Hi Hao,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on f9ff5644bcc04221bae56f922122f2b7f5d24d62]

url:    https://github.com/intel-lab-lkp/linux/commits/Hao-Sun/mm-new-primitive-kvmemdup/20221219-122348
base:   f9ff5644bcc04221bae56f922122f2b7f5d24d62
patch link:    https://lore.kernel.org/r/20221219042126.3396-1-sunhao.th%40gmail.com
patch subject: [PATCH] mm: new primitive kvmemdup()
config: sh-allmodconfig
compiler: sh4-linux-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel-lab-lkp/linux/commit/29c8ee8f5f8fcd8f52aa6912bdb55f3dc135b5a0
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Hao-Sun/mm-new-primitive-kvmemdup/20221219-122348
        git checkout 29c8ee8f5f8fcd8f52aa6912bdb55f3dc135b5a0
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=sh olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=sh SHELL=/bin/bash security/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

>> security/apparmor/policy_unpack.c:164:14: error: conflicting types for 'kvmemdup'; have 'void *(const void *, size_t)' {aka 'void *(const void *, unsigned int)'}
     164 | static void *kvmemdup(const void *src, size_t len)
         |              ^~~~~~~~
   In file included from include/linux/bitmap.h:11,
                    from include/linux/cpumask.h:12,
                    from include/linux/smp.h:13,
                    from include/linux/lockdep.h:14,
                    from include/linux/rcupdate.h:29,
                    from include/linux/rculist.h:11,
                    from include/linux/pid.h:5,
                    from include/linux/sched.h:14,
                    from include/linux/audit.h:12,
                    from security/apparmor/include/audit.h:14,
                    from security/apparmor/policy_unpack.c:23:
   include/linux/string.h:180:14: note: previous declaration of 'kvmemdup' with type 'void *(const void *, size_t,  gfp_t)' {aka 'void *(const void *, unsigned int,  unsigned int)'}
     180 | extern void *kvmemdup(const void *src, size_t len, gfp_t gfp) __realloc_size(2);
         |              ^~~~~~~~


vim +164 security/apparmor/policy_unpack.c

736ec752d95e91 John Johansen   2010-07-29  163  
8e51f9087f4024 Matthew Garrett 2018-02-08 @164  static void *kvmemdup(const void *src, size_t len)
8e51f9087f4024 Matthew Garrett 2018-02-08  165  {
8e51f9087f4024 Matthew Garrett 2018-02-08  166  	void *p = kvmalloc(len, GFP_KERNEL);
8e51f9087f4024 Matthew Garrett 2018-02-08  167  
8e51f9087f4024 Matthew Garrett 2018-02-08  168  	if (p)
8e51f9087f4024 Matthew Garrett 2018-02-08  169  		memcpy(p, src, len);
8e51f9087f4024 Matthew Garrett 2018-02-08  170  	return p;
8e51f9087f4024 Matthew Garrett 2018-02-08  171  }
8e51f9087f4024 Matthew Garrett 2018-02-08  172  

-- 
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