Re: [PATCH] staging: wilc1000: fix undefined reference to `__this_module' compilation error

[Ajay Singh <ajay.kathat@microchip.com>]

Hi Dan,

On Thu, 9 Aug 2018 13:08:38 +0300
Dan Carpenter <dan.carpenter@oracle.com> wrote:

> On Thu, Aug 09, 2018 at 12:13:06PM +0530, Ajay Singh wrote:
> > wilc_debug.o object file is included for both SDIO and SPI module.
> > When anyone(either SDIO or SPI) module is compiled as loaded module
> > and another as buildin module then below compilation error occurs.
> > 
> > "drivers/staging/wilc1000/wilc_debugfs.o:(.data+0x10): undefined
> > reference to `__this_module'"
> > 
> > Moved the declaration of file_operation variable in SDIO/SPI files
> > and pass this as parameter to wilc_debugfs_init().
> > Refactor wilc_debugfs_init() as its not required to maintain
> > 'wilc_debugfs_info_t' in debugfs_info[] array. Also modified file
> > permission from 0666 to 0600 & use 'data' field as 'NULL' in
> > debugfs_create_file() call.
> > 
> > Fixes: 9abc44ba4e2f("staging: wilc1000: fix TODO to compile spi and
> > sdio components in single module")
> > 
> > Reported-by: kbuild test robot <lkp@intel.com>  
> 
> I don't think you need to resend, but the Fixes tag format isn't
> right.
> 
> 1) Don't line wrap it.  (Maybe checkpatch complains?  Ignore
> checkpatch). 2) Put a space between the git hash and the '('.
> 3) No blank line between the Fixes and the Reported-by.

Thanks for your inputs.
I will update this commit descriptor and resubmit the patch with
correct Fixes tag.

> 
> > -int wilc_debugfs_init(void)
> > +int wilc_debugfs_init(const struct file_operations *fops)  
> 
> You may as well make wilc_debugfs_init() void since no one checks it.
> 
> >  {
> > -	int i;
> > -	struct wilc_debugfs_info_t *info;
> > -
> >  	wilc_dir = debugfs_create_dir("wilc_wifi", NULL);
> > -	for (i = 0; i < ARRAY_SIZE(debugfs_info); i++) {
> > -		info = &debugfs_info[i];
> > -		debugfs_create_file(info->name,
> > -				    info->perm,
> > -				    wilc_dir,
> > -				    &info->data,
> > -				    &info->fops);
> > +	if (IS_ERR_OR_NULL(wilc_dir)) {
> > +		pr_err("Error creating debugfs\n");
> > +		return -EFAULT;
> >  	}  
> 
> Just check for NULL.  If someone builds without debugfs enabled in
> their .config, that's their choice.  No need to print a warning.
> 

Sure, I will also include these changes.

Regards,
Ajay