[cifs:test-dfs-changes 4/8] fs/cifs/smb2ops.c:1160:5: error: passing argument 10 of 'SMB2_ioctl' from incompatible pointer type

[cifs:test-dfs-changes 4/8] fs/cifs/smb2ops.c:1160:5: error: passing argument 10 of 'SMB2_ioctl' from incompatible pointer type

[kbuild test robot]

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tree:   git://git.samba.org/sfrench/cifs-2.6.git test-dfs-changes
head:   a9b2aa61e0eaa46d565a71a637935c1b124b8a3e
commit: 8569b5b287d4ec69f09e33d77552ede35db4239b [4/8] CIFS: implement get_dfs_refer for SMB2+
config: i386-randconfig-x003-201709 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        git checkout 8569b5b287d4ec69f09e33d77552ede35db4239b
        # save the attached .config to linux build tree
        make ARCH=i386 

Note: the cifs/test-dfs-changes HEAD a9b2aa61e0eaa46d565a71a637935c1b124b8a3e builds fine.
      It only hurts bisectibility.

All error/warnings (new ones prefixed by >>):

   fs/cifs/smb2ops.c: In function 'smb2_get_dfs_refer':
>> fs/cifs/smb2ops.c:1158:26: warning: passing argument 7 of 'SMB2_ioctl' makes pointer from integer without a cast [-Wint-conversion]
        true /* is_fsctl */, true /* use_ipc */,
                             ^~~~
   In file included from fs/cifs/smb2ops.c:27:0:
   fs/cifs/smb2proto.h:122:12: note: expected 'char *' but argument is of type 'int'
    extern int SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon,
               ^~~~~~~~~~
>> fs/cifs/smb2ops.c:1159:5: warning: passing argument 8 of 'SMB2_ioctl' makes integer from pointer without a cast [-Wint-conversion]
        (char *)dfs_req, dfs_req_size,
        ^
   In file included from fs/cifs/smb2ops.c:27:0:
   fs/cifs/smb2proto.h:122:12: note: expected 'u32 {aka unsigned int}' but argument is of type 'char *'
    extern int SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon,
               ^~~~~~~~~~
   fs/cifs/smb2ops.c:1159:22: warning: passing argument 9 of 'SMB2_ioctl' makes pointer from integer without a cast [-Wint-conversion]
        (char *)dfs_req, dfs_req_size,
                         ^~~~~~~~~~~~
   In file included from fs/cifs/smb2ops.c:27:0:
   fs/cifs/smb2proto.h:122:12: note: expected 'char **' but argument is of type 'u32 {aka unsigned int}'
    extern int SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon,
               ^~~~~~~~~~
>> fs/cifs/smb2ops.c:1160:5: error: passing argument 10 of 'SMB2_ioctl' from incompatible pointer type [-Werror=incompatible-pointer-types]
        (char **)&dfs_rsp, &dfs_rsp_size);
        ^
   In file included from fs/cifs/smb2ops.c:27:0:
   fs/cifs/smb2proto.h:122:12: note: expected 'u32 * {aka unsigned int *}' but argument is of type 'char **'
    extern int SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon,
               ^~~~~~~~~~
>> fs/cifs/smb2ops.c:1156:8: error: too many arguments to function 'SMB2_ioctl'
      rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
           ^~~~~~~~~~
   In file included from fs/cifs/smb2ops.c:27:0:
   fs/cifs/smb2proto.h:122:12: note: declared here
    extern int SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon,
               ^~~~~~~~~~
   fs/cifs/smb2ops.c:1166:6: warning: passing argument 8 of 'SMB2_ioctl' makes integer from pointer without a cast [-Wint-conversion]
         (char *)dfs_req, dfs_req_size,
         ^
   In file included from fs/cifs/smb2ops.c:27:0:
   fs/cifs/smb2proto.h:122:12: note: expected 'u32 {aka unsigned int}' but argument is of type 'char *'
    extern int SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon,
               ^~~~~~~~~~
   fs/cifs/smb2ops.c:1166:23: warning: passing argument 9 of 'SMB2_ioctl' makes pointer from integer without a cast [-Wint-conversion]
         (char *)dfs_req, dfs_req_size,
                          ^~~~~~~~~~~~
   In file included from fs/cifs/smb2ops.c:27:0:
   fs/cifs/smb2proto.h:122:12: note: expected 'char **' but argument is of type 'u32 {aka unsigned int}'
    extern int SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon,
               ^~~~~~~~~~
   fs/cifs/smb2ops.c:1167:6: error: passing argument 10 of 'SMB2_ioctl' from incompatible pointer type [-Werror=incompatible-pointer-types]
         (char **)&dfs_rsp, &dfs_rsp_size);
         ^
   In file included from fs/cifs/smb2ops.c:27:0:
   fs/cifs/smb2proto.h:122:12: note: expected 'u32 * {aka unsigned int *}' but argument is of type 'char **'
    extern int SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon,
               ^~~~~~~~~~
   fs/cifs/smb2ops.c:1163:9: error: too many arguments to function 'SMB2_ioctl'
       rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
            ^~~~~~~~~~
   In file included from fs/cifs/smb2ops.c:27:0:
   fs/cifs/smb2proto.h:122:12: note: declared here
    extern int SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon,
               ^~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/SMB2_ioctl +1160 fs/cifs/smb2ops.c

  1150	
  1151		/* Path to resolve in an UTF-16 null-terminated string */
  1152		memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
  1153	
  1154		do {
  1155			/* try first with IPC */
> 1156			rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
  1157					FSCTL_DFS_GET_REFERRALS,
> 1158					true /* is_fsctl */, true /* use_ipc */,
> 1159					(char *)dfs_req, dfs_req_size,
> 1160					(char **)&dfs_rsp, &dfs_rsp_size);
  1161			if (rc == -ENOTCONN) {
  1162				/* try with normal tcon */
  1163				rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,

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