Re: [PATCH v4] mm: cma: support sysfs

[Dmitry Osipenko <digetx@gmail.com>]

19.03.2021 16:42, Greg Kroah-Hartman пишет:
> On Fri, Mar 19, 2021 at 04:39:41PM +0300, Dmitry Osipenko wrote:
>> 19.03.2021 15:44, Dmitry Osipenko пишет:
>> ...
>>>>  #include <linux/debugfs.h>
>>>> +#include <linux/kobject.h>
>>>> +
>>>> +struct cma_stat {
>>>> +	spinlock_t lock;
>>>> +	/* the number of CMA page successful allocations */
>>>> +	unsigned long nr_pages_succeeded;
>>>> +	/* the number of CMA page allocation failures */
>>>> +	unsigned long nr_pages_failed;
>>>> +	struct kobject kobj;
>>>> +};
>>>>  
>>>>  struct cma {
>>>>  	unsigned long   base_pfn;
>>>> @@ -16,6 +26,9 @@ struct cma {
>>>>  	struct debugfs_u32_array dfs_bitmap;
>>>>  #endif
>>>>  	char name[CMA_MAX_NAME];
>>>> +#ifdef CONFIG_CMA_SYSFS
>>>> +	struct cma_stat	*stat;
>>>> +#endif
>>
>> What is the point of allocating stat dynamically?
> 
> Because static kobjects make me cry.
> 

I meant that it's already a part of struct cma, it looks like the stat
could be embedded into struct cma and then kobj could be initialized
separately.