Re: [PATCH net] device property: change device_get_phy_mode() to prevent signedess bugs

[kbuild test robot]

Hi Dan,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on net/master]
[also build test WARNING on driver-core/driver-core-testing linus/master v5.5 next-20200131]
[cannot apply to sparc-next/master]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Dan-Carpenter/device-property-change-device_get_phy_mode-to-prevent-signedess-bugs/20200203-043126
base:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git b7c3a17c6062701d97a0959890a2c882bfaac537
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.1-154-g1dc00f87-dirty
        make ARCH=x86_64 allmodconfig
        make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@xxxxxxxxx>


sparse warnings: (new ones prefixed by >>)

   arch/x86/boot/compressed/cmdline.c:5:20: sparse: sparse: multiple definitions for function 'set_fs'
>> arch/x86/include/asm/uaccess.h:29:20: sparse:  the previous one is here
   arch/x86/boot/compressed/../cmdline.c:28:5: sparse: sparse: symbol '__cmdline_find_option' was not declared. Should it be static?
   arch/x86/boot/compressed/../cmdline.c:100:5: sparse: sparse: symbol '__cmdline_find_option_bool' was not declared. Should it be static?

vim +29 arch/x86/include/asm/uaccess.h

ca23386216b9d4 include/asm-x86/uaccess.h      Glauber Costa   2008-06-13  27  
13d4ea097d18b4 arch/x86/include/asm/uaccess.h Andy Lutomirski 2016-07-14  28  #define get_fs()	(current->thread.addr_limit)
5ea0727b163cb5 arch/x86/include/asm/uaccess.h Thomas Garnier  2017-06-14 @29  static inline void set_fs(mm_segment_t fs)
5ea0727b163cb5 arch/x86/include/asm/uaccess.h Thomas Garnier  2017-06-14  30  {
5ea0727b163cb5 arch/x86/include/asm/uaccess.h Thomas Garnier  2017-06-14  31  	current->thread.addr_limit = fs;
5ea0727b163cb5 arch/x86/include/asm/uaccess.h Thomas Garnier  2017-06-14  32  	/* On user-mode return, check fs is correct */
5ea0727b163cb5 arch/x86/include/asm/uaccess.h Thomas Garnier  2017-06-14  33  	set_thread_flag(TIF_FSCHECK);
5ea0727b163cb5 arch/x86/include/asm/uaccess.h Thomas Garnier  2017-06-14  34  }
ca23386216b9d4 include/asm-x86/uaccess.h      Glauber Costa   2008-06-13  35  

:::::: The code at line 29 was first introduced by commit
:::::: 5ea0727b163cb5575e36397a12eade68a1f35f24 x86/syscalls: Check address limit on user-mode return

:::::: TO: Thomas Garnier <thgarnie@xxxxxxxxxx>
:::::: CC: Thomas Gleixner <tglx@xxxxxxxxxxxxx>

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