)); \ + (void)({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 __maybe_unused __w, __v = (w); u32 _addr = ((u32) (addr)); \ + (void)({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)))); }) -- 2.20.1