[linux-stable-rc:linux-3.18.y 2411/2632] crypto/algif_hash.c:350:13: warning: initialization from incompatible pointer type

[kbuild test robot <fengguang.wu@intel.com>]

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Hi,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-3.18.y
head:   b5076139991c6b12c62346d9880eec1d4227d99f
commit: 677fa15cd6d5b0843e7b9c58409f67d656b1ec2f [2411/2632] compiler-gcc: integrate the various compiler-gcc[345].h files
config: i386-randconfig-s1-201625 (attached as .config)
compiler: gcc-6 (Debian 6.1.1-1) 6.1.1 20160430
reproduce:
        git checkout 677fa15cd6d5b0843e7b9c58409f67d656b1ec2f
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

>> crypto/algif_hash.c:350:13: warning: initialization from incompatible pointer type [-Wincompatible-pointer-types]
     .sendmsg = hash_sendmsg_nokey,
                ^~~~~~~~~~~~~~~~~~
   crypto/algif_hash.c:350:13: note: (near initialization for 'algif_hash_ops_nokey.sendmsg')
   crypto/algif_hash.c:352:13: warning: initialization from incompatible pointer type [-Wincompatible-pointer-types]
     .recvmsg = hash_recvmsg_nokey,
                ^~~~~~~~~~~~~~~~~~
   crypto/algif_hash.c:352:13: note: (near initialization for 'algif_hash_ops_nokey.recvmsg')
--
   drivers/usb/gadget/legacy/inode.c: In function 'ep_aio_rwtail':
>> drivers/usb/gadget/legacy/inode.c:648:10: warning: 'value' may be used uninitialized in this function [-Wmaybe-uninitialized]
      return value;
             ^~~~~
--
   In file included from fs/f2fs/segment.c:20:0:
   fs/f2fs/segment.c: In function 'flush_sit_entries':
>> fs/f2fs/f2fs.h:956:3: warning: 'page' may be used uninitialized in this function [-Wmaybe-uninitialized]
      unlock_page(page);
      ^~~~~~~~~~~~~~~~~
   fs/f2fs/segment.c:1690:16: note: 'page' was declared here
      struct page *page;
                   ^~~~

vim +350 crypto/algif_hash.c

cec8983e Herbert Xu 2016-01-08  334  static struct proto_ops algif_hash_ops_nokey = {
cec8983e Herbert Xu 2016-01-08  335  	.family		=	PF_ALG,
cec8983e Herbert Xu 2016-01-08  336  
cec8983e Herbert Xu 2016-01-08  337  	.connect	=	sock_no_connect,
cec8983e Herbert Xu 2016-01-08  338  	.socketpair	=	sock_no_socketpair,
cec8983e Herbert Xu 2016-01-08  339  	.getname	=	sock_no_getname,
cec8983e Herbert Xu 2016-01-08  340  	.ioctl		=	sock_no_ioctl,
cec8983e Herbert Xu 2016-01-08  341  	.listen		=	sock_no_listen,
cec8983e Herbert Xu 2016-01-08  342  	.shutdown	=	sock_no_shutdown,
cec8983e Herbert Xu 2016-01-08  343  	.getsockopt	=	sock_no_getsockopt,
cec8983e Herbert Xu 2016-01-08  344  	.mmap		=	sock_no_mmap,
cec8983e Herbert Xu 2016-01-08  345  	.bind		=	sock_no_bind,
cec8983e Herbert Xu 2016-01-08  346  	.setsockopt	=	sock_no_setsockopt,
cec8983e Herbert Xu 2016-01-08  347  	.poll		=	sock_no_poll,
cec8983e Herbert Xu 2016-01-08  348  
cec8983e Herbert Xu 2016-01-08  349  	.release	=	af_alg_release,
cec8983e Herbert Xu 2016-01-08 @350  	.sendmsg	=	hash_sendmsg_nokey,
cec8983e Herbert Xu 2016-01-08  351  	.sendpage	=	hash_sendpage_nokey,
cec8983e Herbert Xu 2016-01-08  352  	.recvmsg	=	hash_recvmsg_nokey,
cec8983e Herbert Xu 2016-01-08  353  	.accept		=	hash_accept_nokey,
cec8983e Herbert Xu 2016-01-08  354  };
cec8983e Herbert Xu 2016-01-08  355  
fe869cdb Herbert Xu 2010-10-19  356  static void *hash_bind(const char *name, u32 type, u32 mask)
fe869cdb Herbert Xu 2010-10-19  357  {
cec8983e Herbert Xu 2016-01-08  358  	struct algif_hash_tfm *tfm;

:::::: The code at line 350 was first introduced by commit
:::::: cec8983e6d2cf52e60cd59583ae30f81f923f563 crypto: algif_hash - Require setkey before accept(2)

:::::: TO: Herbert Xu <herbert@gondor.apana.org.au>
:::::: CC: Sasha Levin <sasha.levin@oracle.com>

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