It is probably that m68k lage quite behind in GCC versions and
probably that compiler can not handle this construct:
> 1983 if (memcmp(name, (char []) {0x93, 0xAD, 0x25, 0x50,
1984 0x9C, 0xB4, 0x11, 0xE7, 0xB4,
0x23, 0x83,
> 1985 0xDE, 0x96, 0x8B, 0xCD, 0x7C}, 16) == 0)
and you would probably need something like this:
const char foo[] = {0x93, 0xAD, 0x25, 0x50, 0x9C, 0xB4, 0x11,
0xE7, 0xB4, 0x23, 0x83, 0xDE, 0x96, 0x8B, 0xCD, 0x7C};
if (memcmp(name, foo, sizeof(foo)) == 0)
...
On Fri, Feb 7, 2020 at 8:48 AM Steve French <smfrench@xxxxxxxxx> wrote:
>
> It compiled and tested ok. Is this warning a limitation of the kbuild robot?
>
> On Thu, Feb 6, 2020 at 4:26 PM kbuild test robot <lkp@xxxxxxxxx> wrote:
> >
> > tree: git://git.samba.org/sfrench/cifs-2.6.git for-next
> > head: 58b322cfd219fd570d4fcc2e2eb8b5d945389d46
> > commit: 3d9d8c48232a668ada5f680f70c8b3d366629ab6 [10/11] smb3: print warning once if posix context returned on open
> > config: m68k-multi_defconfig (attached as .config)
> > compiler: m68k-linux-gcc (GCC) 7.5.0
> > reproduce:
> > wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> > chmod +x ~/bin/make.cross
> > git checkout 3d9d8c48232a668ada5f680f70c8b3d366629ab6
> > # save the attached .config to linux build tree
> > GCC_VERSION=7.5.0 make.cross ARCH=m68k
> >
> > If you fix the issue, kindly add following tag
> > Reported-by: kbuild test robot <lkp@xxxxxxxxx>
> >
> > All errors (new ones prefixed by >>):
> >
> > fs/cifs/smb2pdu.c: In function 'smb2_parse_contexts':
> > >> fs/cifs/smb2pdu.c:1985:38: error: macro "memcmp" passed 18 arguments, but takes just 3
> > 0xDE, 0x96, 0x8B, 0xCD, 0x7C}, 16) == 0)
> > ^
> > >> fs/cifs/smb2pdu.c:1983:8: error: 'memcmp' undeclared (first use in this function); did you mean 'memchr'?
> > if (memcmp(name, (char []) {0x93, 0xAD, 0x25, 0x50,
> > ^~~~~~
> > memchr
> > fs/cifs/smb2pdu.c:1983:8: note: each undeclared identifier is reported only once for each function it appears in
> >
> > vim +/memcmp +1985 fs/cifs/smb2pdu.c
> >
> > 1951
> > 1952 void
> > 1953 smb2_parse_contexts(struct TCP_Server_Info *server,
> > 1954 struct smb2_create_rsp *rsp,
> > 1955 unsigned int *epoch, char *lease_key, __u8 *oplock,
> > 1956 struct smb2_file_all_info *buf)
> > 1957 {
> > 1958 char *data_offset;
> > 1959 struct create_context *cc;
> > 1960 unsigned int next;
> > 1961 unsigned int remaining;
> > 1962 char *name;
> > 1963
> > 1964 *oplock = 0;
> > 1965 data_offset = (char *)rsp + le32_to_cpu(rsp->CreateContextsOffset);
> > 1966 remaining = le32_to_cpu(rsp->CreateContextsLength);
> > 1967 cc = (struct create_context *)data_offset;
> > 1968
> > 1969 /* Initialize inode number to 0 in case no valid data in qfid context */
> > 1970 if (buf)
> > 1971 buf->IndexNumber = 0;
> > 1972
> > 1973 while (remaining >= sizeof(struct create_context)) {
> > 1974 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
> > 1975 if (le16_to_cpu(cc->NameLength) == 4 &&
> > 1976 strncmp(name, SMB2_CREATE_REQUEST_LEASE, 4) == 0)
> > 1977 *oplock = server->ops->parse_lease_buf(cc, epoch,
> > 1978 lease_key);
> > 1979 else if (buf && (le16_to_cpu(cc->NameLength) == 4) &&
> > 1980 strncmp(name, SMB2_CREATE_QUERY_ON_DISK_ID, 4) == 0)
> > 1981 parse_query_id_ctxt(cc, buf);
> > 1982 else if ((le16_to_cpu(cc->NameLength) == 16)) {
> > > 1983 if (memcmp(name, (char []) {0x93, 0xAD, 0x25, 0x50,
> > 1984 0x9C, 0xB4, 0x11, 0xE7, 0xB4, 0x23, 0x83,
> > > 1985 0xDE, 0x96, 0x8B, 0xCD, 0x7C}, 16) == 0)
> > 1986 parse_posix_ctxt(cc, NULL);
> > 1987 }
> > 1988 /* else {
> > 1989 cifs_dbg(FYI, "Context not matched with len %d\n",
> > 1990 le16_to_cpu(cc->NameLength));
> > 1991 cifs_dump_mem("Cctxt name: ", name, 4);
> > 1992 } */
> > 1993
> > 1994 next = le32_to_cpu(cc->Next);
> > 1995 if (!next)
> > 1996 break;
> > 1997 remaining -= next;
> > 1998 cc = (struct create_context *)((char *)cc + next);
> > 1999 }
> > 2000
> > 2001 if (rsp->OplockLevel != SMB2_OPLOCK_LEVEL_LEASE)
> > 2002 *oplock = rsp->OplockLevel;
> > 2003
> > 2004 return;
> > 2005 }
> > 2006
> >
> > ---
> > 0-DAY CI Kernel Test Service, Intel Corporation
> > https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
>
>
>
> --
> Thanks,
>
> Steve
