linux-kernel - arch/mips/include/asm/mach-cavium-octeon/mangle-port.h:19:40: error: right shift count >= width of type

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <201609041354.WlR6d2az%fengguang.wu@intel.com>
Date:   Sun, 4 Sep 2016 13:13:58 +0800
From:   kbuild test robot <fengguang.wu@...el.com>
To:     "Steven J. Hill" <Steven.Hill@...tec.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        Ralf Baechle <ralf@...ux-mips.org>
Subject: arch/mips/include/asm/mach-cavium-octeon/mangle-port.h:19:40: error:
 right shift count >= width of type

Hi Steven,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   28e68154c5e2793123b248d38cf17b34dcb16d87
commit: 1685ddbe35cd4637f7f841d5f9755dd0470bd68d MIPS: Octeon: Changes to support readq()/writeq() usage.
date:   8 weeks ago
config: mips-cavium_octeon_defconfig (attached as .config)
compiler: mips64-linux-gnuabi64-gcc (Debian 5.4.0-6) 5.4.0 20160609
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 1685ddbe35cd4637f7f841d5f9755dd0470bd68d
        # save the attached .config to linux build tree
        make.cross ARCH=mips 

All errors (new ones prefixed by >>):

   In file included from arch/mips/include/asm/io.h:32:0,
                    from arch/mips/include/asm/page.h:176,
                    from arch/mips/vdso/vdso.h:26,
                    from arch/mips/vdso/gettimeofday.c:11:
   arch/mips/include/asm/mach-cavium-octeon/mangle-port.h: In function '__should_swizzle_bits':
>> arch/mips/include/asm/mach-cavium-octeon/mangle-port.h:19:40: error: right shift count >= width of type [-Werror=shift-count-overflow]
     unsigned long did = ((unsigned long)a >> 40) & 0xff;
                                           ^
   cc1: all warnings being treated as errors

vim +19 arch/mips/include/asm/mach-cavium-octeon/mangle-port.h

    13	#ifdef __BIG_ENDIAN
    14	
    15	static inline bool __should_swizzle_bits(volatile void *a)
    16	{
    17		extern const bool octeon_should_swizzle_table[];
    18	
  > 19		unsigned long did = ((unsigned long)a >> 40) & 0xff;
    20		return octeon_should_swizzle_table[did];
    21	}
    22	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

Download attachment ".config.gz" of type "application/octet-stream" (15392 bytes)