linux-kernel - [akpm-mm:mm-unstable 88/100] mm/gup_test.c:302:34: warning: cast to pointer from integer of different size

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Message-ID: <202210182101.XOyPZEQV-lkp@intel.com>
Date:   Tue, 18 Oct 2022 21:55:06 +0800
From:   kernel test robot <lkp@...el.com>
To:     David Hildenbrand <david@...hat.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Memory Management List <linux-mm@...ck.org>
Subject: [akpm-mm:mm-unstable 88/100] mm/gup_test.c:302:34: warning: cast to
 pointer from integer of different size

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-unstable
head:   f5938bbbb79d48ca167e305c228dccbecea0309e
commit: 9bfba5059fed2bc8d3ae797bccec2985e67cf344 [88/100] mm/gup_test: start/stop/read functionality for PIN LONGTERM test
config: arc-randconfig-r043-20221017
compiler: arceb-elf-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://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git/commit/?id=9bfba5059fed2bc8d3ae797bccec2985e67cf344
        git remote add akpm-mm https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git
        git fetch --no-tags akpm-mm mm-unstable
        git checkout 9bfba5059fed2bc8d3ae797bccec2985e67cf344
        # 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=arc SHELL=/bin/bash

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

All warnings (new ones prefixed by >>):

   mm/gup_test.c: In function 'pin_longterm_test_read':
>> mm/gup_test.c:302:34: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
     302 |                 if (copy_to_user((void __user *)user_addr, addr, PAGE_SIZE))
         |                                  ^


vim +302 mm/gup_test.c

   287	
   288	static inline int pin_longterm_test_read(unsigned long arg)
   289	{
   290		__u64 user_addr;
   291		unsigned long i;
   292	
   293		if (!pin_longterm_test_pages)
   294			return -EINVAL;
   295	
   296		if (copy_from_user(&user_addr, (void __user *)arg, sizeof(user_addr)))
   297			return -EFAULT;
   298	
   299		for (i = 0; i < pin_longterm_test_nr_pages; i++) {
   300			void *addr = page_to_virt(pin_longterm_test_pages[i]);
   301	
 > 302			if (copy_to_user((void __user *)user_addr, addr, PAGE_SIZE))
   303				return -EFAULT;
   304			user_addr += PAGE_SIZE;
   305		}
   306		return 0;
   307	}
   308	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp

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