Hi Anand,

[auto build test WARNING on btrfs/next]
[cannot apply to v4.8-rc6 next-20160913]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
[Suggest to use git(>=2.9.0) format-patch --base=<commit> (or --base=auto for convenience) to record what (public, well-known) commit your patch series was built on]
[Check https://git-scm.com/docs/git-format-patch for more information]

url:    https://github.com/0day-ci/linux/commits/Anand-Jain/btrfs-Encryption-Add-btrfs-encryption-support/20160913-214237
base:   https://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs.git next
config: i386-allmodconfig (attached as .config)
compiler: gcc-6 (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

   fs/btrfs/tests/crypto-tests.c: In function 'test_print_data':
>> fs/btrfs/tests/crypto-tests.c:110:28: warning: format '%lu' expects argument of type 'long unsigned int', but argument 3 has type 'size_t {aka unsigned int}' [-Wformat=]
     printk("_BTRFS_: %s: sz %lu: ", prefix, sz);
                               ^
   fs/btrfs/tests/crypto-tests.c: In function 'test_ablkciphear2':
   fs/btrfs/tests/crypto-tests.c:314:44: warning: format '%lu' expects argument of type 'long unsigned int', but argument 3 has type 'size_t {aka unsigned int}' [-Wformat=]
      printk("BTRFS_TEST: Encrypt '%s' size '%lu' Failed\n",
                                               ^
   fs/btrfs/tests/crypto-tests.c:324:44: warning: format '%lu' expects argument of type 'long unsigned int', but argument 3 has type 'size_t {aka unsigned int}' [-Wformat=]
      printk("BTRFS_TEST: Decrypt '%s' size '%lu' Failed\n",
                                               ^

vim +110 fs/btrfs/tests/crypto-tests.c

    94		for (offset = 0; offset < TEST_DATA_SIZE; offset = offset + dlen)
    95			memcpy(kaddr + offset, str, dlen);
    96	
    97		flush_kernel_dcache_page(known_data_page);
    98	}
    99	
   100	void test_fini(void)
   101	{
   102		if (known_data_page)
   103			__free_page(known_data_page);
   104	}
   105	
   106	
   107	void test_print_data(const char *str, char *prefix, size_t sz, int print_as_str)
   108	{
   109		int i;
 > 110		printk("_BTRFS_: %s: sz %lu: ", prefix, sz);
   111	
   112		if (print_as_str)
   113			for (i = 0; i < sz; i++) printk("%c", str[i]);
   114		else
   115			for (i = 0; i < sz; i++) printk("%02x ", 0xF & str[i]);
   116	
   117		printk("\n");
   118	}

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