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authorStefan Agner <stefan@agner.ch>2018-05-08 22:51:50 +0100
committerRussell King <rmk+kernel@armlinux.org.uk>2018-05-19 11:53:46 +0100
commitdb4667a800175ede09d80fbd391c2578541121dd (patch)
treef728cf0b270ef6fcbc286d3ddc644a8d2be798e9 /drivers/amba
parentARM: 8767/1: add support for building ARM kernel with clang (diff)
downloadlinux-dev-db4667a800175ede09d80fbd391c2578541121dd.tar.xz
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ARM: 8768/1: uaccess: remove const to avoid duplicate specifier
Some users of get_user use the macro with an argument p which is already specified as static. When using clang this leads to a duplicate specifier: CC arch/arm/kernel/process.o In file included from init/do_mounts.c:15: In file included from ./include/linux/tty.h:7: In file included from ./include/uapi/linux/termios.h:6: In file included from ./arch/arm/include/generated/uapi/asm/termios.h:1: ./include/asm-generic/termios.h:25:6: warning: duplicate 'const' declaration specifier [-Wduplicate-decl-specifier] if (get_user(tmp, &termio->c_iflag) < 0) ^ ./arch/arm/include/asm/uaccess.h:195:3: note: expanded from macro 'get_user' __get_user_check(x, p); ^ ./arch/arm/include/asm/uaccess.h:155:12: note: expanded from macro '__get_user_check' register const typeof(*(p)) __user *__p asm("r0") = (p); Remove the const attribute from the register declaration to avoid the duplicate const specifier. In a test with ptrace.c and traps.c (both using get_user with non-const arguments for p) the generated code was exactly the same. Signed-off-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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