Re: [PATCH v3] dcssblk: add dax_operations support

From: kbuild test robot
Date: Wed Apr 19 2017 - 23:31:13 EST


Hi Dan,

[auto build test ERROR on linus/master]
[also build test ERROR on v4.11-rc7 next-20170419]
[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/Dan-Williams/dcssblk-add-dax_operations-support/20170420-090408
config: s390-defconfig (attached as .config)
compiler: s390x-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=s390

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

>> drivers/s390/block/dcssblk.c:36:46: warning: 'struct dax_device' declared inside parameter list will not be visible outside of this definition or declaration
static long dcssblk_dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff,
^~~~~~~~~~
>> drivers/s390/block/dcssblk.c:49:21: error: variable 'dcssblk_dax_ops' has initializer but incomplete type
static const struct dax_operations dcssblk_dax_ops = {
^~~~~~~~~~~~~~
>> drivers/s390/block/dcssblk.c:50:2: error: unknown field 'direct_access' specified in initializer
.direct_access = dcssblk_dax_direct_access,
^
>> drivers/s390/block/dcssblk.c:50:19: warning: excess elements in struct initializer
.direct_access = dcssblk_dax_direct_access,
^~~~~~~~~~~~~~~~~~~~~~~~~
drivers/s390/block/dcssblk.c:50:19: note: (near initialization for 'dcssblk_dax_ops')
drivers/s390/block/dcssblk.c: In function 'dcssblk_shared_store':
>> drivers/s390/block/dcssblk.c:400:2: error: implicit declaration of function 'kill_dax' [-Werror=implicit-function-declaration]
kill_dax(dev_info->dax_dev);
^~~~~~~~
>> drivers/s390/block/dcssblk.c:401:2: error: implicit declaration of function 'put_dax' [-Werror=implicit-function-declaration]
put_dax(dev_info->dax_dev);
^~~~~~~
drivers/s390/block/dcssblk.c: In function 'dcssblk_add_store':
>> drivers/s390/block/dcssblk.c:667:22: error: implicit declaration of function 'alloc_dax' [-Werror=implicit-function-declaration]
dev_info->dax_dev = alloc_dax(dev_info, dev_info->gd->disk_name,
^~~~~~~~~
>> drivers/s390/block/dcssblk.c:667:20: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
dev_info->dax_dev = alloc_dax(dev_info, dev_info->gd->disk_name,
^
drivers/s390/block/dcssblk.c: At top level:
drivers/s390/block/dcssblk.c:932:1: error: conflicting types for 'dcssblk_dax_direct_access'
dcssblk_dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff,
^~~~~~~~~~~~~~~~~~~~~~~~~
drivers/s390/block/dcssblk.c:36:13: note: previous declaration of 'dcssblk_dax_direct_access' was here
static long dcssblk_dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff,
^~~~~~~~~~~~~~~~~~~~~~~~~
drivers/s390/block/dcssblk.c: In function 'dcssblk_dax_direct_access':
>> drivers/s390/block/dcssblk.c:935:38: error: implicit declaration of function 'dax_get_private' [-Werror=implicit-function-declaration]
struct dcssblk_dev_info *dev_info = dax_get_private(dax_dev);
^~~~~~~~~~~~~~~
>> drivers/s390/block/dcssblk.c:935:38: warning: initialization makes pointer from integer without a cast [-Wint-conversion]
drivers/s390/block/dcssblk.c: At top level:
>> drivers/s390/block/dcssblk.c:49:36: error: storage size of 'dcssblk_dax_ops' isn't known
static const struct dax_operations dcssblk_dax_ops = {
^~~~~~~~~~~~~~~
drivers/s390/block/dcssblk.c:36:13: warning: 'dcssblk_dax_direct_access' used but never defined
static long dcssblk_dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff,
^~~~~~~~~~~~~~~~~~~~~~~~~
drivers/s390/block/dcssblk.c:932:1: warning: 'dcssblk_dax_direct_access' defined but not used [-Wunused-function]
dcssblk_dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff,
^~~~~~~~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors

vim +/dcssblk_dax_ops +49 drivers/s390/block/dcssblk.c

30 static int dcssblk_open(struct block_device *bdev, fmode_t mode);
31 static void dcssblk_release(struct gendisk *disk, fmode_t mode);
32 static blk_qc_t dcssblk_make_request(struct request_queue *q,
33 struct bio *bio);
34 static long dcssblk_blk_direct_access(struct block_device *bdev, sector_t secnum,
35 void **kaddr, pfn_t *pfn, long size);
> 36 static long dcssblk_dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff,
37 long nr_pages, void **kaddr, pfn_t *pfn);
38
39 static char dcssblk_segments[DCSSBLK_PARM_LEN] = "\0";
40
41 static int dcssblk_major;
42 static const struct block_device_operations dcssblk_devops = {
43 .owner = THIS_MODULE,
44 .open = dcssblk_open,
45 .release = dcssblk_release,
46 .direct_access = dcssblk_blk_direct_access,
47 };
48
> 49 static const struct dax_operations dcssblk_dax_ops = {
> 50 .direct_access = dcssblk_dax_direct_access,
51 };
52
53 struct dcssblk_dev_info {

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