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SubjectRe: [PATCH net-next 1/2] fs/crashdd: add API to collect hardware dump in second kernel
Hi Rahul,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on net-next/master]

url: https://github.com/0day-ci/linux/commits/Rahul-Lakkireddy/fs-crashdd-add-API-to-collect-hardware-dump-in-second-kernel/20180324-193856
config: i386-randconfig-n0-201811 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
# save the attached .config to linux build tree
make ARCH=i386

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

In file included from fs/crashdd/crashdd.c:8:0:
>> fs/crashdd/crashdd_internal.h:13:23: error: field 'bin_attr' has incomplete type
struct bin_attribute bin_attr; /* Binary dump file's attributes */
^~~~~~~~
fs/crashdd/crashdd.c: In function 'crashdd_read':
>> fs/crashdd/crashdd.c:20:43: error: dereferencing pointer to incomplete type 'struct bin_attribute'
struct crashdd_dump_node *dump = bin_attr->private;
^~
fs/crashdd/crashdd.c: In function 'crashdd_mkdir':
>> fs/crashdd/crashdd.c:28:9: error: implicit declaration of function 'kobject_create_and_add'; did you mean 'proc_create_data'? [-Werror=implicit-function-declaration]
return kobject_create_and_add(name, crashdd_kobj);
^~~~~~~~~~~~~~~~~~~~~~
proc_create_data
>> fs/crashdd/crashdd.c:28:9: warning: return makes pointer from integer without a cast [-Wint-conversion]
return kobject_create_and_add(name, crashdd_kobj);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/crashdd/crashdd.c: In function 'crashdd_add_file':
>> fs/crashdd/crashdd.c:40:9: error: implicit declaration of function 'sysfs_create_bin_file' [-Werror=implicit-function-declaration]
return sysfs_create_bin_file(kobj, &dump->bin_attr);
^~~~~~~~~~~~~~~~~~~~~
fs/crashdd/crashdd.c: In function 'crashdd_rmdir':
>> fs/crashdd/crashdd.c:45:2: error: implicit declaration of function 'kobject_put'; did you mean 'kref_put'? [-Werror=implicit-function-declaration]
kobject_put(kobj);
^~~~~~~~~~~
kref_put
fs/crashdd/crashdd.c: In function 'crashdd_get_driver':
>> fs/crashdd/crashdd.c:102:25: error: dereferencing pointer to incomplete type 'struct kobject'
if (!strcmp(node->kobj->name, name)) {
^~
fs/crashdd/crashdd.c: In function 'crashdd_init':
>> fs/crashdd/crashdd.c:228:51: error: 'kernel_kobj' undeclared (first use in this function); did you mean 'kernel_read'?
crashdd_kobj = kobject_create_and_add("crashdd", kernel_kobj);
^~~~~~~~~~~
kernel_read
fs/crashdd/crashdd.c:228:51: note: each undeclared identifier is reported only once for each function it appears in
fs/crashdd/crashdd.c: In function 'crashdd_add_file':
>> fs/crashdd/crashdd.c:41:1: warning: control reaches end of non-void function [-Wreturn-type]
}
^
cc1: some warnings being treated as errors

vim +/bin_attr +13 fs/crashdd/crashdd_internal.h

6
7 /* Binary dump file's context internal to crashdd */
8 struct crashdd_dump_node {
9 /* Pointer to list of dumps under the driver sysfs entry */
10 struct list_head list;
11 void *buf; /* Buffer containing device's dump */
12 unsigned long size; /* Size of the buffer */
> 13 struct bin_attribute bin_attr; /* Binary dump file's attributes */
14 };
15

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