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SubjectRe: [Patch v4 12/22] CIFS: SMBD: Implement function to receive data via RDMA receive
Hi Long,

[auto build test ERROR on cifs/for-next]
[also build test ERROR on v4.14-rc3 next-20170929]
[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/Long-Li/CIFS-Implement-SMBDirect/20171004-165915
base: git://git.samba.org/sfrench/cifs-2.6.git for-next
config: i386-randconfig-x005-201740 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
# save the attached .config to linux build tree
make ARCH=i386

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

fs/cifs/smbdirect.c: In function 'smbd_recv_page':
>> fs/cifs/smbdirect.c:1923:15: error: implicit declaration of function 'kmap_atomic' [-Werror=implicit-function-declaration]
to_address = kmap_atomic(page);
^~~~~~~~~~~
>> fs/cifs/smbdirect.c:1923:13: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
to_address = kmap_atomic(page);
^
>> fs/cifs/smbdirect.c:1929:2: error: implicit declaration of function 'kunmap_atomic' [-Werror=implicit-function-declaration]
kunmap_atomic(to_address);
^~~~~~~~~~~~~
cc1: some warnings being treated as errors

vim +/kmap_atomic +1923 fs/cifs/smbdirect.c

1901
1902 /*
1903 * Receive a page from receive reassembly queue
1904 * page: the page to read data into
1905 * to_read: the length of data to read
1906 * return value: actual data read
1907 */
1908 int smbd_recv_page(struct smbd_connection *info,
1909 struct page *page, unsigned int to_read)
1910 {
1911 int ret;
1912 char *to_address;
1913
1914 /* make sure we have the page ready for read */
1915 ret = wait_event_interruptible(
1916 info->wait_reassembly_queue,
1917 info->reassembly_data_length >= to_read ||
1918 info->transport_status != SMBD_CONNECTED);
1919 if (ret)
1920 return 0;
1921
1922 /* now we can read from reassembly queue and not sleep */
> 1923 to_address = kmap_atomic(page);
1924
1925 log_read(INFO, "reading from page=%p address=%p to_read=%d\n",
1926 page, to_address, to_read);
1927
1928 ret = smbd_recv_buf(info, to_address, to_read);
> 1929 kunmap_atomic(to_address);
1930
1931 return ret;
1932 }
1933

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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