Re: [PATCH v10 3/6] fs/proc/task_mmu: Implement IOCTL to get and/or the clear info about PTEs

[Muhammad Usama Anjum <usama.anjum@collabora.com>]

On 2/20/23 3:38 PM, Muhammad Usama Anjum wrote:
>>> +#define PAGEMAP_BITS_ALL		(PAGE_IS_WRITTEN | PAGE_IS_FILE |	\
>>> +					 PAGE_IS_PRESENT | PAGE_IS_SWAPPED)
>>> +#define PAGEMAP_NON_WRITTEN_BITS	(PAGE_IS_FILE |	PAGE_IS_PRESENT | PAGE_IS_SWAPPED)
>>> +#define IS_WP_ENGAGE_OP(a)		(a->flags & PAGEMAP_WP_ENGAGE)
>>> +#define IS_GET_OP(a)			(a->vec)
>>> +#define HAS_NO_SPACE(p)			(p->max_pages && (p->found_pages == p->max_pages))
>>> +
>>> +#define PAGEMAP_SCAN_BITMAP(wt, file, present, swap)	\
>>> +	(wt | file << 1 | present << 2 | swap << 3)
>>> +#define IS_WT_REQUIRED(a)				\
>>> +	((a->required_mask & PAGE_IS_WRITTEN) ||	\
>>> +	 (a->anyof_mask & PAGE_IS_WRITTEN))
>> All these macros are specific to pagemap_scan_ioctl() and should be
>> namespaced accordingly, e.g. PM_SCAN_BITS_ALL, PM_SCAN_BITMAP etc.
>>
>> Also, IS_<opname>_OP() will be more readable as PM_SCAN_OP_IS_<opname> and
>> I'd suggest to open code IS_WP_ENGAGE_OP() and IS_GET_OP() and make
>> HAS_NO_SPACE() and IS_WT_REQUIRED() static inlines rather than macros.
> Will do in next version.
> 

IS_WP_ENGAGE_OP() and IS_GET_OP() which can be renamed to
PM_SCAN_OP_IS_WP() and PM_SCAN_OP_IS_GET() seem better to me instead of
open code as they seem more readable to me. I can open code if you insist.

-- 
BR,
Muhammad Usama Anjum