linux-kernel - Re: [PATCH v3 3/3] random: use siphash24 instead of md5 for get_random

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Message-ID: <201612150509.iV2Vrv7w%fengguang.wu@intel.com>
Date:   Thu, 15 Dec 2016 05:56:28 +0800
From:   kbuild test robot <lkp@...el.com>
To:     "Jason A. Donenfeld" <Jason@...c4.com>
Cc:     kbuild-all@...org, Netdev <netdev@...r.kernel.org>,
        kernel-hardening@...ts.openwall.com,
        LKML <linux-kernel@...r.kernel.org>,
        linux-crypto@...r.kernel.org,
        "Jason A. Donenfeld" <Jason@...c4.com>,
        Jean-Philippe Aumasson <jeanphilippe.aumasson@...il.com>,
        Ted Tso <tytso@....edu>
Subject: Re: [PATCH v3 3/3] random: use siphash24 instead of md5 for
 get_random_int/long

Hi Jason,

[auto build test ERROR on linus/master]
[also build test ERROR on next-20161214]
[cannot apply to v4.9]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Jason-A-Donenfeld/siphash-add-cryptographically-secure-hashtable-function/20161215-041458
config: i386-randconfig-i1-201650 (attached as .config)
compiler: gcc-4.8 (Debian 4.8.4-1) 4.8.4
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

>> drivers/char/random.c:2046:1: error: requested alignment is not an integer constant
    static u8 random_int_secret[SIPHASH24_KEY_LEN] __aligned(SIPHASH24_ALIGNMENT);
    ^
   drivers/char/random.c: In function 'get_random_int':
   drivers/char/random.c:2071:2: error: requested alignment is not an integer constant
     } __aligned(SIPHASH24_ALIGNMENT) combined;
     ^
   drivers/char/random.c: In function 'get_random_long':
   drivers/char/random.c:2100:2: error: requested alignment is not an integer constant
     } __aligned(SIPHASH24_ALIGNMENT) combined;
     ^

vim +2046 drivers/char/random.c

  2040		},
  2041	#endif
  2042		{ }
  2043	};
  2044	#endif 	/* CONFIG_SYSCTL */
  2045	
> 2046	static u8 random_int_secret[SIPHASH24_KEY_LEN] __aligned(SIPHASH24_ALIGNMENT);
  2047	
  2048	int random_int_secret_init(void)
  2049	{

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